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[libc++abi] Link against libSystem on Apple platforms 

On Apple platforms, libSystem is an umbrella for all other system
libraries, and libpthread (and friends) are actually just symlinks
to libSystem.

llvm-svn: 373770
This commit is contained in:
Louis Dionne 2019-10-04 18:32:46 +00:00
parent 5fd467feb8
commit ce452b1ca9
2 changed files with 9 additions and 3 deletions
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1
libcxxabi/cmake/config-ix.cmake
View File

@ -75,3 +75,4 @@ check_library_exists(dl dladdr "" LIBCXXABI_HAS_DL_LIB)
check_library_exists(pthread pthread_once "" LIBCXXABI_HAS_PTHREAD_LIB)
check_library_exists(c __cxa_thread_atexit_impl ""
LIBCXXABI_HAS_CXA_THREAD_ATEXIT_IMPL)
check_library_exists(System write "" LIBCXXABI_HAS_SYSTEM_LIB)

11
libcxxabi/src/CMakeLists.txt
View File

@ -60,11 +60,16 @@ if (LIBCXXABI_HAS_CXA_THREAD_ATEXIT_IMPL)
add_definitions(-DHAVE___CXA_THREAD_ATEXIT_IMPL)
endif()
if (LIBCXXABI_ENABLE_THREADS)
add_library_flags_if(LIBCXXABI_HAS_PTHREAD_LIB pthread)
if (APPLE)
add_library_flags_if(LIBCXXABI_HAS_SYSTEM_LIB System)
else()
if (LIBCXXABI_ENABLE_THREADS)
add_library_flags_if(LIBCXXABI_HAS_PTHREAD_LIB pthread)
endif()
add_library_flags_if(LIBCXXABI_HAS_C_LIB c)
endif()
add_library_flags_if(LIBCXXABI_HAS_C_LIB c)
if (LIBCXXABI_USE_LLVM_UNWINDER)
# Prefer using the in-tree version of libunwind, either shared or static. If
# none are found fall back to using -lunwind.