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[CMake] Don't pass all LLVM_COMPILE_FLAGS to the C compiler

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GCC (unlike clang!) warns about C++ flags when compiling C.

https://reviews.llvm.org/D67171

llvm-svn: 371521
This commit is contained in:
David Zarzycki 2019-09-10 14:19:52 +00:00
parent 64810143df
commit 99a2867820
1 changed files with 8 additions and 1 deletions
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9
cmake/modules/AddLLVM.cmake
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@ -8,6 +8,8 @@ function(llvm_update_compile_flags name)
set(update_src_props ON)
endif()
list(APPEND LLVM_COMPILE_CFLAGS " ${LLVM_COMPILE_FLAGS}")
# LLVM_REQUIRES_EH is an internal flag that individual targets can use to
# force EH
if(LLVM_REQUIRES_EH OR LLVM_ENABLE_EH)
@ -54,14 +56,19 @@ function(llvm_update_compile_flags name)
# - LLVM_COMPILE_FLAGS is list.
# - PROPERTY COMPILE_FLAGS is string.
string(REPLACE ";" " " target_compile_flags " ${LLVM_COMPILE_FLAGS}")
string(REPLACE ";" " " target_compile_cflags " ${LLVM_COMPILE_CFLAGS}")
if(update_src_props)
foreach(fn ${sources})
get_filename_component(suf ${fn} EXT)
if("${suf}" STREQUAL ".cpp" OR "${suf}" STREQUAL ".c")
if("${suf}" STREQUAL ".cpp")
set_property(SOURCE ${fn} APPEND_STRING PROPERTY
COMPILE_FLAGS "${target_compile_flags}")
endif()
if("${suf}" STREQUAL ".c")
set_property(SOURCE ${fn} APPEND_STRING PROPERTY
COMPILE_FLAGS "${target_compile_cflags}")
endif()
endforeach()
else()
# Update target props, since all sources are C++.