Android.rules: add support for clang compiler

[labath]

Summary

building executables with the NDK clang requires -target and
-gcc-toolchain arguments.

packages/Python/lldbsuite/test/make/Android.rules

 else
   # lowest supported 32-bit API level
   API_LEVEL := 9
 endif
 
 ifeq "$(ARCH)" "arm"
   SYSROOT_ARCH := arm
   STL_ARCH := armeabi-v7a
+  TRIPLE_ARCH := armv7
   ARCH_CFLAGS += -march=armv7-a -mfloat-abi=softfp -mfpu=vfpv3-d16 -marm
 else ifeq "$(ARCH)" "aarch64"
   SYSROOT_ARCH := arm64
+  TRIPLE_ARCH := aarch64
   STL_ARCH := arm64-v8a
 else ifeq "$(ARCH)" "i386"
   SYSROOT_ARCH := x86
   STL_ARCH := x86
+  TRIPLE_ARCH := i686
 else ifeq "$(ARCH)" "mips64r6"
   SYSROOT_ARCH := mips64
   STL_ARCH := mips64
+  TRIPLE_ARCH := mips64el
 else ifeq "$(ARCH)" "mips32"
   SYSROOT_ARCH := mips
   STL_ARCH := mips
+  TRIPLE_ARCH := mipsel
 else
   SYSROOT_ARCH := $(ARCH)
   STL_ARCH := $(ARCH)
+  TRIPLE_ARCH := $(ARCH)
+endif
+
+ifeq "$(findstring 86,$(ARCH))" "86"
+  TOOLCHAIN_DIR := $(STL_ARCH)-4.9
+else
+  TOOLCHAIN_DIR := $(TRIPLE_ARCH)-linux-android-4.9
+endif
+
+ifeq "$(HOST_OS)" "Linux"
+  HOST_TAG := linux-x86_64
+else ifeq "$(HOST_OS)" "Darwin"
+  HOST_TAG := darwin-x86_64
+else
+  HOST_TAG := windows-x86_64
+endif
+
+ifeq "$(findstring clang,$(CC))" "clang"
+  ARCH_CFLAGS += \
+    -target $(TRIPLE_ARCH)-none-linux-android \
+    -gcc-toolchain $(NDK_ROOT)/toolchains/$(TOOLCHAIN_DIR)/prebuilt/$(HOST_TAG)
+  ARCH_LDFLAGS += \
+    -target $(TRIPLE_ARCH)-none-linux-android \
+    -gcc-toolchain $(NDK_ROOT)/toolchains/$(TOOLCHAIN_DIR)/prebuilt/$(HOST_TAG)
 endif
 
 ARCH_CFLAGS += \
   --sysroot=$(NDK_ROOT)/platforms/android-$(API_LEVEL)/arch-$(SYSROOT_ARCH) \
   -isystem $(NDK_ROOT)/sources/cxx-stl/gnu-libstdc++/4.9/include \
   -isystem $(NDK_ROOT)/sources/cxx-stl/gnu-libstdc++/4.9/libs/$(STL_ARCH)/include \
   -isystem $(NDK_ROOT)/sources/cxx-stl/gnu-libstdc++/4.9/include/backward
 ARCH_LDFLAGS += -lm \
   $(NDK_ROOT)/sources/cxx-stl/gnu-libstdc++/4.9/libs/$(STL_ARCH)/libgnustl_static.a \
   --sysroot=$(NDK_ROOT)/platforms/android-$(API_LEVEL)/arch-$(SYSROOT_ARCH)

packages/Python/lldbsuite/test/make/Makefile.rules

 # Uncomment line below for debugging shell commands
 # SHELL = /bin/sh -x
 
 THIS_FILE_DIR := $(shell dirname $(realpath $(lastword $(MAKEFILE_LIST))))/
 LLDB_BASE_DIR := $(THIS_FILE_DIR)../../../../../
 
 
 #----------------------------------------------------------------------
+# If OS is not defined, use 'uname -s' to determine the OS name.
+#
+# uname on Windows gives "windows32", but most environments standardize
+# on "Windows_NT", so we'll make it consistent here.  When running
+# tests from Visual Studio, the environment variable isn't inherited
+# all the way down to the process spawned for make.
+#----------------------------------------------------------------------
+HOST_OS = $(shell uname -s)
+ifeq "$(HOST_OS)" "windows32"
+  HOST_OS = Windows_NT
+endif
+ifeq "$(OS)" ""
+  OS = $(HOST_OS)
+endif
+
+#----------------------------------------------------------------------
 # If TRIPLE is not defined try to set the ARCH, CC, CFLAGS, and more
 # from the triple alone
 #----------------------------------------------------------------------
 ARCH_CFLAGS :=
 ifneq "$(TRIPLE)" ""
   triple_space = $(subst -, ,$(TRIPLE))
   ARCH =$(word 1, $(triple_space))
   TRIPLE_VENDOR =$(word 2, $(triple_space))
ifeq "$(TRIPLE_VENDOR)" "apple"
     endif
   endif
 endif
 ifeq "$(OS)" "Android"
   include $(THIS_FILE_DIR)/Android.rules
 endif
 
 #----------------------------------------------------------------------
-# If OS is not defined, use 'uname -s' to determine the OS name.
-#
-# uname on Windows gives "windows32", but most environments standardize
-# on "Windows_NT", so we'll make it consistent here.  When running
-# tests from Visual Studio, the environment variable isn't inherited
-# all the way down to the process spawned for make.
-#----------------------------------------------------------------------
-HOST_OS = $(shell uname -s)
-ifeq "$(HOST_OS)" "windows32"
-  HOST_OS = Windows_NT
-endif
-ifeq "$(OS)" ""
-  OS = $(HOST_OS)
-endif
-
-#----------------------------------------------------------------------
 # If ARCH is not defined, default to x86_64.
 #----------------------------------------------------------------------
 ifeq "$(ARCH)" ""
 ifeq "$(OS)" "Windows_NT"
   ARCH = x86
 else
   ARCH = x86_64
 endif