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libc++: add an option to build against compiler-rt 

This mirrors the option in libc++abi to build without libgcc.

llvm-svn: 279606
This commit is contained in:
Saleem Abdulrasool 2016-08-24 04:22:52 +00:00
parent eb232dc90d
commit e81fcb81dc
2 changed files with 8 additions and 1 deletions
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5
libcxx/CMakeLists.txt
View File

@ -68,6 +68,7 @@ option(LIBCXX_INSTALL_SUPPORT_HEADERS "Install libc++ support headers." ON)
option(LIBCXX_INSTALL_EXPERIMENTAL_LIBRARY "Install libc++experimental.a" OFF)
set(LIBCXX_ABI_VERSION 1 CACHE STRING "ABI version of libc++.")
option(LIBCXX_ABI_UNSTABLE "Unstable ABI of libc++." OFF)
option(LIBCXX_USE_COMPILER_RT "Use compiler-rt instead of libgcc" OFF)
if (NOT LIBCXX_ENABLE_SHARED AND NOT LIBCXX_ENABLE_STATIC)
message(FATAL_ERROR "libc++ must be built as either a shared or static library.")
@ -277,6 +278,10 @@ add_target_flags_if(LIBCXX_GCC_TOOLCHAIN "-gcc-toolchain ${LIBCXX_GCC_TOOLCHAIN}
# Configure compiler.
include(config-ix)
if (LIBCXX_USE_COMPILER_RT)
list(APPEND LIBCXX_LINK_FLAGS "-rtlib=compiler-rt")
endif()
# Configure coverage options.
if (LIBCXX_GENERATE_COVERAGE)
include(CodeCoverage)

4
libcxx/cmake/config-ix.cmake
View File

@ -17,4 +17,6 @@ check_library_exists(pthread pthread_create "" LIBCXX_HAS_PTHREAD_LIB)
check_library_exists(c fopen "" LIBCXX_HAS_C_LIB)
check_library_exists(m ccos "" LIBCXX_HAS_M_LIB)
check_library_exists(rt clock_gettime "" LIBCXX_HAS_RT_LIB)
check_library_exists(gcc_s __gcc_personality_v0 "" LIBCXX_HAS_GCC_S_LIB)
if (NOT LIBCXX_USE_COMPILER_RT)
check_library_exists(gcc_s __gcc_personality_v0 "" LIBCXX_HAS_GCC_S_LIB)
endif()