[Driver] Fix test usages of --rtlib= without --unwindlib=

[abrachet]

Summary

These errors surfaced after D156363. The error
"--rtlib=libgcc requires --unwindlib=libgcc" happens only when
CLANG_DEFAULT_UNWINDLIB has been specified at build time.

[MaskRay]

Thanks!

clang/test/Driver/csky-toolchain.c

 // UNSUPPORTED: system-windows
 // A basic clang -cc1 command-line, and simple environment check.
 
 // RUN: %clang -### %s --target=csky 2>&1 | FileCheck -check-prefix=CC1 %s
 // CC1: "-cc1" "-triple" "csky"
 
 // In the below tests, --rtlib=platform is used so that the driver ignores
 // the configure-time CLANG_DEFAULT_RTLIB option when choosing the runtime lib
 
-// RUN: %clang -### %s -fuse-ld=ld -no-pie --target=csky-unknown-linux-gnu --rtlib=platform  \
+// RUN: %clang -### %s -fuse-ld=ld -no-pie --target=csky-unknown-linux-gnu --rtlib=platform --unwindlib=platform \
 // RUN:   --gcc-toolchain=%S/Inputs/multilib_csky_linux_sdk  2>&1 | FileCheck -check-prefix=C-CSKY-LINUX-MULTI %s
 
 // C-CSKY-LINUX-MULTI: "{{.*}}/Inputs/multilib_csky_linux_sdk/lib/gcc/csky-linux-gnuabiv2/6.3.0/../../..{{/|\\\\}}..{{/|\\\\}}csky-linux-gnuabiv2/bin{{/|\\\\}}ld"
 // C-CSKY-LINUX-MULTI: "--sysroot={{.*}}/Inputs/multilib_csky_linux_sdk/lib/gcc/csky-linux-gnuabiv2/6.3.0/../../..{{/|\\\\}}..{{/|\\\\}}csky-linux-gnuabiv2/libc"
 // C-CSKY-LINUX-MULTI: "-m" "cskyelf_linux"
 // C-CSKY-LINUX-MULTI: "-dynamic-linker" "/lib/ld.so.1"
 // C-CSKY-LINUX-MULTI: "{{.*}}/Inputs/multilib_csky_linux_sdk/lib/gcc/csky-linux-gnuabiv2/6.3.0/../../..{{/|\\\\}}..{{/|\\\\}}csky-linux-gnuabiv2/libc/usr/lib/../lib/crt1.o"
 // C-CSKY-LINUX-MULTI: "{{.*}}/Inputs/multilib_csky_linux_sdk/lib/gcc/csky-linux-gnuabiv2/6.3.0/crti.o"
 // C-CSKY-LINUX-MULTI: "{{.*}}/Inputs/multilib_csky_linux_sdk/lib/gcc/csky-linux-gnuabiv2/6.3.0/crtbegin.o"
 // C-CSKY-LINUX-MULTI: "-L{{.*}}/Inputs/multilib_csky_linux_sdk/lib/gcc/csky-linux-gnuabiv2/6.3.0"
 // C-CSKY-LINUX-MULTI: "-L{{.*}}/Inputs/multilib_csky_linux_sdk/lib/gcc/csky-linux-gnuabiv2/6.3.0/../../..{{/|\\\\}}..{{/|\\\\}}csky-linux-gnuabiv2/libc/lib/../lib"
 // C-CSKY-LINUX-MULTI: "-L{{.*}}/Inputs/multilib_csky_linux_sdk/lib/gcc/csky-linux-gnuabiv2/6.3.0/../../..{{/|\\\\}}..{{/|\\\\}}csky-linux-gnuabiv2/libc/usr/lib/../lib"
 // C-CSKY-LINUX-MULTI: "-L{{.*}}/Inputs/multilib_csky_linux_sdk/lib/gcc/csky-linux-gnuabiv2/6.3.0/../../..{{/|\\\\}}..{{/|\\\\}}csky-linux-gnuabiv2/libc/lib"
 // C-CSKY-LINUX-MULTI: "-L{{.*}}/Inputs/multilib_csky_linux_sdk/lib/gcc/csky-linux-gnuabiv2/6.3.0/../../..{{/|\\\\}}..{{/|\\\\}}csky-linux-gnuabiv2/libc/usr/lib"
 
-// RUN: %clang -### %s -fuse-ld=ld -fno-pic -no-pie --target=csky-unknown-linux-gnu --rtlib=platform -march=ck860v \
+// RUN: %clang -### %s -fuse-ld=ld -fno-pic -no-pie --target=csky-unknown-linux-gnu --rtlib=platform --unwindlib=platform -march=ck860v \
 // RUN:   --gcc-toolchain=%S/Inputs/multilib_csky_linux_sdk 2>&1 | FileCheck -check-prefix=C-CSKY-LINUX-CK860V %s
 
 // C-CSKY-LINUX-CK860V: "{{.*}}/Inputs/multilib_csky_linux_sdk/lib/gcc/csky-linux-gnuabiv2/6.3.0/../../..{{/|\\\\}}..{{/|\\\\}}csky-linux-gnuabiv2/bin{{/|\\\\}}ld"
 // C-CSKY-LINUX-CK860V: "--sysroot={{.*}}/Inputs/multilib_csky_linux_sdk/lib/gcc/csky-linux-gnuabiv2/6.3.0/../../..{{/|\\\\}}..{{/|\\\\}}csky-linux-gnuabiv2/libc/ck860v"
 // C-CSKY-LINUX-CK860V: "-m" "cskyelf_linux"
 // C-CSKY-LINUX-CK860V: "-dynamic-linker" "/lib/ld.so.1"
 // C-CSKY-LINUX-CK860V: "{{.*}}/Inputs/multilib_csky_linux_sdk/lib/gcc/csky-linux-gnuabiv2/6.3.0/../../..{{/|\\\\}}..{{/|\\\\}}csky-linux-gnuabiv2/libc/ck860v/usr/lib/../lib/crt1.o"
 // C-CSKY-LINUX-CK860V: "{{.*}}/Inputs/multilib_csky_linux_sdk/lib/gcc/csky-linux-gnuabiv2/6.3.0/ck860v/crti.o"
 // C-CSKY-LINUX-CK860V: "{{.*}}/Inputs/multilib_csky_linux_sdk/lib/gcc/csky-linux-gnuabiv2/6.3.0/ck860v/crtbegin.o"
 // C-CSKY-LINUX-CK860V: "-L{{.*}}/Inputs/multilib_csky_linux_sdk/lib/gcc/csky-linux-gnuabiv2/6.3.0/ck860v"
 // C-CSKY-LINUX-CK860V: "-L{{.*}}/Inputs/multilib_csky_linux_sdk/lib/gcc/csky-linux-gnuabiv2/6.3.0/../../..{{/|\\\\}}..{{/|\\\\}}csky-linux-gnuabiv2/libc/ck860v/lib/../lib"
 // C-CSKY-LINUX-CK860V: "-L{{.*}}/Inputs/multilib_csky_linux_sdk/lib/gcc/csky-linux-gnuabiv2/6.3.0/../../..{{/|\\\\}}..{{/|\\\\}}csky-linux-gnuabiv2/libc/ck860v/usr/lib/../lib"
 // C-CSKY-LINUX-CK860V: "-L{{.*}}/Inputs/multilib_csky_linux_sdk/lib/gcc/csky-linux-gnuabiv2/6.3.0/../../..{{/|\\\\}}..{{/|\\\\}}csky-linux-gnuabiv2/libc/ck860v/lib"
 // C-CSKY-LINUX-CK860V: "-L{{.*}}/Inputs/multilib_csky_linux_sdk/lib/gcc/csky-linux-gnuabiv2/6.3.0/../../..{{/|\\\\}}..{{/|\\\\}}csky-linux-gnuabiv2/libc/ck860v/usr/lib"

clang/test/Driver/env.c

 // These tests try to ensure that the driver operates reasonably when run with
 // a strange environment. Unfortunately, it requires a normal shell and the
 // 'env' command that understands arguments, unlike the LIT built-in env.
 //
 // REQUIRES: shell
 // The PATH variable is heavily used when trying to find a linker.
 // RUN: env -i LC_ALL=C LD_LIBRARY_PATH="$LD_LIBRARY_PATH" CLANG_NO_DEFAULT_CONFIG=1 \
 // RUN:   %clang %s -### -o %t.o --target=i386-unknown-linux \
 // RUN:     --sysroot=%S/Inputs/basic_linux_tree \
-// RUN:     --rtlib=platform -no-pie \
+// RUN:     --rtlib=platform --unwindlib=platform -no-pie \
 // RUN:     --gcc-toolchain="" 2>&1 | FileCheck --check-prefix=CHECK-LD-32 %s
 //
 // RUN: env -i LC_ALL=C PATH="" LD_LIBRARY_PATH="$LD_LIBRARY_PATH" CLANG_NO_DEFAULT_CONFIG=1 \
 // RUN:   %clang %s -### -o %t.o --target=i386-unknown-linux \
 // RUN:     --sysroot=%S/Inputs/basic_linux_tree \
-// RUN:     --rtlib=platform -no-pie \
+// RUN:     --rtlib=platform --unwindlib=platform -no-pie \
 // RUN:     --gcc-toolchain="" 2>&1 | FileCheck --check-prefix=CHECK-LD-32 %s
 //
 // CHECK-LD-32-NOT: warning:
 // CHECK-LD-32: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-LD-32: "{{.*}}/usr/lib/gcc/i386-unknown-linux/10.2.0{{/|\\\\}}crtbegin.o"
 // CHECK-LD-32: "-L[[SYSROOT]]/usr/lib/gcc/i386-unknown-linux/10.2.0"
 // CHECK-LD-32: "-L[[SYSROOT]]/usr/lib/gcc/i386-unknown-linux/10.2.0/../../../../i386-unknown-linux/lib"
 // CHECK-LD-32: "-L[[SYSROOT]]/lib"
 // CHECK-LD-32: "-L[[SYSROOT]]/usr/lib"

clang/test/Driver/gcc-install-dir.cpp

 // UNSUPPORTED: system-windows
 
 /// Test native GCC installation on Arch Linux i686.
 // RUN: %clang -### %s --target=i686-linux-gnu --sysroot=%S/Inputs/archlinux_i686_tree -ccc-install-dir %S/Inputs/basic_linux_tree/usr/bin \
-// RUN:   --stdlib=platform --rtlib=platform \
+// RUN:   --stdlib=platform --rtlib=platform --unwindlib=platform \
 // RUN:   --gcc-install-dir=%S/Inputs/archlinux_i686_tree/usr/lib/gcc/i686-pc-linux-gnu/11.1.0 2>&1 | FileCheck %s --check-prefix=ARCH_I686
 // ARCH_I686:      "-internal-isystem"
 // ARCH_I686-SAME: {{^}} "[[SYSROOT:[^"]+]]/usr/lib/gcc/i686-pc-linux-gnu/11.1.0/../../../../include/c++/11.1.0"
 // ARCH_I686-SAME: {{^}} "-internal-isystem" "[[SYSROOT:[^"]+]]/usr/lib/gcc/i686-pc-linux-gnu/11.1.0/../../../../include/c++/11.1.0/i686-pc-linux-gnu"
 // ARCH_I686:      "-L
 // ARCH_I686-SAME: {{^}}[[SYSROOT]]/usr/lib/gcc/i686-pc-linux-gnu/11.1.0"
 // ARCH_I686-SAME: {{^}} "-L[[SYSROOT]]/lib"
 // ARCH_I686-SAME: {{^}} "-L[[SYSROOT]]/usr/lib"
 
 /// Test native GCC installation on Debian amd64. --gcc-install-dir= may end with /.
 // RUN: %clangxx %s -### --target=x86_64-unknown-linux-gnu --sysroot=%S/Inputs/debian_multiarch_tree \
-// RUN:   -ccc-install-dir %S/Inputs/basic_linux_tree/usr/bin -resource-dir=%S/Inputs/resource_dir --stdlib=platform --rtlib=platform \
+// RUN:   -ccc-install-dir %S/Inputs/basic_linux_tree/usr/bin -resource-dir=%S/Inputs/resource_dir --stdlib=platform --rtlib=platform --unwindlib=platform \
 // RUN:   --gcc-install-dir=%S/Inputs/debian_multiarch_tree/usr/lib/gcc/x86_64-linux-gnu/10/ 2>&1 | FileCheck %s --check-prefix=DEBIAN_X86_64
 // DEBIAN_X86_64:      "-internal-isystem"
 // DEBIAN_X86_64-SAME: {{^}} "[[SYSROOT:[^"]+]]/usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10"
 // DEBIAN_X86_64-SAME: {{^}} "-internal-isystem" "[[SYSROOT:[^"]+]]/usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10"
 // DEBIAN_X86_64-SAME: {{^}} "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/backward"
 /// We set explicit -ccc-install-dir ensure that Clang does not pick up extra
 /// library directories which may be present in the runtimes build.
 // DEBIAN_X86_64:      "-L
 // DEBIAN_X86_64-SAME: {{^}}[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/10"
 // DEBIAN_X86_64-SAME: {{^}} "-L[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/10/../../../../lib64"
 
 /// Test -m32.
 // RUN: %clangxx %s -### --target=x86_64-unknown-linux-gnu -m32 --sysroot=%S/Inputs/debian_multiarch_tree \
-// RUN:   -ccc-install-dir %S/Inputs/basic_linux_tree/usr/bin -resource-dir=%S/Inputs/resource_dir --stdlib=platform --rtlib=platform \
+// RUN:   -ccc-install-dir %S/Inputs/basic_linux_tree/usr/bin -resource-dir=%S/Inputs/resource_dir --stdlib=platform --rtlib=platform --unwindlib=platform \
 // RUN:   --gcc-install-dir=%S/Inputs/debian_multiarch_tree/usr/lib/gcc/x86_64-linux-gnu/10/ 2>&1 | FileCheck %s --check-prefix=DEBIAN_X86_64_M32
 // DEBIAN_X86_64_M32:      "-internal-isystem"
 // DEBIAN_X86_64_M32-SAME: {{^}} "[[SYSROOT:[^"]+]]/usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10"
 // DEBIAN_X86_64_M32-SAME: {{^}} "-internal-isystem" "[[SYSROOT:[^"]+]]/usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10/32"
 // DEBIAN_X86_64_M32:      "-L
 // DEBIAN_X86_64_M32-SAME: {{^}}[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/10/32"
 // DEBIAN_X86_64_M32-SAME: {{^}} "-L[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/10/../../../../lib32"
 
 // RUN: not %clangxx %s -### --target=x86_64-unknown-linux-gnu --sysroot=%S/Inputs/debian_multiarch_tree \
 // RUN:   -ccc-install-dir %S/Inputs/basic_linux_tree/usr/bin -resource-dir=%S/Inputs/resource_dir --stdlib=platform --rtlib=platform \
 // RUN:   --gcc-install-dir=%S/Inputs/debian_multiarch_tree/usr/lib/gcc/x86_64-linux-gnu 2>&1 | FileCheck %s --check-prefix=INVALID
 // INVALID: error: '{{.*}}/usr/lib/gcc/x86_64-linux-gnu' does not contain a GCC installation

clang/test/Driver/gcc-toolchain.cpp

 // Test that gcc-toolchain option is working correctly
 //
 /// Without --rtlib=libgcc the driver may pick clang_rt.crtbegin.o if
 /// -DCLANG_DEFAULT_RTLIB=compiler-rt.
 // RUN: %clangxx %s -### --target=x86_64-linux-gnu --sysroot= \
-// RUN:   --gcc-toolchain=%S/Inputs/ubuntu_14.04_multiarch_tree/usr -stdlib=libstdc++ --rtlib=libgcc -no-pie 2>&1 | \
+// RUN:   --gcc-toolchain=%S/Inputs/ubuntu_14.04_multiarch_tree/usr -stdlib=libstdc++ --rtlib=libgcc --unwindlib=libgcc -no-pie 2>&1 | \
 // RUN:   FileCheck %s
 //
 // Additionally check that the legacy spelling of the flag works.
 // RUN: %clangxx %s -### --target=x86_64-linux-gnu --sysroot= \
-// RUN:   --gcc-toolchain=%S/Inputs/ubuntu_14.04_multiarch_tree/usr -stdlib=libstdc++ --rtlib=libgcc -no-pie 2>&1 | \
+// RUN:   --gcc-toolchain=%S/Inputs/ubuntu_14.04_multiarch_tree/usr -stdlib=libstdc++ --rtlib=libgcc --unwindlib=libgcc -no-pie 2>&1 | \
 // RUN:   FileCheck %s
 //
 // Test for header search toolchain detection.
 // CHECK: "-internal-isystem"
 // CHECK: "[[TOOLCHAIN:[^"]+]]/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8"
 // CHECK: "-internal-isystem"
 // CHECK: "[[TOOLCHAIN]]/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/x86_64-linux-gnu/c++/4.8"
 // CHECK: "-internal-isystem"

clang/test/Driver/linux-cross.cpp

 // UNSUPPORTED: system-windows
 
 /// Test native GCC installation on Arch Linux i686.
 // RUN: %clang -### %s --target=i686-linux-gnu --sysroot=%S/Inputs/archlinux_i686_tree \
 // RUN:   -ccc-install-dir %S/Inputs/basic_linux_tree/usr/bin -resource-dir=%S/Inputs/resource_dir \
-// RUN:   --stdlib=platform --rtlib=platform 2>&1 | FileCheck %s --check-prefix=ARCH_I686
+// RUN:   --stdlib=platform --rtlib=platform --unwindlib=platform 2>&1 | FileCheck %s --check-prefix=ARCH_I686
 // ARCH_I686:      "-resource-dir" "[[RESOURCE:[^"]+]]"
 // ARCH_I686:      "-internal-isystem"
 // ARCH_I686-SAME: {{^}} "[[SYSROOT:[^"]+]]/usr/lib/gcc/i686-pc-linux-gnu/11.1.0/../../../../include/c++/11.1.0"
 // ARCH_I686-SAME: {{^}} "-internal-isystem" "[[SYSROOT:[^"]+]]/usr/lib/gcc/i686-pc-linux-gnu/11.1.0/../../../../include/c++/11.1.0/i686-pc-linux-gnu"
 // ARCH_I686-SAME: {{^}} "-internal-isystem" "[[SYSROOT:[^"]+]]/usr/lib/gcc/i686-pc-linux-gnu/11.1.0/../../../../include/c++/11.1.0/backward"
 // ARCH_I686-SAME: {{^}} "-internal-isystem" "[[RESOURCE]]/include"
 // ARCH_I686-SAME: {{^}} "-internal-isystem" "[[SYSROOT]]/usr/local/include"
 /// This resolves to /usr/i686-linux-gnu/include. Because it does not exist,
 /// having it does no harm albeit not ideal.
 // ARCH_I686-SAME: {{^}} "-internal-isystem" "[[SYSROOT:[^"]+]]/usr/lib/gcc/i686-pc-linux-gnu/11.1.0/../../../../i686-pc-linux-gnu/include"
 // ARCH_I686:      "-internal-externc-isystem"
 // ARCH_I686-SAME: {{^}} "[[SYSROOT]]/include"
 // ARCH_I686-SAME: {{^}} "-internal-externc-isystem" "[[SYSROOT]]/usr/include"
 // ARCH_I686:      "-L
 // ARCH_I686-SAME: {{^}}[[SYSROOT]]/usr/lib/gcc/i686-pc-linux-gnu/11.1.0"
 // ARCH_I686-SAME: {{^}} "-L[[SYSROOT]]/lib"
 // ARCH_I686-SAME: {{^}} "-L[[SYSROOT]]/usr/lib"
 
 /// Test native x86-64 in the tree.
 // RUN: %clang -### %s --target=x86_64-linux-gnu --sysroot=%S/Inputs/debian_multiarch_tree \
 // RUN:   -ccc-install-dir %S/Inputs/basic_linux_tree/usr/bin -resource-dir=%S/Inputs/resource_dir \
-// RUN:   --stdlib=platform --rtlib=platform 2>&1 | FileCheck %s --check-prefix=DEBIAN_X86_64
+// RUN:   --stdlib=platform --rtlib=platform --unwindlib=platform 2>&1 | FileCheck %s --check-prefix=DEBIAN_X86_64
 // DEBIAN_X86_64:      "-resource-dir" "[[RESOURCE:[^"]+]]"
 // DEBIAN_X86_64:      "-internal-isystem"
 // DEBIAN_X86_64-SAME: {{^}} "[[SYSROOT:[^"]+]]/usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10"
 // DEBIAN_X86_64-SAME: {{^}} "-internal-isystem" "[[SYSROOT:[^"]+]]/usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10"
 // DEBIAN_X86_64-SAME: {{^}} "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/backward"
 // DEBIAN_X86_64-SAME: {{^}} "-internal-isystem" "[[RESOURCE]]/include"
 // DEBIAN_X86_64-SAME: {{^}} "-internal-isystem" "[[SYSROOT]]/usr/local/include"
 // DEBIAN_X86_64-SAME: {{^}} "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/10/../../../../x86_64-linux-gnu/include"

 /// -ccc-install-dir is not within sysroot. No bin/../lib.
 /// $sysroot/lib and $sysroot/usr/lib. Fallback when GCC installation is unavailable.
 // DEBIAN_X86_64-SAME: {{^}} "-L[[SYSROOT]]/lib"
 // DEBIAN_X86_64-SAME: {{^}} "-L[[SYSROOT]]/usr/lib"
 
 /// Test -m32.
 // RUN: %clang -### %s --target=x86_64-linux-gnu -m32 --sysroot=%S/Inputs/debian_multiarch_tree \
 // RUN:   -ccc-install-dir %S/Inputs/basic_linux_tree/usr/bin -resource-dir=%S/Inputs/resource_dir \
-// RUN:   --stdlib=platform --rtlib=platform 2>&1 | FileCheck %s --check-prefix=DEBIAN_X86_64_M32
+// RUN:   --stdlib=platform --rtlib=platform --unwindlib=platform 2>&1 | FileCheck %s --check-prefix=DEBIAN_X86_64_M32
 // DEBIAN_X86_64_M32:      "-resource-dir" "[[RESOURCE:[^"]+]]"
 // DEBIAN_X86_64_M32:      "-internal-isystem"
 // DEBIAN_X86_64_M32-SAME: {{^}} "[[SYSROOT:[^"]+]]/usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10"
 // DEBIAN_X86_64_M32-SAME: {{^}} "-internal-isystem" "[[SYSROOT:[^"]+]]/usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10/32"
 // DEBIAN_X86_64_M32-SAME: {{^}} "-internal-isystem" "[[SYSROOT:[^"]+]]/usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/backward"
 // DEBIAN_X86_64_M32-SAME: {{^}} "-internal-isystem" "[[RESOURCE]]/include"
 // DEBIAN_X86_64_M32-SAME: {{^}} "-internal-isystem" "[[SYSROOT]]/usr/local/include"
 // DEBIAN_X86_64_M32-SAME: {{^}} "-internal-isystem" "[[SYSROOT:[^"]+]]/usr/lib/gcc/x86_64-linux-gnu/10/../../../../x86_64-linux-gnu/include"
 // DEBIAN_X86_64_M32:      "-internal-externc-isystem"
 // DEBIAN_X86_64_M32-SAME: {{^}} "[[SYSROOT]]/usr/include/i386-linux-gnu"
 // DEBIAN_X86_64_M32:      "-L
 // DEBIAN_X86_64_M32-SAME: {{^}}[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/10/32"
 // DEBIAN_X86_64_M32-SAME: {{^}} "-L[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/10/../../../../lib32"
 // DEBIAN_X86_64_M32-SAME: {{^}} "-L[[SYSROOT]]/lib/i386-linux-gnu"
 // DEBIAN_X86_64_M32-SAME: {{^}} "-L[[SYSROOT]]/lib/../lib32"
 // DEBIAN_X86_64_M32-SAME: {{^}} "-L[[SYSROOT]]/usr/lib/i386-linux-gnu"
 // DEBIAN_X86_64_M32-SAME: {{^}} "-L[[SYSROOT]]/usr/lib/../lib32"
 // DEBIAN_X86_64_M32-SAME: {{^}} "-L[[SYSROOT]]/lib"
 // DEBIAN_X86_64_M32-SAME: {{^}} "-L[[SYSROOT]]/usr/lib"
 
 /// Test native GCC installation on Debian i386.
 // RUN: %clang -### %s --target=i686-linux-gnu --sysroot=%S/Inputs/debian_i386_tree \
 // RUN:   -ccc-install-dir %S/Inputs/basic_linux_tree/usr/bin -resource-dir=%S/Inputs/resource_dir \
-// RUN:   --stdlib=platform --rtlib=platform 2>&1 | FileCheck %s --check-prefix=DEBIAN_I686
+// RUN:   --stdlib=platform --rtlib=platform --unwindlib=platform 2>&1 | FileCheck %s --check-prefix=DEBIAN_I686
 // DEBIAN_I686:      "-resource-dir" "[[RESOURCE:[^"]+]]"
 // DEBIAN_I686:      "-internal-isystem"
 // DEBIAN_I686-SAME: {{^}} "[[SYSROOT:[^"]+]]/usr/lib/gcc/i686-linux-gnu/10/../../../../include/c++/10"
 /// Debian specific - the path component after 'include' is i386-linux-gnu even
 /// though the installation is i686-linux-gnu.
 // DEBIAN_I686-SAME: {{^}} "-internal-isystem" "[[SYSROOT:[^"]+]]/usr/lib/gcc/i686-linux-gnu/10/../../../../include/i386-linux-gnu/c++/10"
 // DEBIAN_I686-SAME: {{^}} "-internal-isystem" "[[SYSROOT:[^"]+]]/usr/lib/gcc/i686-linux-gnu/10/../../../../include/c++/10/backward"
 // DEBIAN_I686-SAME: {{^}} "-internal-isystem" "[[RESOURCE]]/include"
 // DEBIAN_I686-SAME: {{^}} "-internal-isystem" "[[SYSROOT]]/usr/local/include"
 /// This resolves to /usr/i686-linux-gnu/include. Because it does not exist,
 /// having it does no harm albeit not ideal.
 // DEBIAN_I686-SAME: {{^}} "-internal-isystem" "[[SYSROOT:[^"]+]]/usr/lib/gcc/i686-linux-gnu/10/../../../../i686-linux-gnu/include"
 // DEBIAN_I686:      "-internal-externc-isystem"
 // DEBIAN_I686-SAME: {{^}} "[[SYSROOT]]/usr/include/i386-linux-gnu"
 // DEBIAN_I686:      "-L
 // DEBIAN_I686-SAME: {{^}}[[SYSROOT]]/usr/lib/gcc/i686-linux-gnu/10"
 // DEBIAN_I686-SAME: {{^}} "-L[[SYSROOT]]/lib/i386-linux-gnu"
 // DEBIAN_I686-SAME: {{^}} "-L[[SYSROOT]]/usr/lib/i386-linux-gnu"
 // DEBIAN_I686-SAME: {{^}} "-L[[SYSROOT]]/lib"
 // DEBIAN_I686-SAME: {{^}} "-L[[SYSROOT]]/usr/lib"
 
 /// Test -m64 on Debian i386.
 // RUN: %clang -### %s --target=i686-linux-gnu --sysroot=%S/Inputs/debian_i386_tree -m64 \
 // RUN:   -ccc-install-dir %S/Inputs/basic_linux_tree/usr/bin -resource-dir=%S/Inputs/resource_dir \
-// RUN:   --stdlib=platform --rtlib=platform 2>&1 | FileCheck %s --check-prefix=DEBIAN_I686_M64
+// RUN:   --stdlib=platform --rtlib=platform --unwindlib=platform 2>&1 | FileCheck %s --check-prefix=DEBIAN_I686_M64
 // DEBIAN_I686_M64:      "-resource-dir" "[[RESOURCE:[^"]+]]"
 // DEBIAN_I686_M64:      "-internal-isystem"
 // DEBIAN_I686_M64-SAME: {{^}} "[[SYSROOT:[^"]+]]/usr/lib/gcc/i686-linux-gnu/10/../../../../include/c++/10"
 /// Debian specific - the path component after 'include' is i386-linux-gnu even
 /// though the installation is i686-linux-gnu.
 // DEBIAN_I686_M64-SAME: {{^}} "-internal-isystem" "[[SYSROOT:[^"]+]]/usr/lib/gcc/i686-linux-gnu/10/../../../../include/i386-linux-gnu/c++/10/64"
 // DEBIAN_I686_M64-SAME: {{^}} "-internal-isystem" "[[SYSROOT:[^"]+]]/usr/lib/gcc/i686-linux-gnu/10/../../../../include/c++/10/backward"
 // DEBIAN_I686_M64-SAME: {{^}} "-internal-isystem" "[[RESOURCE]]/include"

 // DEBIAN_I686_M64-SAME: {{^}} "-L[[SYSROOT]]/usr/lib/x86_64-linux-gnu"
 // DEBIAN_I686_M64-SAME: {{^}} "-L[[SYSROOT]]/usr/lib/../lib64"
 // DEBIAN_I686_M64-SAME: {{^}} "-L[[SYSROOT]]/lib"
 // DEBIAN_I686_M64-SAME: {{^}} "-L[[SYSROOT]]/usr/lib"
 
 /// Test a cross compiler.
 // RUN: %clang -### %s --target=aarch64-linux-gnu --sysroot=%S/Inputs/debian_multiarch_tree \
 // RUN:   -ccc-install-dir %S/Inputs/basic_linux_tree/usr/bin -resource-dir=%S/Inputs/resource_dir \
-// RUN:   --stdlib=platform --rtlib=platform 2>&1 | FileCheck %s --check-prefix=DEBIAN_AARCH64
+// RUN:   --stdlib=platform --rtlib=platform --unwindlib=platform 2>&1 | FileCheck %s --check-prefix=DEBIAN_AARCH64
 // DEBIAN_AARCH64:      "-resource-dir" "[[RESOURCE:[^"]+]]"
 // DEBIAN_AARCH64:      "-internal-isystem"
 // DEBIAN_AARCH64-SAME: {{^}} "[[SYSROOT:[^"]+]]/usr/lib/gcc-cross/aarch64-linux-gnu/10/../../../../aarch64-linux-gnu/include/c++/10"
 // DEBIAN_AARCH64-SAME: {{^}} "-internal-isystem" "[[SYSROOT:[^"]+]]/usr/lib/gcc-cross/aarch64-linux-gnu/10/../../../../aarch64-linux-gnu/include/c++/10/aarch64-linux-gnu"
 // DEBIAN_AARCH64-SAME: {{^}} "-internal-isystem" "[[SYSROOT:[^"]+]]/usr/lib/gcc-cross/aarch64-linux-gnu/10/../../../../aarch64-linux-gnu/include/c++/10/backward"
 // DEBIAN_AARCH64-SAME: {{^}} "-internal-isystem" "[[RESOURCE]]/include"
 // DEBIAN_AARCH64-SAME: {{^}} "-internal-isystem" "[[SYSROOT]]/usr/local/include"
 // DEBIAN_AARCH64-SAME: {{^}} "-internal-isystem" "[[SYSROOT:[^"]+]]/usr/lib/gcc-cross/aarch64-linux-gnu/10/../../../../aarch64-linux-gnu/include"

 // DEBIAN_X86_64_M32_PER_TARGET-SAME: {{^}} "-L[[SYSROOT]]/lib/../lib32"
 // DEBIAN_X86_64_M32_PER_TARGET-SAME: {{^}} "-L[[SYSROOT]]/usr/lib/i386-linux-gnu"
 // DEBIAN_X86_64_M32_PER_TARGET-SAME: {{^}} "-L[[SYSROOT]]/usr/lib/../lib32"
 // DEBIAN_X86_64_M32_PER_TARGET-SAME: {{^}} "-L[[SYSROOT]]/lib"
 // DEBIAN_X86_64_M32_PER_TARGET-SAME: {{^}} "-L[[SYSROOT]]/usr/lib"
 
 /// LDSO_ARCH is i386 for all x86-32 variants.
 // RUN: %clang -### %s --target=i686-linux-musl --sysroot= \
-// RUN:   --stdlib=platform --rtlib=platform 2>&1 | FileCheck %s --check-prefix=MUSL_I686
+// RUN:   --stdlib=platform --rtlib=platform --unwindlib=platform 2>&1 | FileCheck %s --check-prefix=MUSL_I686
 // MUSL_I686: "-dynamic-linker" "/lib/ld-musl-i386.so.1"
 
 // RUN: %clang -### %s --target=x86_64-linux-muslx32 --sysroot= \
-// RUN:   --stdlib=platform --rtlib=platform 2>&1 | FileCheck %s --check-prefix=MUSL_X32
+// RUN:   --stdlib=platform --rtlib=platform --unwindlib=platform 2>&1 | FileCheck %s --check-prefix=MUSL_X32
 // RUN: %clang -### %s --target=i686-linux-musl -mx32 --sysroot= \
-// RUN:   --stdlib=platform --rtlib=platform 2>&1 | FileCheck %s --check-prefix=MUSL_X32
+// RUN:   --stdlib=platform --rtlib=platform --unwindlib=platform 2>&1 | FileCheck %s --check-prefix=MUSL_X32
 // MUSL_X32: "-dynamic-linker" "/lib/ld-musl-x32.so.1"
 
 /// -r suppresses -dynamic-linker, default -l, and crt*.o like -nostdlib.
 // RUN: %clang -### %s --target=x86_64-linux-gnu --sysroot=%S/Inputs/debian_multiarch_tree \
 // RUN:   -ccc-install-dir %S/Inputs/basic_linux_tree/usr/bin -resource-dir=%S/Inputs/resource_dir \
 // RUN:   --stdlib=platform --rtlib=platform -r 2>&1 | FileCheck %s --check-prefix=RELOCATABLE
 // RELOCATABLE-NOT:  "-dynamic-linker"
 // RELOCATABLE:      "-internal-isystem"
 // RELOCATABLE-SAME: {{^}} "[[SYSROOT:[^"]+]]/usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10"
 // RELOCATABLE:      "-L
 // RELOCATABLE-SAME: {{^}}[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/10"
 // RELOCATABLE-NOT:  "-l
 // RELOCATABLE-NOT:  crt{{[^./]+}}.o

clang/test/Driver/linux-ld.c

 // UNSUPPORTED: system-windows
 // General tests that ld invocations on Linux targets sane. Note that we use
 // sysroot to make these tests independent of the host system.
 //
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=i386-unknown-linux -rtlib=platform \
+// RUN:     --target=i386-unknown-linux -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/basic_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-LD-32 %s
 // CHECK-LD-32-NOT: warning:
 // CHECK-LD-32: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-LD-32: "{{.*}}/usr/lib/gcc/i386-unknown-linux/10.2.0{{/|\\\\}}crtbegin.o"
 // CHECK-LD-32: "-L[[SYSROOT]]/usr/lib/gcc/i386-unknown-linux/10.2.0"
 // CHECK-LD-32: "-L[[SYSROOT]]/usr/lib/gcc/i386-unknown-linux/10.2.0/../../../../i386-unknown-linux/lib"

 // RUN: %clang -### %s 2>&1 \
 // RUN:     --target=x86_64-unknown-linux -rtlib=platform --unwindlib=platform \
 // RUN:     -static-libgcc -static \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/basic_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-LD-64-STATIC %s
 //
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=i386-unknown-linux -rtlib=platform -m32 \
+// RUN:     --target=i386-unknown-linux -rtlib=platform --unwindlib=platform -m32 \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/multilib_32bit_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-32-TO-32 %s
 // CHECK-32-TO-32: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-32-TO-32: "{{.*}}/usr/lib/gcc/i386-unknown-linux/10.2.0{{/|\\\\}}crtbegin.o"
 // CHECK-32-TO-32: "-L[[SYSROOT]]/usr/lib/gcc/i386-unknown-linux/10.2.0"
 // CHECK-32-TO-32: "-L[[SYSROOT]]/usr/lib/gcc/i386-unknown-linux/10.2.0/../../../../i386-unknown-linux/lib/../lib32"
 // CHECK-32-TO-32: "-L[[SYSROOT]]/usr/lib/gcc/i386-unknown-linux/10.2.0/../../../../lib32"
 // CHECK-32-TO-32: "-L[[SYSROOT]]/lib/../lib32"
 // CHECK-32-TO-32: "-L[[SYSROOT]]/usr/lib/../lib32"
 // CHECK-32-TO-32: "-L[[SYSROOT]]/usr/lib/gcc/i386-unknown-linux/10.2.0/../../../../i386-unknown-linux/lib"
 // CHECK-32-TO-32: "-L[[SYSROOT]]/lib"
 // CHECK-32-TO-32: "-L[[SYSROOT]]/usr/lib"
 //
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=i386-unknown-linux -rtlib=platform -m64 \
+// RUN:     --target=i386-unknown-linux -rtlib=platform --unwindlib=platform -m64 \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/multilib_32bit_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-32-TO-64 %s
 // CHECK-32-TO-64: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-32-TO-64: "{{.*}}/usr/lib/gcc/i386-unknown-linux/10.2.0/64{{/|\\\\}}crtbegin.o"
 // CHECK-32-TO-64: "-L[[SYSROOT]]/usr/lib/gcc/i386-unknown-linux/10.2.0/64"
 // CHECK-32-TO-64: "-L[[SYSROOT]]/usr/lib/gcc/i386-unknown-linux/10.2.0/../../../../i386-unknown-linux/lib/../lib64"
 // CHECK-32-TO-64: "-L[[SYSROOT]]/usr/lib/gcc/i386-unknown-linux/10.2.0/../../../../lib64"
 // CHECK-32-TO-64: "-L[[SYSROOT]]/lib/../lib64"
 // CHECK-32-TO-64: "-L[[SYSROOT]]/usr/lib/../lib64"
 // CHECK-32-TO-64: "-L[[SYSROOT]]/usr/lib/gcc/i386-unknown-linux/10.2.0/../../../../i386-unknown-linux/lib"
 // CHECK-32-TO-64: "-L[[SYSROOT]]/lib"
 // CHECK-32-TO-64: "-L[[SYSROOT]]/usr/lib"
 //
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=x86_64-unknown-linux -rtlib=platform -m64 \
+// RUN:     --target=x86_64-unknown-linux -rtlib=platform --unwindlib=platform -m64 \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/multilib_64bit_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-64-TO-64 %s
 // CHECK-64-TO-64: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-64-TO-64: "{{.*}}/usr/lib/gcc/x86_64-unknown-linux/10.2.0{{/|\\\\}}crtbegin.o"
 // CHECK-64-TO-64: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0"
 // CHECK-64-TO-64: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0/../../../../x86_64-unknown-linux/lib/../lib64"
 // CHECK-64-TO-64: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0/../../../../lib64"
 // CHECK-64-TO-64: "-L[[SYSROOT]]/lib/../lib64"
 // CHECK-64-TO-64: "-L[[SYSROOT]]/usr/lib/../lib64"
 // CHECK-64-TO-64: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0/../../../../x86_64-unknown-linux/lib"
 // CHECK-64-TO-64: "-L[[SYSROOT]]/lib"
 // CHECK-64-TO-64: "-L[[SYSROOT]]/usr/lib"
 //
 // RUN: not %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=x86_64-unknown-linux -rtlib=plaform -m32 \
+// RUN:     --target=x86_64-unknown-linux -rtlib=plaform --unwindlib=platform -m32 \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/multilib_64bit_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-64-TO-32 %s
 // CHECK-64-TO-32: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-64-TO-32: "{{.*}}/usr/lib/gcc/x86_64-unknown-linux/10.2.0/32{{/|\\\\}}crtbegin.o"
 // CHECK-64-TO-32: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0/32"
 // CHECK-64-TO-32: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0/../../../../x86_64-unknown-linux/lib/../lib32"
 // CHECK-64-TO-32: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0/../../../../lib32"
 // CHECK-64-TO-32: "-L[[SYSROOT]]/lib/../lib32"
 // CHECK-64-TO-32: "-L[[SYSROOT]]/usr/lib/../lib32"
 // CHECK-64-TO-32: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0/../../../../x86_64-unknown-linux/lib"
 // CHECK-64-TO-32: "-L[[SYSROOT]]/lib"
 // CHECK-64-TO-32: "-L[[SYSROOT]]/usr/lib"
 //
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=x86_64-unknown-linux-gnux32 -rtlib=platform \
+// RUN:     --target=x86_64-unknown-linux-gnux32 -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/multilib_64bit_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-X32 %s
 // CHECK-X32: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-X32: "{{.*}}/usr/lib/gcc/x86_64-unknown-linux/10.2.0/x32{{/|\\\\}}crtbegin.o"
 // CHECK-X32: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0/x32"
 // CHECK-X32: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0/../../../../x86_64-unknown-linux/lib/../libx32"
 // CHECK-X32: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0/../../../../libx32"
 // CHECK-X32: "-L[[SYSROOT]]/lib/../libx32"
 // CHECK-X32: "-L[[SYSROOT]]/usr/lib/../libx32"
 // CHECK-X32: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0/../../../../x86_64-unknown-linux/lib"
 // CHECK-X32: "-L[[SYSROOT]]/lib"
 // CHECK-X32: "-L[[SYSROOT]]/usr/lib"
 //
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=x86_64-unknown-linux -rtlib=platform -mx32 \
+// RUN:     --target=x86_64-unknown-linux -rtlib=platform --unwindlib=platform -mx32 \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/multilib_64bit_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-64-TO-X32 %s
 // CHECK-64-TO-X32: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-64-TO-X32: "{{.*}}/usr/lib/gcc/x86_64-unknown-linux/10.2.0/x32{{/|\\\\}}crtbegin.o"
 // CHECK-64-TO-X32: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0/x32"
 // CHECK-64-TO-X32: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0/../../../../x86_64-unknown-linux/lib/../libx32"
 // CHECK-64-TO-X32: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0/../../../../libx32"
 // CHECK-64-TO-X32: "-L[[SYSROOT]]/lib/../libx32"
 // CHECK-64-TO-X32: "-L[[SYSROOT]]/usr/lib/../libx32"
 // CHECK-64-TO-X32: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0/../../../../x86_64-unknown-linux/lib"
 // CHECK-64-TO-X32: "-L[[SYSROOT]]/lib"
 // CHECK-64-TO-X32: "-L[[SYSROOT]]/usr/lib"
 //
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=i386-unknown-linux -rtlib=platform -mx32 \
+// RUN:     --target=i386-unknown-linux -rtlib=platform --unwindlib=platform -mx32 \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/multilib_64bit_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-32-TO-X32 %s
 // CHECK-32-TO-X32: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-32-TO-X32: "{{.*}}/usr/lib/gcc/x86_64-unknown-linux/10.2.0/x32{{/|\\\\}}crtbegin.o"
 // CHECK-32-TO-X32: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0/x32"
 // CHECK-32-TO-X32: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0/../../../../x86_64-unknown-linux/lib/../libx32"
 // CHECK-32-TO-X32: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0/../../../../libx32"
 // CHECK-32-TO-X32: "-L[[SYSROOT]]/lib/../libx32"
 // CHECK-32-TO-X32: "-L[[SYSROOT]]/usr/lib/../libx32"
 // CHECK-32-TO-X32: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0/../../../../x86_64-unknown-linux/lib"
 // CHECK-32-TO-X32: "-L[[SYSROOT]]/lib"
 // CHECK-32-TO-X32: "-L[[SYSROOT]]/usr/lib"
 //
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=x86_64-unknown-linux-gnux32 -rtlib=platform -m64 \
+// RUN:     --target=x86_64-unknown-linux-gnux32 -rtlib=platform --unwindlib=platform -m64 \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/multilib_64bit_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-X32-TO-64 %s
 // CHECK-X32-TO-64: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-X32-TO-64: "{{.*}}/usr/lib/gcc/x86_64-unknown-linux/10.2.0{{/|\\\\}}crtbegin.o"
 // CHECK-X32-TO-64: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0"
 // CHECK-X32-TO-64: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0/../../../../x86_64-unknown-linux/lib/../lib64"
 // CHECK-X32-TO-64: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0/../../../../lib64"
 // CHECK-X32-TO-64: "-L[[SYSROOT]]/lib/../lib64"
 // CHECK-X32-TO-64: "-L[[SYSROOT]]/usr/lib/../lib64"
 // CHECK-X32-TO-64: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0/../../../../x86_64-unknown-linux/lib"
 // CHECK-X32-TO-64: "-L[[SYSROOT]]/lib"
 // CHECK-X32-TO-64: "-L[[SYSROOT]]/usr/lib"
 //
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=x86_64-unknown-linux-gnux32 -rtlib=platform -m32 \
+// RUN:     --target=x86_64-unknown-linux-gnux32 -rtlib=platform --unwindlib=platform -m32 \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/multilib_64bit_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-X32-TO-32 %s
 // CHECK-X32-TO-32: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-X32-TO-32: "{{.*}}/usr/lib/gcc/x86_64-unknown-linux/10.2.0/32{{/|\\\\}}crtbegin.o"
 // CHECK-X32-TO-32: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0/32"
 // CHECK-X32-TO-32: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0/../../../../x86_64-unknown-linux/lib/../lib32"
 // CHECK-X32-TO-32: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0/../../../../lib32"
 // CHECK-X32-TO-32: "-L[[SYSROOT]]/lib/../lib32"
 // CHECK-X32-TO-32: "-L[[SYSROOT]]/usr/lib/../lib32"
 // CHECK-X32-TO-32: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-unknown-linux/10.2.0/../../../../x86_64-unknown-linux/lib"
 // CHECK-X32-TO-32: "-L[[SYSROOT]]/lib"
 // CHECK-X32-TO-32: "-L[[SYSROOT]]/usr/lib"
 //
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=x86_64-unknown-linux -rtlib=platform -m32 \
+// RUN:     --target=x86_64-unknown-linux -rtlib=platform --unwindlib=platform -m32 \
 // RUN:     --gcc-toolchain=%S/Inputs/multilib_64bit_linux_tree/usr \
 // RUN:     --sysroot=%S/Inputs/multilib_32bit_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-64-TO-32-SYSROOT %s
 // CHECK-64-TO-32-SYSROOT: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-64-TO-32-SYSROOT: "{{.*}}/usr/lib/gcc/x86_64-unknown-linux/10.2.0/32{{/|\\\\}}crtbegin.o"
 // CHECK-64-TO-32-SYSROOT: "-L{{[^"]*}}/Inputs/multilib_64bit_linux_tree/usr/lib/gcc/x86_64-unknown-linux/10.2.0/32"
 // CHECK-64-TO-32-SYSROOT: "-L[[SYSROOT]]/lib/../lib32"
 // CHECK-64-TO-32-SYSROOT: "-L[[SYSROOT]]/usr/lib/../lib32"
 // CHECK-64-TO-32-SYSROOT: "-L[[SYSROOT]]/lib"
 // CHECK-64-TO-32-SYSROOT: "-L[[SYSROOT]]/usr/lib"
 //
 // Check that we support unusual patch version formats, including missing that
 // component.
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=i386-unknown-linux -rtlib=platform -m32 \
+// RUN:     --target=i386-unknown-linux -rtlib=platform --unwindlib=platform -m32 \
 // RUN:     -ccc-install-dir %S/Inputs/gcc_version_parsing1/bin \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/basic_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-GCC-VERSION1 %s
 // CHECK-GCC-VERSION1: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-GCC-VERSION1: "{{.*}}/Inputs/basic_linux_tree/usr/lib/gcc/i386-unknown-linux/10.2.0{{/|\\\\}}crtbegin.o"
 
 // Test a simulated installation of libc++ on Linux, both through sysroot and

 // CHECK-BASIC-LIBCXX-C-LINK: "-cc1"
 // CHECK-BASIC-LIBCXX-C-LINK: "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-BASIC-LIBCXX-C-LINK-NOT: "-internal-isystem" "[[SYSROOT]]/usr/bin/../include/c++/v1"
 // CHECK-BASIC-LIBCXX-C-LINK: "-internal-isystem" "[[SYSROOT]]/usr/local/include"
 // CHECK-BASIC-LIBCXX-C-LINK: "--sysroot=[[SYSROOT]]"
 //
 // Check multi arch support on Ubuntu 12.04 LTS.
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=arm-unknown-linux-gnueabihf -rtlib=platform \
+// RUN:     --target=arm-unknown-linux-gnueabihf -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/ubuntu_12.04_LTS_multiarch_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-UBUNTU-12-04-ARM-HF %s
 // CHECK-UBUNTU-12-04-ARM-HF: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-UBUNTU-12-04-ARM-HF: "{{.*}}/usr/lib/arm-linux-gnueabihf{{/|\\\\}}crt1.o"
 // CHECK-UBUNTU-12-04-ARM-HF: "{{.*}}/usr/lib/arm-linux-gnueabihf{{/|\\\\}}crti.o"
 // CHECK-UBUNTU-12-04-ARM-HF: "{{.*}}/usr/lib/gcc/arm-linux-gnueabihf/4.6.3{{/|\\\\}}crtbegin.o"
 // CHECK-UBUNTU-12-04-ARM-HF: "-L[[SYSROOT]]/usr/lib/gcc/arm-linux-gnueabihf/4.6.3"
 // CHECK-UBUNTU-12-04-ARM-HF: "-L[[SYSROOT]]/lib/arm-linux-gnueabihf"
 // CHECK-UBUNTU-12-04-ARM-HF: "-L[[SYSROOT]]/usr/lib/arm-linux-gnueabihf"
 // CHECK-UBUNTU-12-04-ARM-HF: "{{.*}}/usr/lib/gcc/arm-linux-gnueabihf/4.6.3{{/|\\\\}}crtend.o"
 // CHECK-UBUNTU-12-04-ARM-HF: "{{.*}}/usr/lib/arm-linux-gnueabihf{{/|\\\\}}crtn.o"
 //
 // Check Ubuntu 13.10 on x86-64 targeting arm-linux-gnueabihf.
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=arm-linux-gnueabihf -rtlib=platform \
+// RUN:     --target=arm-linux-gnueabihf -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/x86-64_ubuntu_13.10 \
 // RUN:   | FileCheck --check-prefix=CHECK-X86-64-UBUNTU-13-10-ARM-HF %s
 // CHECK-X86-64-UBUNTU-13-10-ARM-HF: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-X86-64-UBUNTU-13-10-ARM-HF: "-dynamic-linker" "{{(/usr/arm--linux-gnueabihf)?}}/lib/ld-linux-armhf.so.3"
 // CHECK-X86-64-UBUNTU-13-10-ARM-HF: "{{.*}}/usr/lib/gcc-cross/arm-linux-gnueabihf/4.8/../../../../arm-linux-gnueabihf/lib/../lib{{/|\\\\}}crt1.o"
 // CHECK-X86-64-UBUNTU-13-10-ARM-HF: "{{.*}}/usr/lib/gcc-cross/arm-linux-gnueabihf/4.8/../../../../arm-linux-gnueabihf/lib/../lib{{/|\\\\}}crti.o"
 // CHECK-X86-64-UBUNTU-13-10-ARM-HF: "{{.*}}/usr/lib/gcc-cross/arm-linux-gnueabihf/4.8{{/|\\\\}}crtbegin.o"
 // CHECK-X86-64-UBUNTU-13-10-ARM-HF: "-L[[SYSROOT]]/usr/lib/gcc-cross/arm-linux-gnueabihf/4.8"
 // CHECK-X86-64-UBUNTU-13-10-ARM-HF: "-L[[SYSROOT]]/usr/lib/gcc-cross/arm-linux-gnueabihf/4.8/../../../../arm-linux-gnueabihf/lib/../lib"
 // CHECK-X86-64-UBUNTU-13-10-ARM-HF: "-L[[SYSROOT]]/lib/../lib"
 // CHECK-X86-64-UBUNTU-13-10-ARM-HF: "-L[[SYSROOT]]/usr/lib/../lib"
 // CHECK-X86-64-UBUNTU-13-10-ARM-HF: "-L[[SYSROOT]]/usr/lib/gcc-cross/arm-linux-gnueabihf/4.8/../../../../arm-linux-gnueabihf/lib"
 // CHECK-X86-64-UBUNTU-13-10-ARM-HF: "{{.*}}/usr/lib/gcc-cross/arm-linux-gnueabihf/4.8{{/|\\\\}}crtend.o"
 // CHECK-X86-64-UBUNTU-13-10-ARM-HF: "{{.*}}/usr/lib/gcc-cross/arm-linux-gnueabihf/4.8/../../../../arm-linux-gnueabihf/lib/../lib{{/|\\\\}}crtn.o"
 //
 // Check Ubuntu 13.10 on x86-64 targeting arm-linux-gnueabi.
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=arm-linux-gnueabi -rtlib=platform \
+// RUN:     --target=arm-linux-gnueabi -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/x86-64_ubuntu_13.10 \
 // RUN:   | FileCheck --check-prefix=CHECK-X86-64-UBUNTU-13-10-ARM %s
 // CHECK-X86-64-UBUNTU-13-10-ARM: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-X86-64-UBUNTU-13-10-ARM: "-dynamic-linker" "{{(/usr/arm--linux-gnueabi)?}}/lib/ld-linux.so.3"
 // CHECK-X86-64-UBUNTU-13-10-ARM: "{{.*}}/usr/lib/gcc-cross/arm-linux-gnueabi/4.7/../../../../arm-linux-gnueabi/lib/../lib{{/|\\\\}}crt1.o"
 // CHECK-X86-64-UBUNTU-13-10-ARM: "{{.*}}/usr/lib/gcc-cross/arm-linux-gnueabi/4.7/../../../../arm-linux-gnueabi/lib/../lib{{/|\\\\}}crti.o"
 // CHECK-X86-64-UBUNTU-13-10-ARM: "{{.*}}/usr/lib/gcc-cross/arm-linux-gnueabi/4.7{{/|\\\\}}crtbegin.o"
 // CHECK-X86-64-UBUNTU-13-10-ARM: "-L[[SYSROOT]]/usr/lib/gcc-cross/arm-linux-gnueabi/4.7"
 // CHECK-X86-64-UBUNTU-13-10-ARM: "-L[[SYSROOT]]/usr/lib/gcc-cross/arm-linux-gnueabi/4.7/../../../../arm-linux-gnueabi/lib/../lib"
 // CHECK-X86-64-UBUNTU-13-10-ARM: "-L[[SYSROOT]]/lib/../lib"
 // CHECK-X86-64-UBUNTU-13-10-ARM: "-L[[SYSROOT]]/usr/lib/../lib"
 // CHECK-X86-64-UBUNTU-13-10-ARM: "-L[[SYSROOT]]/usr/lib/gcc-cross/arm-linux-gnueabi/4.7/../../../../arm-linux-gnueabi/lib"
 // CHECK-X86-64-UBUNTU-13-10-ARM: "{{.*}}/usr/lib/gcc-cross/arm-linux-gnueabi/4.7{{/|\\\\}}crtend.o"
 // CHECK-X86-64-UBUNTU-13-10-ARM: "{{.*}}/usr/lib/gcc-cross/arm-linux-gnueabi/4.7/../../../../arm-linux-gnueabi/lib/../lib{{/|\\\\}}crtn.o"
 //
 // Check Ubuntu 14.04 on powerpc64le.
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=powerpc64le-unknown-linux-gnu -rtlib=platform \
+// RUN:     --target=powerpc64le-unknown-linux-gnu -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/ubuntu_14.04_multiarch_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-UBUNTU-14-04-PPC64LE %s
 // CHECK-UBUNTU-14-04-PPC64LE: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-UBUNTU-14-04-PPC64LE: "{{.*}}/usr/lib/powerpc64le-linux-gnu{{/|\\\\}}crt1.o"
 // CHECK-UBUNTU-14-04-PPC64LE: "{{.*}}/usr/lib/powerpc64le-linux-gnu{{/|\\\\}}crti.o"
 // CHECK-UBUNTU-14-04-PPC64LE: "{{.*}}/usr/lib/gcc/powerpc64le-linux-gnu/4.8{{/|\\\\}}crtbegin.o"
 // CHECK-UBUNTU-14-04-PPC64LE: "-L[[SYSROOT]]/usr/lib/gcc/powerpc64le-linux-gnu/4.8"
 // CHECK-UBUNTU-14-04-PPC64LE: "-L[[SYSROOT]]/lib/powerpc64le-linux-gnu"
 // CHECK-UBUNTU-14-04-PPC64LE: "-L[[SYSROOT]]/usr/lib/powerpc64le-linux-gnu"
 // CHECK-UBUNTU-14-04-PPC64LE: "{{.*}}/usr/lib/gcc/powerpc64le-linux-gnu/4.8{{/|\\\\}}crtend.o"
 // CHECK-UBUNTU-14-04-PPC64LE: "{{.*}}/usr/lib/powerpc64le-linux-gnu{{/|\\\\}}crtn.o"
 //
 // Check Ubuntu 14.04 on x32.
 // "/usr/lib/gcc/x86_64-linux-gnu/4.8/x32/crtend.o" "/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../libx32/crtn.o"
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=x86_64-unknown-linux-gnux32 -rtlib=platform \
+// RUN:     --target=x86_64-unknown-linux-gnux32 -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/ubuntu_14.04_multiarch_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-UBUNTU-14-04-X32 %s
 // CHECK-UBUNTU-14-04-X32: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-UBUNTU-14-04-X32: "{{.*}}/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../libx32{{/|\\\\}}crt1.o"
 // CHECK-UBUNTU-14-04-X32: "{{.*}}/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../libx32{{/|\\\\}}crti.o"
 // CHECK-UBUNTU-14-04-X32: "{{.*}}/usr/lib/gcc/x86_64-linux-gnu/4.8/x32{{/|\\\\}}crtbegin.o"
 // CHECK-UBUNTU-14-04-X32: "-L[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/4.8/x32"
 // CHECK-UBUNTU-14-04-X32-SAME: {{^}} "-L[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../libx32"
 // CHECK-UBUNTU-14-04-X32-SAME: {{^}} "-L[[SYSROOT]]/lib/../libx32"
 // CHECK-UBUNTU-14-04-X32-SAME: {{^}} "-L[[SYSROOT]]/usr/lib/../libx32"
 // CHECK-UBUNTU-14-04-X32: "{{.*}}/usr/lib/gcc/x86_64-linux-gnu/4.8/x32{{/|\\\\}}crtend.o"
 // CHECK-UBUNTU-14-04-X32: "{{.*}}/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../libx32{{/|\\\\}}crtn.o"
 //
 // Check fedora 18 on arm.
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=armv7-unknown-linux-gnueabihf -rtlib=platform \
+// RUN:     --target=armv7-unknown-linux-gnueabihf -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/fedora_18_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-FEDORA-18-ARM-HF %s
 // CHECK-FEDORA-18-ARM-HF: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-FEDORA-18-ARM-HF: "{{.*}}/usr/lib/gcc/armv7hl-redhat-linux-gnueabi/4.7.2/../../../../lib{{/|\\\\}}crt1.o"
 // CHECK-FEDORA-18-ARM-HF: "{{.*}}/usr/lib/gcc/armv7hl-redhat-linux-gnueabi/4.7.2/../../../../lib{{/|\\\\}}crti.o"
 // CHECK-FEDORA-18-ARM-HF: "{{.*}}/usr/lib/gcc/armv7hl-redhat-linux-gnueabi/4.7.2{{/|\\\\}}crtbegin.o"
 // CHECK-FEDORA-18-ARM-HF: "-L[[SYSROOT]]/usr/lib/gcc/armv7hl-redhat-linux-gnueabi/4.7.2"
 // CHECK-FEDORA-18-ARM-HF: "-L[[SYSROOT]]/usr/lib/gcc/armv7hl-redhat-linux-gnueabi/4.7.2/../../../../lib"
 // CHECK-FEDORA-18-ARM-HF: "{{.*}}/usr/lib/gcc/armv7hl-redhat-linux-gnueabi/4.7.2{{/|\\\\}}crtend.o"
 // CHECK-FEDORA-18-ARM-HF: "{{.*}}/usr/lib/gcc/armv7hl-redhat-linux-gnueabi/4.7.2/../../../../lib{{/|\\\\}}crtn.o"
 //
 // Check Fedora 21 on AArch64.
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=arm64-unknown-linux-gnu -rtlib=platform \
+// RUN:     --target=arm64-unknown-linux-gnu -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/fedora_21_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-FEDORA-21-AARCH64 %s
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=aarch64-unknown-linux-gnu -rtlib=platform \
+// RUN:     --target=aarch64-unknown-linux-gnu -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/fedora_21_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-FEDORA-21-AARCH64 %s
 // CHECK-FEDORA-21-AARCH64: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-FEDORA-21-AARCH64: "{{.*}}/usr/lib/gcc/aarch64-redhat-linux/4.9.0/../../../../lib64{{/|\\\\}}crt1.o"
 // CHECK-FEDORA-21-AARCH64: "{{.*}}/usr/lib/gcc/aarch64-redhat-linux/4.9.0/../../../../lib64{{/|\\\\}}crti.o"
 // CHECK-FEDORA-21-AARCH64: "{{.*}}/usr/lib/gcc/aarch64-redhat-linux/4.9.0{{/|\\\\}}crtbegin.o"
 // CHECK-FEDORA-21-AARCH64: "-L[[SYSROOT]]/usr/lib/gcc/aarch64-redhat-linux/4.9.0"
 // CHECK-FEDORA-21-AARCH64: "-L[[SYSROOT]]/usr/lib/gcc/aarch64-redhat-linux/4.9.0/../../../../lib64"
 // CHECK-FEDORA-21-AARCH64: "{{.*}}/usr/lib/gcc/aarch64-redhat-linux/4.9.0{{/|\\\\}}crtend.o"
 // CHECK-FEDORA-21-AARCH64: "{{.*}}/usr/lib/gcc/aarch64-redhat-linux/4.9.0/../../../../lib64{{/|\\\\}}crtn.o"
 //
 // Check Fedora 31 on riscv64.
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=riscv64-redhat-linux -rtlib=platform \
+// RUN:     --target=riscv64-redhat-linux -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/fedora_31_riscv64_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-FEDORA-31-RISCV64 %s
 // CHECK-FEDORA-31-RISCV64: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-FEDORA-31-RISCV64: "{{.*}}/usr/lib/gcc/riscv64-redhat-linux/9/../../../../lib64{{/|\\\\}}crt1.o"
 // CHECK-FEDORA-31-RISCV64: "{{.*}}/usr/lib/gcc/riscv64-redhat-linux/9{{/|\\\\}}crti.o"
 // CHECK-FEDORA-31-RISCV64: "{{.*}}/usr/lib/gcc/riscv64-redhat-linux/9{{/|\\\\}}crtbegin.o"
 // CHECK-FEDORA-31-RISCV64: "-L[[SYSROOT]]/usr/lib/gcc/riscv64-redhat-linux/9"
 // CHECK-FEDORA-31-RISCV64: "-L[[SYSROOT]]/usr/lib/gcc/riscv64-redhat-linux/9/../../../../lib64"
 // CHECK-FEDORA-31-RISCV64: "{{.*}}/usr/lib/gcc/riscv64-redhat-linux/9{{/|\\\\}}crtend.o"
 // CHECK-FEDORA-31-RISCV64: "{{.*}}/usr/lib/gcc/riscv64-redhat-linux/9{{/|\\\\}}crtn.o"
 //
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=arm-unknown-linux-gnueabi -rtlib=platform \
+// RUN:     --target=arm-unknown-linux-gnueabi -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/ubuntu_12.04_LTS_multiarch_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-UBUNTU-12-04-ARM %s
 // CHECK-UBUNTU-12-04-ARM: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-UBUNTU-12-04-ARM: "{{.*}}/usr/lib/arm-linux-gnueabi{{/|\\\\}}crt1.o"
 // CHECK-UBUNTU-12-04-ARM: "{{.*}}/usr/lib/arm-linux-gnueabi{{/|\\\\}}crti.o"
 // CHECK-UBUNTU-12-04-ARM: "{{.*}}/usr/lib/gcc/arm-linux-gnueabi/4.6.1{{/|\\\\}}crtbegin.o"
 // CHECK-UBUNTU-12-04-ARM: "-L[[SYSROOT]]/usr/lib/gcc/arm-linux-gnueabi/4.6.1"
 // CHECK-UBUNTU-12-04-ARM: "-L[[SYSROOT]]/lib/arm-linux-gnueabi"
 // CHECK-UBUNTU-12-04-ARM: "-L[[SYSROOT]]/usr/lib/arm-linux-gnueabi"
 // CHECK-UBUNTU-12-04-ARM: "{{.*}}/usr/lib/gcc/arm-linux-gnueabi/4.6.1{{/|\\\\}}crtend.o"
 // CHECK-UBUNTU-12-04-ARM: "{{.*}}/usr/lib/arm-linux-gnueabi{{/|\\\\}}crtn.o"
 //
 // Test the setup that shipped in SUSE 10.3 on ppc64.
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=powerpc64-suse-linux -rtlib=platform \
+// RUN:     --target=powerpc64-suse-linux -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/suse_10.3_ppc64_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-SUSE-10-3-PPC64 %s
 // CHECK-SUSE-10-3-PPC64: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-SUSE-10-3-PPC64: "{{.*}}/usr/lib/gcc/powerpc64-suse-linux/4.1.2/64{{/|\\\\}}crtbegin.o"
 // CHECK-SUSE-10-3-PPC64: "-L[[SYSROOT]]/usr/lib/gcc/powerpc64-suse-linux/4.1.2/64"
 // CHECK-SUSE-10-3-PPC64: "-L[[SYSROOT]]/usr/lib/gcc/powerpc64-suse-linux/4.1.2/../../../../lib64"
 // CHECK-SUSE-10-3-PPC64: "-L[[SYSROOT]]/lib/../lib64"
 // CHECK-SUSE-10-3-PPC64: "-L[[SYSROOT]]/usr/lib/../lib64"
 //
 // Check openSuse Leap 42.2 on AArch64
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=arm64-unknown-linux-gnu -rtlib=platform \
+// RUN:     --target=arm64-unknown-linux-gnu -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/opensuse_42.2_aarch64_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-OPENSUSE-42-2-AARCH64 %s
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=aarch64-unknown-linux-gnu -rtlib=platform \
+// RUN:     --target=aarch64-unknown-linux-gnu -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/opensuse_42.2_aarch64_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-OPENSUSE-42-2-AARCH64 %s
 // CHECK-OPENSUSE-42-2-AARCH64: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-OPENSUSE-42-2-AARCH64: "{{.*}}/usr/lib64/gcc/aarch64-suse-linux/4.8/../../../../lib64{{/|\\\\}}crt1.o"
 // CHECK-OPENSUSE-42-2-AARCH64: "{{.*}}/usr/lib64/gcc/aarch64-suse-linux/4.8/../../../../lib64{{/|\\\\}}crti.o"
 // CHECK-OPENSUSE-42-2-AARCH64: "{{.*}}/usr/lib64/gcc/aarch64-suse-linux/4.8{{/|\\\\}}crtbegin.o"
 // CHECK-OPENSUSE-42-2-AARCH64: "-L[[SYSROOT]]/usr/lib64/gcc/aarch64-suse-linux/4.8"
 // CHECK-OPENSUSE-42-2-AARCH64: "-L[[SYSROOT]]/usr/lib64/gcc/aarch64-suse-linux/4.8/../../../../lib64"
 // CHECK-OPENSUSE-42-2-AARCH64: "{{.*}}/usr/lib64/gcc/aarch64-suse-linux/4.8{{/|\\\\}}crtend.o"
 // CHECK-OPENSUSE-42-2-AARCH64: "{{.*}}/usr/lib64/gcc/aarch64-suse-linux/4.8/../../../../lib64{{/|\\\\}}crtn.o"
 //
 // Check openSUSE Tumbleweed on armv6hl
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=armv6hl-suse-linux-gnueabi -rtlib=platform \
+// RUN:     --target=armv6hl-suse-linux-gnueabi -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/opensuse_tumbleweed_armv6hl_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-OPENSUSE-TW-ARMV6HL %s
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=armv6hl-suse-linux-gnueabi -rtlib=platform \
+// RUN:     --target=armv6hl-suse-linux-gnueabi -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/opensuse_tumbleweed_armv6hl_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-OPENSUSE-TW-ARMV6HL %s
 // CHECK-OPENSUSE-TW-ARMV6HL: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-OPENSUSE-TW-ARMV6HL: "{{.*}}/usr/lib/gcc/armv6hl-suse-linux-gnueabi/5/../../../../lib{{/|\\\\}}crt1.o"
 // CHECK-OPENSUSE-TW-ARMV6HL: "{{.*}}/usr/lib/gcc/armv6hl-suse-linux-gnueabi/5/../../../../lib{{/|\\\\}}crti.o"
 // CHECK-OPENSUSE-TW-ARMV6HL: "{{.*}}/usr/lib/gcc/armv6hl-suse-linux-gnueabi/5{{/|\\\\}}crtbegin.o"
 // CHECK-OPENSUSE-TW-ARMV6HL: "-L[[SYSROOT]]/usr/lib/gcc/armv6hl-suse-linux-gnueabi/5"
 // CHECK-OPENSUSE-TW-ARMV6HL: "-L[[SYSROOT]]/usr/lib/gcc/armv6hl-suse-linux-gnueabi/5/../../../../lib"
 // CHECK-OPENSUSE-TW-ARMV6HL: "{{.*}}/usr/lib/gcc/armv6hl-suse-linux-gnueabi/5{{/|\\\\}}crtend.o"
 // CHECK-OPENSUSE-TW-ARMV6HL: "{{.*}}/usr/lib/gcc/armv6hl-suse-linux-gnueabi/5/../../../../lib{{/|\\\\}}crtn.o"
 //
 // Check openSUSE Tumbleweed on armv7hl
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=armv7hl-suse-linux-gnueabi -rtlib=platform \
+// RUN:     --target=armv7hl-suse-linux-gnueabi -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/opensuse_tumbleweed_armv7hl_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-OPENSUSE-TW-ARMV7HL %s
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=armv7hl-suse-linux-gnueabi -rtlib=platform \
+// RUN:     --target=armv7hl-suse-linux-gnueabi -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/opensuse_tumbleweed_armv7hl_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-OPENSUSE-TW-ARMV7HL %s
 // CHECK-OPENSUSE-TW-ARMV7HL: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-OPENSUSE-TW-ARMV7HL: "{{.*}}/usr/lib/gcc/armv7hl-suse-linux-gnueabi/5/../../../../lib{{/|\\\\}}crt1.o"
 // CHECK-OPENSUSE-TW-ARMV7HL: "{{.*}}/usr/lib/gcc/armv7hl-suse-linux-gnueabi/5/../../../../lib{{/|\\\\}}crti.o"
 // CHECK-OPENSUSE-TW-ARMV7HL: "{{.*}}/usr/lib/gcc/armv7hl-suse-linux-gnueabi/5{{/|\\\\}}crtbegin.o"
 // CHECK-OPENSUSE-TW-ARMV7HL: "-L[[SYSROOT]]/usr/lib/gcc/armv7hl-suse-linux-gnueabi/5"
 // CHECK-OPENSUSE-TW-ARMV7HL: "-L[[SYSROOT]]/usr/lib/gcc/armv7hl-suse-linux-gnueabi/5/../../../../lib"
 // CHECK-OPENSUSE-TW-ARMV7HL: "{{.*}}/usr/lib/gcc/armv7hl-suse-linux-gnueabi/5{{/|\\\\}}crtend.o"
 // CHECK-OPENSUSE-TW-ARMV7HL: "{{.*}}/usr/lib/gcc/armv7hl-suse-linux-gnueabi/5/../../../../lib{{/|\\\\}}crtn.o"
 //
 // Check openSUSE Tumbleweed on riscv64
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=riscv64-suse-linux -rtlib=platform \
+// RUN:     --target=riscv64-suse-linux -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/opensuse_tumbleweed_riscv64_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-OPENSUSE-TW-RISCV64 %s
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=riscv64-suse-linux -rtlib=platform \
+// RUN:     --target=riscv64-suse-linux -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/opensuse_tumbleweed_riscv64_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-OPENSUSE-TW-RISCV64 %s
 // CHECK-OPENSUSE-TW-RISCV64: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-OPENSUSE-TW-RISCV64: "{{.*}}/usr/lib64/gcc/riscv64-suse-linux/9/../../../../lib64{{/|\\\\}}crt1.o"
 // CHECK-OPENSUSE-TW-RISCV64: "{{.*}}/usr/lib64/gcc/riscv64-suse-linux/9/../../../../lib64{{/|\\\\}}crti.o"
 // CHECK-OPENSUSE-TW-RISCV64: "{{.*}}/usr/lib64/gcc/riscv64-suse-linux/9{{/|\\\\}}crtbegin.o"
 // CHECK-OPENSUSE-TW-RISCV64: "-L[[SYSROOT]]/usr/lib64/gcc/riscv64-suse-linux/9"
 // CHECK-OPENSUSE-TW-RISCV64: "-L[[SYSROOT]]/usr/lib64/gcc/riscv64-suse-linux/9/../../../../lib64"
 // CHECK-OPENSUSE-TW-RISCV64: "{{.*}}/usr/lib64/gcc/riscv64-suse-linux/9{{/|\\\\}}crtend.o"
 // CHECK-OPENSUSE-TW-RISCV64: "{{.*}}/usr/lib64/gcc/riscv64-suse-linux/9/../../../../lib64{{/|\\\\}}crtn.o"
 //
 // Check openSUSE Tumbleweed on ppc
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=powerpc-unknown-linux-gnu -rtlib=platform \
+// RUN:     --target=powerpc-unknown-linux-gnu -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/opensuse_tumbleweed_ppc_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-OPENSUSE-TW-PPC %s
 // CHECK-OPENSUSE-TW-PPC: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-OPENSUSE-TW-PPC: "{{.*}}/usr/lib{{/|\\\\}}crt1.o"
 // CHECK-OPENSUSE-TW-PPC: "{{.*}}/usr/lib{{/|\\\\}}crti.o"
 // CHECK-OPENSUSE-TW-PPC: "{{.*}}/usr/lib/gcc/powerpc64-suse-linux/9{{/|\\\\}}crtbegin.o"
 // CHECK-OPENSUSE-TW-PPC: "-L[[SYSROOT]]/usr/lib/gcc/powerpc64-suse-linux/9"

 // RUN:     --target=arm-linux-androideabi -pthread \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/basic_android_tree/sysroot \
 // RUN:   | FileCheck --check-prefix=CHECK-ANDROID-PTHREAD-LINK %s
 // CHECK-ANDROID-PTHREAD-LINK-NOT: argument unused during compilation: '-pthread'
 //
 // Check linker invocation on a Debian LoongArch sysroot.
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=loongarch64-linux-gnu -rtlib=platform \
+// RUN:     --target=loongarch64-linux-gnu -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/debian_loong64_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-DEBIAN-ML-LOONG64 %s
 //
 // Check that "-gnuf64" is seen as "-gnu" for loong64.
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=loongarch64-linux-gnuf64 -rtlib=platform \
+// RUN:     --target=loongarch64-linux-gnuf64 -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/debian_loong64_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-DEBIAN-ML-LOONG64 %s
 // CHECK-DEBIAN-ML-LOONG64: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-DEBIAN-ML-LOONG64: "[[SYSROOT]]/usr/lib/loongarch64-linux-gnu/crt1.o"
 // CHECK-DEBIAN-ML-LOONG64: "[[SYSROOT]]/usr/lib/loongarch64-linux-gnu/crti.o"
 // CHECK-DEBIAN-ML-LOONG64: "[[SYSROOT]]/usr/lib/gcc/loongarch64-linux-gnu/13/crtbegin.o"
 // CHECK-DEBIAN-ML-LOONG64: "-L[[SYSROOT]]/usr/lib/gcc/loongarch64-linux-gnu/13"
 // CHECK-DEBIAN-ML-LOONG64: "-L[[SYSROOT]]/usr/lib/loongarch64-linux-gnu"
 // CHECK-DEBIAN-ML-LOONG64: "-L[[SYSROOT]]/usr/lib"
 // CHECK-DEBIAN-ML-LOONG64: "[[SYSROOT]]/usr/lib/gcc/loongarch64-linux-gnu/13/crtend.o"
 // CHECK-DEBIAN-ML-LOONG64: "[[SYSROOT]]/usr/lib/loongarch64-linux-gnu/crtn.o"
 //
 // Check linker invocation on Debian 6 MIPS 32/64-bit.
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=mipsel-linux-gnu -rtlib=platform \
+// RUN:     --target=mipsel-linux-gnu -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/debian_6_mips_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-DEBIAN-ML-MIPSEL %s
 // CHECK-DEBIAN-ML-MIPSEL: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-DEBIAN-ML-MIPSEL: "{{.*}}/usr/lib/gcc/mipsel-linux-gnu/4.4/../../../../lib{{/|\\\\}}crt1.o"
 // CHECK-DEBIAN-ML-MIPSEL: "{{.*}}/usr/lib/gcc/mipsel-linux-gnu/4.4/../../../../lib{{/|\\\\}}crti.o"
 // CHECK-DEBIAN-ML-MIPSEL: "{{.*}}/usr/lib/gcc/mipsel-linux-gnu/4.4{{/|\\\\}}crtbegin.o"
 // CHECK-DEBIAN-ML-MIPSEL: "-L[[SYSROOT]]/usr/lib/gcc/mipsel-linux-gnu/4.4"
 // CHECK-DEBIAN-ML-MIPSEL: "-L[[SYSROOT]]/usr/lib/gcc/mipsel-linux-gnu/4.4/../../../../lib"
 // CHECK-DEBIAN-ML-MIPSEL: "-L[[SYSROOT]]/lib/../lib"
 // CHECK-DEBIAN-ML-MIPSEL: "-L[[SYSROOT]]/usr/lib/../lib"
 // CHECK-DEBIAN-ML-MIPSEL: "-L[[SYSROOT]]/lib"
 // CHECK-DEBIAN-ML-MIPSEL: "-L[[SYSROOT]]/usr/lib"
 //
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=mips64el-linux-gnu -rtlib=platform \
+// RUN:     --target=mips64el-linux-gnu -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/debian_6_mips_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-DEBIAN-ML-MIPS64EL %s
 // CHECK-DEBIAN-ML-MIPS64EL: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-DEBIAN-ML-MIPS64EL: "{{.*}}/usr/lib/gcc/mipsel-linux-gnu/4.4/../../../../lib64{{/|\\\\}}crt1.o"
 // CHECK-DEBIAN-ML-MIPS64EL: "{{.*}}/usr/lib/gcc/mipsel-linux-gnu/4.4/../../../../lib64{{/|\\\\}}crti.o"
 // CHECK-DEBIAN-ML-MIPS64EL: "{{.*}}/usr/lib/gcc/mipsel-linux-gnu/4.4/64{{/|\\\\}}crtbegin.o"
 // CHECK-DEBIAN-ML-MIPS64EL: "-L[[SYSROOT]]/usr/lib/gcc/mipsel-linux-gnu/4.4/64"
 // CHECK-DEBIAN-ML-MIPS64EL: "-L[[SYSROOT]]/usr/lib/gcc/mipsel-linux-gnu/4.4/../../../../lib64"
 // CHECK-DEBIAN-ML-MIPS64EL: "-L[[SYSROOT]]/lib/../lib64"
 // CHECK-DEBIAN-ML-MIPS64EL: "-L[[SYSROOT]]/usr/lib/../lib64"
 // CHECK-DEBIAN-ML-MIPS64EL: "-L[[SYSROOT]]/lib"
 // CHECK-DEBIAN-ML-MIPS64EL: "-L[[SYSROOT]]/usr/lib"
 //
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=mips64el-linux-gnu -rtlib=platform -mabi=n32 \
+// RUN:     --target=mips64el-linux-gnu -rtlib=platform --unwindlib=platform -mabi=n32 \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/debian_6_mips_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-DEBIAN-ML-MIPS64EL-N32 %s
 // CHECK-DEBIAN-ML-MIPS64EL-N32: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-DEBIAN-ML-MIPS64EL-N32: "{{.*}}/usr/lib/gcc/mipsel-linux-gnu/4.4/../../../../lib32{{/|\\\\}}crt1.o"
 // CHECK-DEBIAN-ML-MIPS64EL-N32: "{{.*}}/usr/lib/gcc/mipsel-linux-gnu/4.4/../../../../lib32{{/|\\\\}}crti.o"
 // CHECK-DEBIAN-ML-MIPS64EL-N32: "{{.*}}/usr/lib/gcc/mipsel-linux-gnu/4.4/n32{{/|\\\\}}crtbegin.o"
 // CHECK-DEBIAN-ML-MIPS64EL-N32: "-L[[SYSROOT]]/usr/lib/gcc/mipsel-linux-gnu/4.4/n32"
 // CHECK-DEBIAN-ML-MIPS64EL-N32: "-L[[SYSROOT]]/usr/lib/gcc/mipsel-linux-gnu/4.4/../../../../lib32"
 // CHECK-DEBIAN-ML-MIPS64EL-N32: "-L[[SYSROOT]]/lib/../lib32"
 // CHECK-DEBIAN-ML-MIPS64EL-N32: "-L[[SYSROOT]]/usr/lib/../lib32"
 // CHECK-DEBIAN-ML-MIPS64EL-N32: "-L[[SYSROOT]]/lib"
 // CHECK-DEBIAN-ML-MIPS64EL-N32: "-L[[SYSROOT]]/usr/lib"
 //
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=mips64el-linux-gnuabi64 -rtlib=platform -mabi=32 \
+// RUN:     --target=mips64el-linux-gnuabi64 -rtlib=platform --unwindlib=platform -mabi=32 \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/debian_6_mips64_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-DEBIAN-ML-MIPS64EL-O32 %s
 // CHECK-DEBIAN-ML-MIPS64EL-O32: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-DEBIAN-ML-MIPS64EL-O32: "{{.*}}/usr/lib/gcc/mips64el-linux-gnuabi64/4.9/../../../../libo32{{/|\\\\}}crt1.o"
 // CHECK-DEBIAN-ML-MIPS64EL-O32: "{{.*}}/usr/lib/gcc/mips64el-linux-gnuabi64/4.9/../../../../libo32{{/|\\\\}}crti.o"
 // CHECK-DEBIAN-ML-MIPS64EL-O32: "{{.*}}/usr/lib/gcc/mips64el-linux-gnuabi64/4.9/32{{/|\\\\}}crtbegin.o"
 // CHECK-DEBIAN-ML-MIPS64EL-O32: "-L[[SYSROOT]]/usr/lib/gcc/mips64el-linux-gnuabi64/4.9/32"
 // CHECK-DEBIAN-ML-MIPS64EL-O32: "-L[[SYSROOT]]/usr/lib/gcc/mips64el-linux-gnuabi64/4.9/../../../../libo32"
 // CHECK-DEBIAN-ML-MIPS64EL-O32: "-L[[SYSROOT]]/libo32"
 // CHECK-DEBIAN-ML-MIPS64EL-O32: "-L[[SYSROOT]]/usr/libo32"
 // CHECK-DEBIAN-ML-MIPS64EL-O32: "-L[[SYSROOT]]/lib"
 // CHECK-DEBIAN-ML-MIPS64EL-O32: "-L[[SYSROOT]]/usr/lib"
 //
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=mips64-unknown-linux-gnu --rtlib=platform \
+// RUN:     --target=mips64-unknown-linux-gnu --rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/debian_6_mips64_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-DEBIAN-ML-MIPS64-GNUABI %s
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=mips64-linux-gnuabi64 -rtlib=platform -mabi=n64 \
+// RUN:     --target=mips64-linux-gnuabi64 -rtlib=platform --unwindlib=platform -mabi=n64 \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/debian_6_mips64_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-DEBIAN-ML-MIPS64-GNUABI %s
 // CHECK-DEBIAN-ML-MIPS64-GNUABI: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-DEBIAN-ML-MIPS64-GNUABI: "{{.*}}/usr/lib/mips64-linux-gnuabi64{{/|\\\\}}crt1.o"
 // CHECK-DEBIAN-ML-MIPS64-GNUABI: "{{.*}}/usr/lib/mips64-linux-gnuabi64{{/|\\\\}}crti.o"
 // CHECK-DEBIAN-ML-MIPS64-GNUABI: "{{.*}}/usr/lib/gcc/mips64-linux-gnuabi64/4.9{{/|\\\\}}crtbegin.o"
 // CHECK-DEBIAN-ML-MIPS64-GNUABI: "-L[[SYSROOT]]/usr/lib/gcc/mips64-linux-gnuabi64/4.9"
 // CHECK-DEBIAN-ML-MIPS64-GNUABI: "-L[[SYSROOT]]/lib/mips64-linux-gnuabi64"
 // CHECK-DEBIAN-ML-MIPS64-GNUABI: "-L[[SYSROOT]]/usr/lib/mips64-linux-gnuabi64"
 // CHECK-DEBIAN-ML-MIPS64-GNUABI: "-L[[SYSROOT]]/lib"
 // CHECK-DEBIAN-ML-MIPS64-GNUABI: "-L[[SYSROOT]]/usr/lib"
 // CHECK-DEBIAN-ML-MIPS64-GNUABI: "{{.*}}/usr/lib/gcc/mips64-linux-gnuabi64/4.9{{/|\\\\}}crtend.o"
 // CHECK-DEBIAN-ML-MIPS64-GNUABI: "{{.*}}/usr/lib/mips64-linux-gnuabi64{{/|\\\\}}crtn.o"
 //
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=mips64el-unknown-linux-gnu -rtlib=platform \
+// RUN:     --target=mips64el-unknown-linux-gnu -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/debian_6_mips64_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-DEBIAN-ML-MIPS64EL-GNUABI %s
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=mips64el-linux-gnuabi64 -rtlib=platform -mabi=n64 \
+// RUN:     --target=mips64el-linux-gnuabi64 -rtlib=platform --unwindlib=platform -mabi=n64 \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/debian_6_mips64_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-DEBIAN-ML-MIPS64EL-GNUABI %s
 // CHECK-DEBIAN-ML-MIPS64EL-GNUABI: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-DEBIAN-ML-MIPS64EL-GNUABI: "{{.*}}/usr/lib/mips64el-linux-gnuabi64{{/|\\\\}}crt1.o"
 // CHECK-DEBIAN-ML-MIPS64EL-GNUABI: "{{.*}}/usr/lib/mips64el-linux-gnuabi64{{/|\\\\}}crti.o"
 // CHECK-DEBIAN-ML-MIPS64EL-GNUABI: "{{.*}}/usr/lib/gcc/mips64el-linux-gnuabi64/4.9{{/|\\\\}}crtbegin.o"
 // CHECK-DEBIAN-ML-MIPS64EL-GNUABI: "-L[[SYSROOT]]/usr/lib/gcc/mips64el-linux-gnuabi64/4.9"
 // CHECK-DEBIAN-ML-MIPS64EL-GNUABI: "-L[[SYSROOT]]/lib/mips64el-linux-gnuabi64"
 // CHECK-DEBIAN-ML-MIPS64EL-GNUABI: "-L[[SYSROOT]]/usr/lib/mips64el-linux-gnuabi64"
 // CHECK-DEBIAN-ML-MIPS64EL-GNUABI: "-L[[SYSROOT]]/lib"
 // CHECK-DEBIAN-ML-MIPS64EL-GNUABI: "-L[[SYSROOT]]/usr/lib"
 // CHECK-DEBIAN-ML-MIPS64EL-GNUABI: "{{.*}}/usr/lib/gcc/mips64el-linux-gnuabi64/4.9{{/|\\\\}}crtend.o"
 // CHECK-DEBIAN-ML-MIPS64EL-GNUABI: "{{.*}}/usr/lib/mips64el-linux-gnuabi64{{/|\\\\}}crtn.o"
 //
 // Test linker invocation for Freescale SDK (OpenEmbedded).
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=powerpc-fsl-linux -rtlib=platform \
+// RUN:     --target=powerpc-fsl-linux -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/freescale_ppc_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-FSL-PPC %s
 // CHECK-FSL-PPC: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-FSL-PPC: "-m" "elf32ppclinux"
 // CHECK-FSL-PPC: "{{.*}}{{/|\\\\}}crt1.o"
 // CHECK-FSL-PPC: "{{.*}}{{/|\\\\}}crtbegin.o"
 // CHECK-FSL-PPC: "-L[[SYSROOT]]/usr/lib"
 // RUN: %clang -### %s -no-pie 2>&1 \
-// RUN:     --target=powerpc64-fsl-linux -rtlib=platform \
+// RUN:     --target=powerpc64-fsl-linux -rtlib=platform --unwindlib=platform \
 // RUN:     --gcc-toolchain="" \
 // RUN:     --sysroot=%S/Inputs/freescale_ppc64_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-FSL-PPC64 %s
 // CHECK-FSL-PPC64: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-FSL-PPC64: "-m" "elf64ppc"
 // CHECK-FSL-PPC64: "{{.*}}{{/|\\\\}}crt1.o"
 // CHECK-FSL-PPC64: "{{.*}}{{/|\\\\}}crtbegin.o"
 //

clang/test/Driver/loongarch-toolchain.c

 // UNSUPPORTED: system-windows
 /// A basic clang -cc1 command-line, and simple environment check.
 
 // RUN: %clang %s -### --target=loongarch32 2>&1 | FileCheck --check-prefix=CC1 %s -DTRIPLE=loongarch32
 // RUN: %clang %s -### --target=loongarch64 2>&1 | FileCheck --check-prefix=CC1 %s -DTRIPLE=loongarch64
 
 // CC1: "-cc1" "-triple" "[[TRIPLE]]"
 
 /// In the below tests, --rtlib=platform is used so that the driver ignores
 /// the configure-time CLANG_DEFAULT_RTLIB option when choosing the runtime lib.
 
 // RUN: env "PATH=" %clang -### %s -fuse-ld=ld -no-pie -mabi=lp64d \
-// RUN:   --target=loongarch64-unknown-linux-gnu --rtlib=platform \
+// RUN:   --target=loongarch64-unknown-linux-gnu --rtlib=platform --unwindlib=platform \
 // RUN:   --gcc-toolchain=%S/Inputs/multilib_loongarch_linux_sdk \
 // RUN:   --sysroot=%S/Inputs/multilib_loongarch_linux_sdk/sysroot 2>&1 \
 // RUN:   | FileCheck --check-prefix=LA64 %s
 
 // LA64: "{{.*}}/Inputs/multilib_loongarch_linux_sdk/lib/gcc/loongarch64-unknown-linux-gnu/12.1.0/../../../../loongarch64-unknown-linux-gnu/bin/ld"
 // LA64-SAME: {{^}} "--sysroot={{.*}}/Inputs/multilib_loongarch_linux_sdk/sysroot"
 // LA64-SAME: "-m" "elf64loongarch"
 // LA64-SAME: "-dynamic-linker" "/lib64/ld-linux-loongarch-lp64d.so.1"
 // LA64-SAME: "{{.*}}/Inputs/multilib_loongarch_linux_sdk/lib/gcc/loongarch64-unknown-linux-gnu/12.1.0/crtbegin.o"
 // LA64-SAME: "-L{{.*}}/Inputs/multilib_loongarch_linux_sdk/lib/gcc/loongarch64-unknown-linux-gnu/12.1.0"
 // LA64-SAME: {{^}} "-L{{.*}}/Inputs/multilib_loongarch_linux_sdk/lib/gcc/loongarch64-unknown-linux-gnu/12.1.0/../../../../loongarch64-unknown-linux-gnu/lib/../lib64"
 // LA64-SAME: {{^}} "-L{{.*}}/Inputs/multilib_loongarch_linux_sdk/sysroot/usr/lib/../lib64"
 // LA64-SAME: {{^}} "-L{{.*}}/Inputs/multilib_loongarch_linux_sdk/lib/gcc/loongarch64-unknown-linux-gnu/12.1.0/../../../../loongarch64-unknown-linux-gnu/lib"
 // LA64-SAME: {{^}} "-L{{.*}}/Inputs/multilib_loongarch_linux_sdk/sysroot/usr/lib"

clang/test/Driver/miamcu-opt.c

-// RUN: %clang -### --target=x86_64 -miamcu -rtlib=platform %s 2>&1 | FileCheck %s
-// RUN: %clang -### --target=x86_64 -miamcu -rtlib=platform -m32 %s 2>&1 | FileCheck %s
-// RUN: %clang -### --target=x86_64 -miamcu -rtlib=platform --target=x86_64-unknown-linux-gnu %s 2>&1 | FileCheck %s
-// RUN: %clang -### --target=x86_64 -mno-iamcu -miamcu -rtlib=platform %s 2>&1 | FileCheck %s
-// RUN: not %clang -### --target=x86_64 -miamcu -rtlib=platform -m64 %s 2>&1 | FileCheck %s -check-prefix=M64
-// RUN: not %clang -### --target=x86_64 -miamcu -rtlib=platform -dynamic %s 2>&1 | FileCheck %s -check-prefix=DYNAMIC
-// RUN: not %clang -### --target=x86_64 -miamcu -rtlib=platform  --target=armv8-eabi %s 2>&1 | FileCheck %s -check-prefix=NOT-X86
+// RUN: %clang -### --target=x86_64 -miamcu -rtlib=platform --unwindlib=platform %s 2>&1 | FileCheck %s
+// RUN: %clang -### --target=x86_64 -miamcu -rtlib=platform --unwindlib=platform -m32 %s 2>&1 | FileCheck %s
+// RUN: %clang -### --target=x86_64 -miamcu -rtlib=platform --unwindlib=platform --target=x86_64-unknown-linux-gnu %s 2>&1 | FileCheck %s
+// RUN: %clang -### --target=x86_64 -mno-iamcu -miamcu -rtlib=platform --unwindlib=platform %s 2>&1 | FileCheck %s
+// RUN: not %clang -### --target=x86_64 -miamcu -rtlib=platform --unwindlib=platform -m64 %s 2>&1 | FileCheck %s -check-prefix=M64
+// RUN: not %clang -### --target=x86_64 -miamcu -rtlib=platform --unwindlib=platform -dynamic %s 2>&1 | FileCheck %s -check-prefix=DYNAMIC
+// RUN: not %clang -### --target=x86_64 -miamcu -rtlib=platform --unwindlib=platform  --target=armv8-eabi %s 2>&1 | FileCheck %s -check-prefix=NOT-X86
 // RUN: %clang -### --target=x86_64-unknown-linux-gnu -miamcu -mno-iamcu %s 2>&1 | FileCheck %s -check-prefix=MNOIAMCU
 
 // M64: error: invalid argument '-miamcu' not allowed with '-m64'
 
 // DYNAMIC: error: invalid argument '-dynamic' not allowed with '-static'
 
 // NOT-X86: error: unsupported option '-miamcu' for target 'armv8-unknown-unknown-eabi'
 

clang/test/Driver/nolibc.c

-// RUN: %clang -target i686-pc-linux-gnu -### -rtlib=libgcc -nolibc %s 2>&1 | FileCheck %s
+// RUN: %clang -target i686-pc-linux-gnu -### -rtlib=libgcc --unwindlib=libgcc -nolibc %s 2>&1 | FileCheck %s
 // CHECK: crtbegin
 // CHECK: "-lgcc"
 // CHECK-NOT: "-lc"
 // CHECK: crtend

clang/test/Driver/pic.c

 //
 // Make sure -pie is passed to along to ld and that the right *crt* files
 // are linked in.
 // RUN: %clang %s -target i386-unknown-freebsd -fPIE -pie -### \
 // RUN: --gcc-toolchain="" -rtlib=platform \
 // RUN: --sysroot=%S/Inputs/basic_freebsd_tree 2>&1 \
 // RUN:   | FileCheck %s --check-prefix=CHECK-PIE-LD
 // RUN: %clang %s -target i386-linux-gnu -fPIE -pie -### \
-// RUN: --gcc-toolchain="" -rtlib=platform \
+// RUN: --gcc-toolchain="" -rtlib=platform --unwindlib=platform \
 // RUN: --sysroot=%S/Inputs/basic_linux_tree 2>&1 \
 // RUN:   | FileCheck %s --check-prefix=CHECK-PIE-LD
 // RUN: %clang %s -target i386-linux-gnu -fPIC -pie -### \
-// RUN: --gcc-toolchain="" -rtlib=platform \
+// RUN: --gcc-toolchain="" -rtlib=platform --unwindlib=platform \
 // RUN: --sysroot=%S/Inputs/basic_linux_tree 2>&1 \
 // RUN:   | FileCheck %s --check-prefix=CHECK-PIE-LD
 //
 // Disregard any of the PIC-specific flags if we have a trump-card flag.
 // RUN: %clang -c %s -target i386-unknown-unknown -mkernel -fPIC -### 2>&1 \
 // RUN:   | FileCheck %s --check-prefix=CHECK-NO-PIC
 
 // The -static argument *doesn't* override PIC: -static only affects

clang/test/Driver/riscv32-toolchain.c

 // CXX-RV32-BAREMETAL-NOSYSROOT-ILP32: "{{.*}}/Inputs/basic_riscv32_tree/lib/gcc/riscv32-unknown-linux-gnu/8.0.1/../../..{{/|\\\\}}..{{/|\\\\}}riscv32-unknown-linux-gnu/lib{{/|\\\\}}crt0.o"
 // CXX-RV32-BAREMETAL-NOSYSROOT-ILP32: "{{.*}}/Inputs/basic_riscv32_tree/lib/gcc/riscv32-unknown-linux-gnu/8.0.1{{/|\\\\}}crtbegin.o"
 // CXX-RV32-BAREMETAL-NOSYSROOT-ILP32: "-L{{.*}}/Inputs/basic_riscv32_tree/lib/gcc/riscv32-unknown-linux-gnu/8.0.1"
 // CXX-RV32-BAREMETAL-NOSYSROOT-ILP32: "-L{{.*}}/Inputs/basic_riscv32_tree/lib/gcc/riscv32-unknown-linux-gnu/8.0.1/../../..{{/|\\\\}}..{{/|\\\\}}riscv32-unknown-linux-gnu/lib"
 // CXX-RV32-BAREMETAL-NOSYSROOT-ILP32: "-lstdc++" "-lm" "--start-group" "-lc" "-lgloss" "--end-group" "-lgcc"
 // CXX-RV32-BAREMETAL-NOSYSROOT-ILP32: "{{.*}}/Inputs/basic_riscv32_tree/lib/gcc/riscv32-unknown-linux-gnu/8.0.1{{/|\\\\}}crtend.o"
 
 // RUN: env "PATH=" %clang -### %s -fuse-ld=ld -no-pie \
-// RUN:   --target=riscv32-unknown-linux-gnu --rtlib=platform -mabi=ilp32 \
+// RUN:   --target=riscv32-unknown-linux-gnu --rtlib=platform --unwindlib=platform -mabi=ilp32 \
 // RUN:   --gcc-toolchain=%S/Inputs/multilib_riscv_linux_sdk \
 // RUN:   --sysroot=%S/Inputs/multilib_riscv_linux_sdk/sysroot 2>&1 \
 // RUN:   | FileCheck -check-prefix=C-RV32-LINUX-MULTI-ILP32 %s
 
 // C-RV32-LINUX-MULTI-ILP32: "{{.*}}/Inputs/multilib_riscv_linux_sdk/lib/gcc/riscv64-unknown-linux-gnu/7.2.0/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-linux-gnu/bin{{/|\\\\}}ld"
 // C-RV32-LINUX-MULTI-ILP32: "--sysroot={{.*}}/Inputs/multilib_riscv_linux_sdk/sysroot"
 // C-RV32-LINUX-MULTI-ILP32: "-m" "elf32lriscv" "-X"
 // C-RV32-LINUX-MULTI-ILP32: "-dynamic-linker" "/lib/ld-linux-riscv32-ilp32.so.1"
 // C-RV32-LINUX-MULTI-ILP32: "{{.*}}/Inputs/multilib_riscv_linux_sdk/lib/gcc/riscv64-unknown-linux-gnu/7.2.0/lib32/ilp32{{/|\\\\}}crtbegin.o"
 // C-RV32-LINUX-MULTI-ILP32: "-L{{.*}}/Inputs/multilib_riscv_linux_sdk/lib/gcc/riscv64-unknown-linux-gnu/7.2.0/lib32/ilp32"
 // C-RV32-LINUX-MULTI-ILP32: "-L{{.*}}/Inputs/multilib_riscv_linux_sdk/sysroot/lib32/ilp32"
 // C-RV32-LINUX-MULTI-ILP32: "-L{{.*}}/Inputs/multilib_riscv_linux_sdk/sysroot/usr/lib32/ilp32"
 
 // RUN: env "PATH=" %clang -### %s -fuse-ld=ld -no-pie \
-// RUN:   --target=riscv32-unknown-linux-gnu --rtlib=platform -march=rv32imafd \
+// RUN:   --target=riscv32-unknown-linux-gnu --rtlib=platform --unwindlib=platform -march=rv32imafd \
 // RUN:   --gcc-toolchain=%S/Inputs/multilib_riscv_linux_sdk \
 // RUN:   --sysroot=%S/Inputs/multilib_riscv_linux_sdk/sysroot 2>&1 \
 // RUN:   | FileCheck -check-prefix=C-RV32-LINUX-MULTI-ILP32D %s
 
 // C-RV32-LINUX-MULTI-ILP32D: "{{.*}}/Inputs/multilib_riscv_linux_sdk/lib/gcc/riscv64-unknown-linux-gnu/7.2.0/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-linux-gnu/bin{{/|\\\\}}ld"
 // C-RV32-LINUX-MULTI-ILP32D: "--sysroot={{.*}}/Inputs/multilib_riscv_linux_sdk/sysroot"
 // C-RV32-LINUX-MULTI-ILP32D: "-m" "elf32lriscv"
 // C-RV32-LINUX-MULTI-ILP32D: "-dynamic-linker" "/lib/ld-linux-riscv32-ilp32d.so.1"
 // C-RV32-LINUX-MULTI-ILP32D: "{{.*}}/Inputs/multilib_riscv_linux_sdk/lib/gcc/riscv64-unknown-linux-gnu/7.2.0/lib32/ilp32d{{/|\\\\}}crtbegin.o"
 // C-RV32-LINUX-MULTI-ILP32D: "-L{{.*}}/Inputs/multilib_riscv_linux_sdk/lib/gcc/riscv64-unknown-linux-gnu/7.2.0/lib32/ilp32d"
 // C-RV32-LINUX-MULTI-ILP32D: "-L{{.*}}/Inputs/multilib_riscv_linux_sdk/sysroot/lib32/ilp32d"
 // C-RV32-LINUX-MULTI-ILP32D: "-L{{.*}}/Inputs/multilib_riscv_linux_sdk/sysroot/usr/lib32/ilp32d"
 
 // RUN: env "PATH=" %clang -### %s -fuse-ld=ld \
-// RUN:   --target=riscv32-unknown-elf --rtlib=platform --sysroot= \
+// RUN:   --target=riscv32-unknown-elf --rtlib=platform --unwindlib=platform --sysroot= \
 // RUN:   --gcc-toolchain=%S/Inputs/multilib_riscv_elf_sdk 2>&1 \
 // RUN:   | FileCheck -check-prefix=C-RV32I-BAREMETAL-MULTI-ILP32 %s
 
 // C-RV32I-BAREMETAL-MULTI-ILP32: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-elf/bin{{/|\\\\}}ld"
 // C-RV32I-BAREMETAL-MULTI-ILP32: "-m" "elf32lriscv"
 // C-RV32I-BAREMETAL-MULTI-ILP32: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-elf/lib/rv32imac/ilp32{{/|\\\\}}crt0.o"
 // C-RV32I-BAREMETAL-MULTI-ILP32: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/rv32imac/ilp32{{/|\\\\}}crtbegin.o"
 // C-RV32I-BAREMETAL-MULTI-ILP32: "-L{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0"
 // C-RV32I-BAREMETAL-MULTI-ILP32: "-L{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-elf/lib"
 // C-RV32I-BAREMETAL-MULTI-ILP32: "--start-group" "-lc" "-lgloss" "--end-group" "-lgcc"
 // C-RV32I-BAREMETAL-MULTI-ILP32: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/rv32imac/ilp32{{/|\\\\}}crtend.o"
 
 // RUN: env "PATH=" %clang -### %s -fuse-ld=ld \
-// RUN:   --target=riscv32-unknown-elf --rtlib=platform --sysroot= \
+// RUN:   --target=riscv32-unknown-elf --rtlib=platform --unwindlib=platform --sysroot= \
 // RUN:   -march=rv32im -mabi=ilp32\
 // RUN:   --gcc-toolchain=%S/Inputs/multilib_riscv_elf_sdk 2>&1 \
 // RUN:   | FileCheck -check-prefix=C-RV32IM-BAREMETAL-MULTI-ILP32 %s
 
 // C-RV32IM-BAREMETAL-MULTI-ILP32: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-elf/bin{{/|\\\\}}ld"
 // C-RV32IM-BAREMETAL-MULTI-ILP32: "-m" "elf32lriscv"
 // C-RV32IM-BAREMETAL-MULTI-ILP32: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-elf/lib/rv32im/ilp32{{/|\\\\}}crt0.o"
 // C-RV32IM-BAREMETAL-MULTI-ILP32: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/rv32im/ilp32{{/|\\\\}}crtbegin.o"
 // C-RV32IM-BAREMETAL-MULTI-ILP32: "-L{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0"
 // C-RV32IM-BAREMETAL-MULTI-ILP32: "-L{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-elf/lib"
 // C-RV32IM-BAREMETAL-MULTI-ILP32: "--start-group" "-lc" "-lgloss" "--end-group" "-lgcc"
 // C-RV32IM-BAREMETAL-MULTI-ILP32: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/rv32im/ilp32{{/|\\\\}}crtend.o"
 
 // RUN: env "PATH=" %clang -### %s -fuse-ld=ld \
-// RUN:   --target=riscv32-unknown-elf --rtlib=platform --sysroot= \
+// RUN:   --target=riscv32-unknown-elf --rtlib=platform --unwindlib=platform --sysroot= \
 // RUN:   -march=rv32iac -mabi=ilp32\
 // RUN:   --gcc-toolchain=%S/Inputs/multilib_riscv_elf_sdk 2>&1 \
 // RUN:   | FileCheck -check-prefix=C-RV32IAC-BAREMETAL-MULTI-ILP32 %s
 
 // C-RV32IAC-BAREMETAL-MULTI-ILP32: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-elf/bin{{/|\\\\}}ld"
 // C-RV32IAC-BAREMETAL-MULTI-ILP32: "-m" "elf32lriscv"
 // C-RV32IAC-BAREMETAL-MULTI-ILP32: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-elf/lib/rv32iac/ilp32{{/|\\\\}}crt0.o"
 // C-RV32IAC-BAREMETAL-MULTI-ILP32: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/rv32iac/ilp32{{/|\\\\}}crtbegin.o"
 // C-RV32IAC-BAREMETAL-MULTI-ILP32: "-L{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0"
 // C-RV32IAC-BAREMETAL-MULTI-ILP32: "-L{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-elf/lib"
 // C-RV32IAC-BAREMETAL-MULTI-ILP32: "--start-group" "-lc" "-lgloss" "--end-group" "-lgcc"
 // C-RV32IAC-BAREMETAL-MULTI-ILP32: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/rv32iac/ilp32{{/|\\\\}}crtend.o"
 
 // RUN: env "PATH=" %clang -### %s -fuse-ld=ld \
-// RUN:   --target=riscv32-unknown-elf --rtlib=platform --sysroot= \
+// RUN:   --target=riscv32-unknown-elf --rtlib=platform --unwindlib=platform --sysroot= \
 // RUN:   -march=rv32imac -mabi=ilp32\
 // RUN:   --gcc-toolchain=%S/Inputs/multilib_riscv_elf_sdk 2>&1 \
 // RUN:   | FileCheck -check-prefix=C-RV32IMAC-BAREMETAL-MULTI-ILP32 %s
 
 // C-RV32IMAC-BAREMETAL-MULTI-ILP32: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-elf/bin{{/|\\\\}}ld"
 // C-RV32IMAC-BAREMETAL-MULTI-ILP32: "-m" "elf32lriscv"
 // C-RV32IMAC-BAREMETAL-MULTI-ILP32: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-elf/lib/rv32imac/ilp32{{/|\\\\}}crt0.o"
 // C-RV32IMAC-BAREMETAL-MULTI-ILP32: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/rv32imac/ilp32{{/|\\\\}}crtbegin.o"
 // C-RV32IMAC-BAREMETAL-MULTI-ILP32: "-L{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0"
 // C-RV32IMAC-BAREMETAL-MULTI-ILP32: "-L{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-elf/lib"
 // C-RV32IMAC-BAREMETAL-MULTI-ILP32: "--start-group" "-lc" "-lgloss" "--end-group" "-lgcc"
 // C-RV32IMAC-BAREMETAL-MULTI-ILP32: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/rv32imac/ilp32{{/|\\\\}}crtend.o"
 
 // RUN: env "PATH=" %clang -### %s -fuse-ld=ld \
-// RUN:   --target=riscv32-unknown-elf --rtlib=platform --sysroot= \
+// RUN:   --target=riscv32-unknown-elf --rtlib=platform --unwindlib=platform --sysroot= \
 // RUN:   -march=rv32imafc -mabi=ilp32f \
 // RUN:   --gcc-toolchain=%S/Inputs/multilib_riscv_elf_sdk 2>&1 \
 // RUN:   | FileCheck -check-prefix=C-RV32IMAFC-BAREMETAL-MULTI-ILP32F %s
 
 // C-RV32IMAFC-BAREMETAL-MULTI-ILP32F: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-elf/bin{{/|\\\\}}ld"
 // C-RV32IMAFC-BAREMETAL-MULTI-ILP32F: "-m" "elf32lriscv"
 // C-RV32IMAFC-BAREMETAL-MULTI-ILP32F: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-elf/lib/rv32imafc/ilp32f{{/|\\\\}}crt0.o"
 // C-RV32IMAFC-BAREMETAL-MULTI-ILP32F: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/rv32imafc/ilp32f{{/|\\\\}}crtbegin.o"
 // C-RV32IMAFC-BAREMETAL-MULTI-ILP32F: "-L{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0"
 // C-RV32IMAFC-BAREMETAL-MULTI-ILP32F: "-L{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-elf/lib"
 // C-RV32IMAFC-BAREMETAL-MULTI-ILP32F: "--start-group" "-lc" "-lgloss" "--end-group" "-lgcc"
 // C-RV32IMAFC-BAREMETAL-MULTI-ILP32F: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/rv32imafc/ilp32f{{/|\\\\}}crtend.o"
 
 // Check that --rtlib can be used to override the used runtime library
 // RUN: %clang -### %s \
 // RUN:   --gcc-toolchain=%S/Inputs/multilib_riscv_elf_sdk \
-// RUN:   --target=riscv32-unknown-elf --rtlib=libgcc 2>&1 \
+// RUN:   --target=riscv32-unknown-elf --rtlib=libgcc --unwindlib=libgcc 2>&1 \
 // RUN:   | FileCheck -check-prefix=C-RV32-RTLIB-LIBGCC-ILP32 %s
 // C-RV32-RTLIB-LIBGCC-ILP32: "{{.*}}crt0.o"
 // C-RV32-RTLIB-LIBGCC-ILP32: "{{.*}}crtbegin.o"
 // C-RV32-RTLIB-LIBGCC-ILP32: "--start-group" "-lc" "-lgloss" "--end-group" "-lgcc"
 // C-RV32-RTLIB-LIBGCC-ILP32: "{{.*}}crtend.o"
 
 // RUN: %clang -### %s \
 // RUN:   --gcc-toolchain=%S/Inputs/multilib_riscv_elf_sdk \
-// RUN:   --target=riscv32-unknown-elf --rtlib=compiler-rt 2>&1 \
+// RUN:   --target=riscv32-unknown-elf --rtlib=compiler-rt --unwindlib=compiler-rt 2>&1 \
 // RUN:   | FileCheck -check-prefix=C-RV32-RTLIB-COMPILERRT-ILP32 %s
 // C-RV32-RTLIB-COMPILERRT-ILP32: "{{.*}}crt0.o"
 // C-RV32-RTLIB-COMPILERRT-ILP32: "{{.*}}clang_rt.crtbegin-riscv32.o"
 // C-RV32-RTLIB-COMPILERRT-ILP32: "--start-group" "-lc" "-lgloss" "--end-group" "{{.*}}libclang_rt.builtins-riscv32.a"
 // C-RV32-RTLIB-COMPILERRT-ILP32: "{{.*}}clang_rt.crtend-riscv32.o"
 
 // RUN: %clang -### %s --target=riscv32 \
 // RUN:   --gcc-toolchain=%S/Inputs/basic_riscv32_tree --sysroot= \

clang/test/Driver/riscv64-toolchain.c

 // CXX-RV64-BAREMETAL-NOSYSROOT-LP64: "{{.*}}/Inputs/basic_riscv64_tree/lib/gcc/riscv64-unknown-linux-gnu/8.0.1/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-linux-gnu/lib{{/|\\\\}}crt0.o"
 // CXX-RV64-BAREMETAL-NOSYSROOT-LP64: "{{.*}}/Inputs/basic_riscv64_tree/lib/gcc/riscv64-unknown-linux-gnu/8.0.1{{/|\\\\}}crtbegin.o"
 // CXX-RV64-BAREMETAL-NOSYSROOT-LP64: "-L{{.*}}/Inputs/basic_riscv64_tree/lib/gcc/riscv64-unknown-linux-gnu/8.0.1"
 // CXX-RV64-BAREMETAL-NOSYSROOT-LP64: "-L{{.*}}/Inputs/basic_riscv64_tree/lib/gcc/riscv64-unknown-linux-gnu/8.0.1/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-linux-gnu/lib"
 // CXX-RV64-BAREMETAL-NOSYSROOT-LP64: "-lstdc++" "-lm" "--start-group" "-lc" "-lgloss" "--end-group" "-lgcc"
 // CXX-RV64-BAREMETAL-NOSYSROOT-LP64: "{{.*}}/Inputs/basic_riscv64_tree/lib/gcc/riscv64-unknown-linux-gnu/8.0.1{{/|\\\\}}crtend.o"
 
 // RUN: env "PATH=" %clang -### %s -fuse-ld= -no-pie \
-// RUN:   --target=riscv64-unknown-linux-gnu --rtlib=platform -mabi=lp64 \
+// RUN:   --target=riscv64-unknown-linux-gnu --rtlib=platform --unwindlib=platform -mabi=lp64 \
 // RUN:   --gcc-toolchain=%S/Inputs/multilib_riscv_linux_sdk \
 // RUN:   --sysroot=%S/Inputs/multilib_riscv_linux_sdk/sysroot 2>&1 \
 // RUN:   | FileCheck -check-prefix=C-RV64-LINUX-MULTI-LP64 %s
 
 // C-RV64-LINUX-MULTI-LP64: "{{.*}}/Inputs/multilib_riscv_linux_sdk/lib/gcc/riscv64-unknown-linux-gnu/7.2.0/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-linux-gnu/bin{{/|\\\\}}ld"
 // C-RV64-LINUX-MULTI-LP64: "--sysroot={{.*}}/Inputs/multilib_riscv_linux_sdk/sysroot"
 // C-RV64-LINUX-MULTI-LP64: "-m" "elf64lriscv" "-X"
 // C-RV64-LINUX-MULTI-LP64: "-dynamic-linker" "/lib/ld-linux-riscv64-lp64.so.1"
 // C-RV64-LINUX-MULTI-LP64: "{{.*}}/Inputs/multilib_riscv_linux_sdk/lib/gcc/riscv64-unknown-linux-gnu/7.2.0/lib64/lp64{{/|\\\\}}crtbegin.o"
 // C-RV64-LINUX-MULTI-LP64: "-L{{.*}}/Inputs/multilib_riscv_linux_sdk/lib/gcc/riscv64-unknown-linux-gnu/7.2.0/lib64/lp64"
 // C-RV64-LINUX-MULTI-LP64: "-L{{.*}}/Inputs/multilib_riscv_linux_sdk/sysroot/lib64/lp64"
 // C-RV64-LINUX-MULTI-LP64: "-L{{.*}}/Inputs/multilib_riscv_linux_sdk/sysroot/usr/lib64/lp64"
 
 // RUN: env "PATH=" %clang -### %s -fuse-ld=ld -no-pie \
-// RUN:   --target=riscv64-unknown-linux-gnu --rtlib=platform -march=rv64imafd \
+// RUN:   --target=riscv64-unknown-linux-gnu --rtlib=platform --unwindlib=platform -march=rv64imafd \
 // RUN:   --gcc-toolchain=%S/Inputs/multilib_riscv_linux_sdk \
 // RUN:   --sysroot=%S/Inputs/multilib_riscv_linux_sdk/sysroot 2>&1 \
 // RUN:   | FileCheck -check-prefix=C-RV64-LINUX-MULTI-LP64D %s
 
 // C-RV64-LINUX-MULTI-LP64D: "{{.*}}/Inputs/multilib_riscv_linux_sdk/lib/gcc/riscv64-unknown-linux-gnu/7.2.0/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-linux-gnu/bin{{/|\\\\}}ld"
 // C-RV64-LINUX-MULTI-LP64D: "--sysroot={{.*}}/Inputs/multilib_riscv_linux_sdk/sysroot"
 // C-RV64-LINUX-MULTI-LP64D: "-m" "elf64lriscv"
 // C-RV64-LINUX-MULTI-LP64D: "-dynamic-linker" "/lib/ld-linux-riscv64-lp64d.so.1"
 // C-RV64-LINUX-MULTI-LP64D: "{{.*}}/Inputs/multilib_riscv_linux_sdk/lib/gcc/riscv64-unknown-linux-gnu/7.2.0/lib64/lp64d{{/|\\\\}}crtbegin.o"
 // C-RV64-LINUX-MULTI-LP64D: "-L{{.*}}/Inputs/multilib_riscv_linux_sdk/lib/gcc/riscv64-unknown-linux-gnu/7.2.0/lib64/lp64d"
 // C-RV64-LINUX-MULTI-LP64D: "-L{{.*}}/Inputs/multilib_riscv_linux_sdk/sysroot/lib64/lp64d"
 // C-RV64-LINUX-MULTI-LP64D: "-L{{.*}}/Inputs/multilib_riscv_linux_sdk/sysroot/usr/lib64/lp64d"
 
 // RUN: env "PATH=" %clang -### %s -fuse-ld=ld \
-// RUN:   --target=riscv64-unknown-elf --rtlib=platform --sysroot= \
+// RUN:   --target=riscv64-unknown-elf --rtlib=platform --unwindlib=platform --sysroot= \
 // RUN:   -march=rv64imac -mabi=lp64\
 // RUN:   --gcc-toolchain=%S/Inputs/multilib_riscv_elf_sdk 2>&1 \
 // RUN:   | FileCheck -check-prefix=C-RV64IMAC-BAREMETAL-MULTI-LP64 %s
 
 // C-RV64IMAC-BAREMETAL-MULTI-LP64: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-elf/bin{{/|\\\\}}ld"
 // C-RV64IMAC-BAREMETAL-MULTI-LP64: "-m" "elf64lriscv"
 // C-RV64IMAC-BAREMETAL-MULTI-LP64: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-elf/lib/rv64imac/lp64{{/|\\\\}}crt0.o"
 // C-RV64IMAC-BAREMETAL-MULTI-LP64: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/rv64imac/lp64{{/|\\\\}}crtbegin.o"
 // C-RV64IMAC-BAREMETAL-MULTI-LP64: "-L{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0"
 // C-RV64IMAC-BAREMETAL-MULTI-LP64: "-L{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-elf/lib"
 // C-RV64IMAC-BAREMETAL-MULTI-LP64: "--start-group" "-lc" "-lgloss" "--end-group" "-lgcc"
 // C-RV64IMAC-BAREMETAL-MULTI-LP64: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/rv64imac/lp64{{/|\\\\}}crtend.o"
 
 // RUN: env "PATH=" %clang -### %s -fuse-ld=ld \
-// RUN:   --target=riscv64-unknown-elf --rtlib=platform --sysroot= \
+// RUN:   --target=riscv64-unknown-elf --rtlib=platform --unwindlib=platform --sysroot= \
 // RUN:   -march=rv64imafdc -mabi=lp64d \
 // RUN:   --gcc-toolchain=%S/Inputs/multilib_riscv_elf_sdk 2>&1 \
 // RUN:   | FileCheck -check-prefix=C-RV64IMAFDC-BAREMETAL-MULTI-ILP64D %s
 
 // C-RV64IMAFDC-BAREMETAL-MULTI-ILP64D: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-elf/bin{{/|\\\\}}ld"
 // C-RV64IMAFDC-BAREMETAL-MULTI-ILP64D: "-m" "elf64lriscv"
 // C-RV64IMAFDC-BAREMETAL-MULTI-ILP64D: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-elf/lib/rv64imafdc/lp64d{{/|\\\\}}crt0.o"
 // C-RV64IMAFDC-BAREMETAL-MULTI-ILP64D: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/rv64imafdc/lp64d{{/|\\\\}}crtbegin.o"
 // C-RV64IMAFDC-BAREMETAL-MULTI-ILP64D: "-L{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0"
 // C-RV64IMAFDC-BAREMETAL-MULTI-ILP64D: "-L{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/../../..{{/|\\\\}}..{{/|\\\\}}riscv64-unknown-elf/lib"
 // C-RV64IMAFDC-BAREMETAL-MULTI-ILP64D: "--start-group" "-lc" "-lgloss" "--end-group" "-lgcc"
 // C-RV64IMAFDC-BAREMETAL-MULTI-ILP64D: "{{.*}}/Inputs/multilib_riscv_elf_sdk/lib/gcc/riscv64-unknown-elf/8.2.0/rv64imafdc/lp64d{{/|\\\\}}crtend.o"
 
 // Check that --rtlib can be used to override the used runtime library
 // RUN: %clang -### %s \
 // RUN:   --gcc-toolchain=%S/Inputs/multilib_riscv_elf_sdk \
-// RUN:   --target=riscv64-unknown-elf --rtlib=libgcc 2>&1 \
+// RUN:   --target=riscv64-unknown-elf --rtlib=libgcc --unwindlib=libgcc 2>&1 \
 // RUN:   | FileCheck -check-prefix=C-RV64-RTLIB-LIBGCC-LP64 %s
 // C-RV64-RTLIB-LIBGCC-LP64: "{{.*}}crt0.o"
 // C-RV64-RTLIB-LIBGCC-LP64: "{{.*}}crtbegin.o"
 // C-RV64-RTLIB-LIBGCC-LP64: "--start-group" "-lc" "-lgloss" "--end-group" "-lgcc"
 // C-RV64-RTLIB-LIBGCC-LP64: "{{.*}}crtend.o"
 
 // RUN: %clang -### %s \
 // RUN:   --gcc-toolchain=%S/Inputs/multilib_riscv_elf_sdk \
-// RUN:   --target=riscv64-unknown-elf --rtlib=compiler-rt 2>&1 \
+// RUN:   --target=riscv64-unknown-elf --rtlib=compiler-rt --unwindlib=compiler-rt 2>&1 \
 // RUN:   | FileCheck -check-prefix=C-RV64-RTLIB-COMPILERRT-LP64 %s
 // C-RV64-RTLIB-COMPILERRT-LP64: "{{.*}}crt0.o"
 // C-RV64-RTLIB-COMPILERRT-LP64: "{{.*}}clang_rt.crtbegin-riscv64.o"
 // C-RV64-RTLIB-COMPILERRT-LP64: "--start-group" "-lc" "-lgloss" "--end-group" "{{.*}}libclang_rt.builtins-riscv64.a"
 // C-RV64-RTLIB-COMPILERRT-LP64: "{{.*}}clang_rt.crtend-riscv64.o"
 
 // RUN: %clang -### %s --target=riscv64 \
 // RUN:   --gcc-toolchain=%S/Inputs/basic_riscv64_tree --sysroot= \

clang/test/OpenMP/linking.c

 // Test the that the driver produces reasonable linker invocations with
 // -fopenmp or -fopenmp|libgomp.
 //
 // FIXME: Replace DEFAULT_OPENMP_LIB below with the value chosen at configure time.
 //
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
-// RUN:     -fopenmp -target i386-unknown-linux -rtlib=platform \
+// RUN:     -fopenmp -target i386-unknown-linux -rtlib=platform --unwindlib=platform \
 // RUN:   | FileCheck --check-prefix=CHECK-LD-32 %s
 // CHECK-LD-32: "{{.*}}ld{{(.exe)?}}"
 // CHECK-LD-32: "-l[[DEFAULT_OPENMP_LIB:[^"]*]]"
 // CHECK-LD-32: "-lpthread" "-lc"
 //
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
-// RUN:     -fopenmp -target x86_64-unknown-linux -rtlib=platform \
+// RUN:     -fopenmp -target x86_64-unknown-linux -rtlib=platform --unwindlib=platform \
 // RUN:   | FileCheck --check-prefix=CHECK-LD-64 %s
 // CHECK-LD-64: "{{.*}}ld{{(.exe)?}}"
 // CHECK-LD-64: "-l[[DEFAULT_OPENMP_LIB:[^"]*]]"
 // CHECK-LD-64: "-lpthread" "-lc"
 //
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
-// RUN:     -fopenmp=libgomp -target i386-unknown-linux -rtlib=platform \
+// RUN:     -fopenmp=libgomp -target i386-unknown-linux -rtlib=platform --unwindlib=platform \
 // RUN:   | FileCheck --check-prefix=CHECK-GOMP-LD-32 %s
 
-// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 -fopenmp-simd -target i386-unknown-linux -rtlib=platform | FileCheck --check-prefix SIMD-ONLY2 %s
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 -fopenmp-simd -target i386-unknown-linux -rtlib=platform --unwindlib=platform | FileCheck --check-prefix SIMD-ONLY2 %s
 // SIMD-ONLY2-NOT: lgomp
 // SIMD-ONLY2-NOT: lomp
 // SIMD-ONLY2-NOT: liomp
 // CHECK-GOMP-LD-32: "{{.*}}ld{{(.exe)?}}"
 // CHECK-GOMP-LD-32: "-lgomp" "-lrt"
 // CHECK-GOMP-LD-32: "-lpthread" "-lc"
 
-// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 -fopenmp-simd -target i386-unknown-linux -rtlib=platform | FileCheck --check-prefix SIMD-ONLY2 %s
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 -fopenmp-simd -target i386-unknown-linux -rtlib=platform --unwindlib=platform | FileCheck --check-prefix SIMD-ONLY2 %s
 // SIMD-ONLY2-NOT: lgomp
 // SIMD-ONLY2-NOT: lomp
 // SIMD-ONLY2-NOT: liomp
 //
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
-// RUN:     -fopenmp=libgomp -target x86_64-unknown-linux -rtlib=platform \
+// RUN:     -fopenmp=libgomp -target x86_64-unknown-linux -rtlib=platform --unwindlib=platform \
 // RUN:   | FileCheck --check-prefix=CHECK-GOMP-LD-64 %s
 // CHECK-GOMP-LD-64: "{{.*}}ld{{(.exe)?}}"
 // CHECK-GOMP-LD-64: "-lgomp" "-lrt"
 // CHECK-GOMP-LD-64: "-lpthread" "-lc"
 //
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
-// RUN:     -fopenmp -target i386-unknown-linux -rtlib=platform \
+// RUN:     -fopenmp -target i386-unknown-linux -rtlib=platform --unwindlib=platform \
 // RUN:   | FileCheck --check-prefix=CHECK-IOMP5-LD-32 %s
 // CHECK-IOMP5-LD-32: "{{.*}}ld{{(.exe)?}}"
 // CHECK-IOMP5-LD-32: "-l[[DEFAULT_OPENMP_LIB:[^"]*]]"
 // CHECK-IOMP5-LD-32: "-lpthread" "-lc"
 //
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
-// RUN:     -fopenmp -target x86_64-unknown-linux -rtlib=platform \
+// RUN:     -fopenmp -target x86_64-unknown-linux -rtlib=platform --unwindlib=platform \
 // RUN:   | FileCheck --check-prefix=CHECK-IOMP5-LD-64 %s
 // CHECK-IOMP5-LD-64: "{{.*}}ld{{(.exe)?}}"
 // CHECK-IOMP5-LD-64: "-l[[DEFAULT_OPENMP_LIB:[^"]*]]"
 // CHECK-IOMP5-LD-64: "-lpthread" "-lc"
 //
 // RUN: not %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     -fopenmp=lib -target i386-unknown-linux \
 // RUN:   | FileCheck --check-prefix=CHECK-LIB-LD-32 %s
 // CHECK-LIB-LD-32: error: unsupported argument 'lib' to option '-fopenmp='
 //
 // RUN: not %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     -fopenmp=lib -target x86_64-unknown-linux \
 // RUN:   | FileCheck --check-prefix=CHECK-LIB-LD-64 %s
 // CHECK-LIB-LD-64: error: unsupported argument 'lib' to option '-fopenmp='
 //
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     -fopenmp -fopenmp=libgomp -target i386-unknown-linux \
-// RUN:     -rtlib=platform \
+// RUN:     -rtlib=platform --unwindlib=platform \
 // RUN:   | FileCheck --check-prefix=CHECK-LD-OVERRIDE-32 %s
 // CHECK-LD-OVERRIDE-32: "{{.*}}ld{{(.exe)?}}"
 // CHECK-LD-OVERRIDE-32: "-lgomp" "-lrt"
 // CHECK-LD-OVERRIDE-32: "-lpthread" "-lc"
 //
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     -fopenmp -fopenmp=libgomp -target x86_64-unknown-linux \
-// RUN:     -rtlib=platform \
+// RUN:     -rtlib=platform --unwindlib=platform \
 // RUN:   | FileCheck --check-prefix=CHECK-LD-OVERRIDE-64 %s
 // CHECK-LD-OVERRIDE-64: "{{.*}}ld{{(.exe)?}}"
 // CHECK-LD-OVERRIDE-64: "-lgomp" "-lrt"
 // CHECK-LD-OVERRIDE-64: "-lpthread" "-lc"
 //
 // RUN: %clang -no-canonical-prefixes -fuse-ld=link %s -### -o %t.o 2>&1 \
-// RUN:     -fopenmp=libomp -target x86_64-msvc-win32 -rtlib=platform \
+// RUN:     -fopenmp=libomp -target x86_64-msvc-win32 -rtlib=platform --unwindlib=platform \
 // RUN:   | FileCheck --check-prefix=CHECK-MSVC-LINK-64 %s
 // CHECK-MSVC-LINK-64: link.exe
 // CHECK-MSVC-LINK-64-SAME: -nodefaultlib:vcomp.lib
 // CHECK-MSVC-LINK-64-SAME: -nodefaultlib:vcompd.lib
 // CHECK-MSVC-LINK-64-SAME: -libpath:{{.+}}/../lib
 // CHECK-MSVC-LINK-64-SAME: -defaultlib:libomp.lib
 
-// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 -fopenmp-simd -target x86_64-msvc-win32 -rtlib=platform | FileCheck --check-prefix SIMD-ONLY11 %s
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 -fopenmp-simd -target x86_64-msvc-win32 -rtlib=platform --unwindlib=platform | FileCheck --check-prefix SIMD-ONLY11 %s
 // SIMD-ONLY11-NOT: libiomp
 // SIMD-ONLY11-NOT: libomp
 // SIMD-ONLY11-NOT: libgomp
 //
 // RUN: %clang -no-canonical-prefixes %s -fuse-ld=link -### -o %t.o 2>&1 \
-// RUN:     -fopenmp=libiomp5 -target x86_64-msvc-win32 -rtlib=platform \
+// RUN:     -fopenmp=libiomp5 -target x86_64-msvc-win32 -rtlib=platform --unwindlib=platform \
 // RUN:   | FileCheck --check-prefix=CHECK-MSVC-ILINK-64 %s
 
-// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 -fopenmp-simd -target x86_64-msvc-win32 -rtlib=platform | FileCheck --check-prefix SIMD-ONLY11 %s
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 -fopenmp-simd -target x86_64-msvc-win32 -rtlib=platform --unwindlib=platform | FileCheck --check-prefix SIMD-ONLY11 %s
 // SIMD-ONLY11-NOT: libiomp
 // SIMD-ONLY11-NOT: libomp
 // SIMD-ONLY11-NOT: libgomp
 // CHECK-MSVC-ILINK-64: link.exe
 // CHECK-MSVC-ILINK-64-SAME: -nodefaultlib:vcomp.lib
 // CHECK-MSVC-ILINK-64-SAME: -nodefaultlib:vcompd.lib
 // CHECK-MSVC-ILINK-64-SAME: -libpath:{{.+}}/../lib
 // CHECK-MSVC-ILINK-64-SAME: -defaultlib:libiomp5md.lib
 //