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[cmake] Use -std=gnu++11 to fix alloca() on NetBSD 

Prefer using '-std=gnu++11' over '-std=c++11' when available, as NetBSD
exposes the correct alloca() implementation only with gnu* C/C++
standards.

Differential Revision: https://reviews.llvm.org/D55477

llvm-svn: 348854
This commit is contained in:
Michal Gorny 2018-12-11 15:39:22 +00:00
parent b51283bfd7
commit e9d4267277
2 changed files with 6 additions and 2 deletions
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5
openmp/cmake/HandleOpenMPOptions.cmake
View File

@ -13,4 +13,7 @@ if (${OPENMP_ENABLE_WERROR})
append_if(OPENMP_HAVE_WERROR_FLAG "-Werror" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
endif()
append_if(OPENMP_HAVE_STD_CPP11_FLAG "-std=c++11" CMAKE_CXX_FLAGS)
append_if(OPENMP_HAVE_STD_GNUPP11_FLAG "-std=gnu++11" CMAKE_CXX_FLAGS)
if (NOT OPENMP_HAVE_STD_GNUPP11_FLAG)
append_if(OPENMP_HAVE_STD_CPP11_FLAG "-std=c++11" CMAKE_CXX_FLAGS)
endif()

3
openmp/cmake/config-ix.cmake
View File

@ -3,4 +3,5 @@ include(CheckCXXCompilerFlag)
check_c_compiler_flag(-Werror OPENMP_HAVE_WERROR_FLAG)
check_cxx_compiler_flag(-std=c++11 OPENMP_HAVE_STD_CPP11_FLAG)
check_cxx_compiler_flag(-std=gnu++11 OPENMP_HAVE_STD_GNUPP11_FLAG)
check_cxx_compiler_flag(-std=c++11 OPENMP_HAVE_STD_CPP11_FLAG)