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[compiler-rt] Support for passing through linker flags to libc++ build 

This may be needed when cross-compiling to certain platforms.

Differential Revision: https://reviews.llvm.org/D54027

llvm-svn: 346063
This commit is contained in:
Petr Hosek 2018-11-03 01:38:26 +00:00
parent 2bcb288ade
commit 4dc4d6eaca
1 changed files with 7 additions and 2 deletions
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9
compiler-rt/cmake/Modules/AddCompilerRT.cmake
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@ -551,6 +551,9 @@ macro(add_custom_libcxx name prefix)
set(PASSTHROUGH_VARIABLES
CMAKE_C_COMPILER_TARGET
CMAKE_CXX_COMPILER_TARGET
CMAKE_SHARED_LINKER_FLAGS
CMAKE_MODULE_LINKER_FLAGS
CMAKE_EXE_LINKER_FLAGS
CMAKE_INSTALL_PREFIX
CMAKE_MAKE_PROGRAM
CMAKE_LINKER
@ -563,8 +566,10 @@ macro(add_custom_libcxx name prefix)
CMAKE_SYSROOT
CMAKE_SYSTEM_NAME)
foreach(variable ${PASSTHROUGH_VARIABLES})
if(${variable})
list(APPEND CMAKE_PASSTHROUGH_VARIABLES -D${variable}=${${variable}})
get_property(is_value_set CACHE ${variable} PROPERTY VALUE SET)
if(${is_value_set})
get_property(value CACHE ${variable} PROPERTY VALUE)
list(APPEND CMAKE_PASSTHROUGH_VARIABLES -D${variable}=${value})
endif()
endforeach()