[cfe-dev] Building clang on OSX

[David Greene via cfe-dev]

I'm attempting to build clang/compiler-rt/lld/libc++ on OSX using ninja.
I get the errors below from lld when running unit tests.  It appears
that clang doesn't know or isn't providing the necessary link paths for
system libraries to lld.

I haven't be able to find many guides about building clang on OSX.  The
ones I have found use Xcode but for various reasons I would rather not
have to do that.  Is Xcode the only way to build clang on OSX?  If not,
is there a CMake variable or other setting that tells clang or lld where
the system libraries are?

Thanks for any help!

                      -David


FAIL: Builtins :: TestCases/Darwin/os_version_check_test_no_core_foundation.c (1 of 2)
******************** TEST 'Builtins :: TestCases/Darwin/os_version_check_test_no_core_foundation.c' FAILED ********************
Script:
--
: 'RUN: at line 1';      /Users/greened/llvm-project/build/x86_64/./bin/clang  /Users/greened/llvm-project/llvm-project/compiler-rt/test/builtins/TestCases/Darwin/os_version_check_test_no_core_foundation.c -o /Users/greened/llvm-project/build/x86_64/projects/compiler-rt/test/builtins/TestCases/Darwin/Output/os_version_check_test_no_core_foundation.c.tmp -mmacosx-version-min=10.6
: 'RUN: at line 2';    /Users/greened/llvm-project/build/x86_64/projects/compiler-rt/test/builtins/TestCases/Darwin/Output/os_version_check_test_no_core_foundation.c.tmp
--
Exit Code: 1

Command Output (stderr):
--
ld64.lld: warning: ignoring unknown argument: -no_deduplicate
ld64.lld: warning: -sdk_version is required when emitting min version load command.  Setting sdk version to match provided min version
ld64.lld: error: Unable to find library for -lSystem
clang-9: error: linker command failed with exit code 1 (use -v to see invocation)

******************** TEST 'Builtins :: TestCases/Darwin/os_version_check_test.c' FAILED ********************
Script:
--
: 'RUN: at line 1';      /Users/greened/llvm-project/build/x86_64/./bin/clang  /Users/greened/llvm-project/llvm-project/compiler-rt/test/builtins/TestCases/Darwin/os_version_check_test.c -o /Users/greened/llvm-project/build/x86_64/projects/compiler-rt/test/builtins/TestCases/Darwin/Output/os_version_check_test.c.tmp -mmacosx-version-min=10.6 -framework CoreFoundation -DMAJOR=10 -DMINOR=14 -DSUBMINOR=3
: 'RUN: at line 2';    /Users/greened/llvm-project/build/x86_64/projects/compiler-rt/test/builtins/TestCases/Darwin/Output/os_version_check_test.c.tmp
--
Exit Code: 1

Command Output (stderr):
--
ld64.lld: warning: ignoring unknown argument: -no_deduplicate
ld64.lld: warning: -sdk_version is required when emitting min version load command.  Setting sdk version to match provided min version
ld64.lld: error: Unable to find framework for -framework CoreFoundation
clang-9: error: linker command failed with exit code 1 (use -v to see invocation)