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check for 32bit lib atomic

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badaix 2019-10-28 21:19:48 +01:00
parent ef36b406f5
commit 7d8e77cfc0
1 changed files with 34 additions and 36 deletions
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12
cmake/CheckAtomic.cmake
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@ -105,11 +105,9 @@ set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS})
endfunction(check_working_cxx_atomics64_2args) endfunction(check_working_cxx_atomics64_2args)
# This isn't necessary on MSVC, so avoid command-line switch annoyance
# by only running on GCC-like hosts.
if (LLVM_COMPILER_IS_GCC_COMPATIBLE)
# First check if atomics work without the library. # First check if atomics work without the library.
check_working_cxx_atomics(HAVE_CXX_ATOMICS_WITHOUT_LIB) check_working_cxx_atomics(HAVE_CXX_ATOMICS_WITHOUT_LIB)
# If not, check if the library exists, and atomics work with it. # If not, check if the library exists, and atomics work with it.
if(NOT HAVE_CXX_ATOMICS_WITHOUT_LIB) if(NOT HAVE_CXX_ATOMICS_WITHOUT_LIB)
check_library_exists(atomic __atomic_fetch_add_4 "" HAVE_LIBATOMIC) check_library_exists(atomic __atomic_fetch_add_4 "" HAVE_LIBATOMIC)
@ -123,10 +121,6 @@ if (LLVM_COMPILER_IS_GCC_COMPATIBLE)
message(FATAL_ERROR "Host compiler must support std::atomic!") message(FATAL_ERROR "Host compiler must support std::atomic!")
endif() endif()
else() else()
message(FATAL_ERROR "Host compiler appears to require libatomic, but cannot find it.")
endif()
endif()
endif()
# Check for 64 bit atomic operations. # Check for 64 bit atomic operations.
if(MSVC) if(MSVC)
set(HAVE_CXX_ATOMICS64_WITHOUT_LIB True) set(HAVE_CXX_ATOMICS64_WITHOUT_LIB True)
@ -151,3 +145,7 @@ if( NOT HAVE_CXX_ATOMICS64_WITHOUT_LIB )
endif() endif()
endif() endif()
endif()
endif()