[lld/mac] Make -v print version and search paths in additon to linking, not instead of linking

[thakis]

Summary

This matches ld64's behavior.

lld/MachO/Driver.cpp

if (args.hasArg(OPT_v)) {
     message(StringRef("Library search paths:") +
             (config->librarySearchPaths.size()
                  ? "\n\t" + join(config->librarySearchPaths, "\n\t")
                  : ""));
     message(StringRef("Framework search paths:") +
             (config->frameworkSearchPaths.size()
                  ? "\n\t" + join(config->frameworkSearchPaths, "\n\t")
                  : ""));
-    freeArena();
-    return !errorCount();
   }
 
   initLLVM(); // must be run before any call to addFile()
 
   for (const auto &arg : args) {
     const auto &opt = arg->getOption();
     warnIfDeprecatedOption(opt);
     warnIfUnimplementedOption(opt);

lld/MachO/Options.td

def bitcode_symbol_map : Separate<["-"], "bitcode_symbol_map">,
      MetaVarName<"<path>">,
      HelpText<"Write the bitcode symbol reverse mapping to file <path>, or if a directory, to <path>/UUID.bcsymbolmap">,
      Flags<[HelpHidden]>,
      Group<grp_bitcode>;
 
 def grp_rare : OptionGroup<"rare">, HelpText<"RARELY USED">;
 
 def v : Flag<["-"], "v">,
-     HelpText<"Print the linker version and search paths and exit">,
+     HelpText<"Print the linker version and search paths in addition to linking">,
      Group<grp_rare>;
 def adhoc_codesign : Flag<["-"], "adhoc_codesign">,
      HelpText<"Write an ad-hoc code signature to the output file.">,
      Flags<[HelpHidden]>,
      Group<grp_rare>;
 def no_adhoc_codesign : Flag<["-"], "no_adhoc_codesign">,
      HelpText<"Do not write an ad-hoc code signature to the output file.">,
      Group<grp_rare>;

lld/test/MachO/silent-ignore.test

-RUN: %lld -v \
+RUN: %lld --version \
 RUN:   -dynamic \
 RUN:   -no_deduplicate \
 RUN:   -lto_library /lib/foo \
 RUN:   -macosx_version_min 0 \
 RUN:   -dependency_info /path/to/dependency_info.dat \
 RUN:   -lto_library ../lib/libLTO.dylib \
 RUN:   -mllvm -time-passes \
 RUN:   -objc_abi_version 2 \
 RUN:   -ios_simulator_version_min 9.0.0 \
 RUN:   -sdk_version 13.2
 RUN: not %lld -v --not-an-ignored-argument 2>&1 | FileCheck %s
 CHECK: error: unknown argument '--not-an-ignored-argument'

lld/test/MachO/syslibroot.test

 # Ensure that a nonexistent path is ignored with a syslibroot
 
-RUN: ld64.lld -v -syslibroot /var/empty | FileCheck %s -check-prefix CHECK-NONEXISTENT-SYSLIBROOT
+RUN: ld64.lld -v -dylib -o /dev/null -syslibroot /var/empty | FileCheck %s -check-prefix CHECK-NONEXISTENT-SYSLIBROOT
 
 CHECK-NONEXISTENT-SYSLIBROOT: Library search paths:
 CHECK-NONEXISTENT-SYSLIBROOT-NEXT: Framework search paths:
 
 RUN: mkdir -p %t/usr/lib
-RUN: ld64.lld -v -syslibroot %t 2>&1 | FileCheck %s -check-prefix CHECK-SYSLIBROOT -DROOT=%t
+RUN: ld64.lld -v -dylib -o /dev/null -syslibroot %t 2>&1 | FileCheck %s -check-prefix CHECK-SYSLIBROOT -DROOT=%t
 
 CHECK-SYSLIBROOT-NOT: directory not found{{.*}}usr/local/lib
 CHECK-SYSLIBROOT: Library search paths:
 CHECK-SYSLIBROOT-NEXT: [[ROOT]]/usr/lib
 
 RUN: mkdir -p %t/Library/libxml2-development
-RUN: ld64.lld -v -syslibroot %t -L /Library/libxml2-development | FileCheck %s -check-prefix CHECK-ABSOLUTE-PATH-REROOTED -DROOT=%t
+RUN: ld64.lld -v -dylib -o /dev/null -syslibroot %t -L /Library/libxml2-development | FileCheck %s -check-prefix CHECK-ABSOLUTE-PATH-REROOTED -DROOT=%t
 
 CHECK-ABSOLUTE-PATH-REROOTED: Library search paths:
 CHECK-ABSOLUTE-PATH-REROOTED: [[ROOT]]/Library/libxml2-development
 CHECK-ABSOLUTE-PATH-REROOTED: [[ROOT]]/usr/lib
 
-RUN: ld64.lld -v -syslibroot %t -L %t/Library/libxml2-development | FileCheck %s -check-prefix CHECK-PATH-WITHOUT-REROOT -DPATH=%t/Library/libxml2-development
+RUN: ld64.lld -v -dylib -o /dev/null -syslibroot %t -L %t/Library/libxml2-development | FileCheck %s -check-prefix CHECK-PATH-WITHOUT-REROOT -DPATH=%t/Library/libxml2-development
 CHECK-PATH-WITHOUT-REROOT:      Library search paths:
 CHECK-PATH-WITHOUT-REROOT-NEXT: [[PATH]]
 
 RUN: mkdir -p %t.2/usr/lib
-RUN: ld64.lld -v -syslibroot %t -syslibroot %t.2 | FileCheck %s -check-prefix CHECK-SYSLIBROOT-MATRIX -DROOT=%t
+RUN: ld64.lld -v -dylib -o /dev/null -syslibroot %t -syslibroot %t.2 | FileCheck %s -check-prefix CHECK-SYSLIBROOT-MATRIX -DROOT=%t
 
 CHECK-SYSLIBROOT-MATRIX: Library search paths:
 CHECK-SYSLIBROOT-MATRIX: [[ROOT]]/usr/lib
 CHECK-SYSLIBROOT-MATRIX: [[ROOT]].2/usr/lib
 
-RUN: ld64.lld -v -syslibroot %t -syslibroot %t.2 -syslibroot / | FileCheck %s -check-prefix CHECK-SYSLIBROOT-IGNORED -DROOT=%t
+RUN: ld64.lld -v -dylib -o /dev/null -syslibroot %t -syslibroot %t.2 -syslibroot / | FileCheck %s -check-prefix CHECK-SYSLIBROOT-IGNORED -DROOT=%t
 
 CHECK-SYSLIBROOT-IGNORED: Library search paths:
 CHECK-SYSLIBROOT-IGNORED-NOT: [[ROOT]]/usr/lib
 CHECK-SYSLIBROOT-IGNORED-NOT: [[ROOT]].2/usr/lib
 
 RUN: mkdir -p %t/System/Library/Frameworks
-RUN: ld64.lld -v -syslibroot %t | FileCheck %s -check-prefix CHECK-SYSLIBROOT-FRAMEWORK -DROOT=%t
+RUN: ld64.lld -v -dylib -o /dev/null -syslibroot %t | FileCheck %s -check-prefix CHECK-SYSLIBROOT-FRAMEWORK -DROOT=%t
 
 CHECK-SYSLIBROOT-FRAMEWORK: Framework search paths:
 CHECK-SYSLIBROOT-FRAMEWORK: [[ROOT]]/System/Library/Frameworks
 
 RUN: mkdir -p %t/Library/Frameworks
 RUN: mkdir -p %t.2/Library/Frameworks
-RUN: ld64.lld -v -syslibroot %t -syslibroot %t.2 -F /Library/Frameworks | FileCheck %s -check-prefix CHECK-SYSLIBROOT-FRAMEWORK-MATRIX -DROOT=%t
+RUN: ld64.lld -v -dylib -o /dev/null -syslibroot %t -syslibroot %t.2 -F /Library/Frameworks | FileCheck %s -check-prefix CHECK-SYSLIBROOT-FRAMEWORK-MATRIX -DROOT=%t
 
 CHECK-SYSLIBROOT-FRAMEWORK-MATRIX: Framework search paths:
 CHECK-SYSLIBROOT-FRAMEWORK-MATRIX: [[ROOT]]/Library/Frameworks
 CHECK-SYSLIBROOT-FRAMEWORK-MATRIX: [[ROOT]].2/Library/Frameworks
 
-RUN: ld64.lld -v -syslibroot %t -syslibroot %t.2 -syslibroot / -F /Library/Frameworks | FileCheck %s -check-prefix CHECK-SYSLIBROOT-FRAMEWORK-IGNORED -DROOT=%t
+RUN: ld64.lld -v -dylib -o /dev/null -syslibroot %t -syslibroot %t.2 -syslibroot / -F /Library/Frameworks | FileCheck %s -check-prefix CHECK-SYSLIBROOT-FRAMEWORK-IGNORED -DROOT=%t
 
 CHECK-SYSLIBROOT-FRAMEWORK-IGNORED: Framework search paths:
 CHECK-SYSLIBROOT-FRAMEWORK-IGNORED-NOT: [[ROOT]]/Library/Frameworks
 CHECK-SYSLIBROOT-FRAMEWORK-IGNORED-NOT: [[ROOT]].2/Library/Frameworks