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[C++11] Switch the CMake option from LLVM_ENABLE_CXX11 (default on) to

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LLVM_ENABLE_CXX1Y (default *off*). =D C++98 is dead. Long live C++11.

I don't exactly recommend using C++1y just yet though...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202567 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chandler Carruth 2014-03-01 03:16:07 +00:00
parent f468dea807
commit b23750a8ae
2 changed files with 11 additions and 4 deletions
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2
CMakeLists.txt
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@ -198,7 +198,7 @@ else( MSVC )
option(LLVM_ENABLE_WARNINGS "Enable compiler warnings." ON)
endif()
option(LLVM_ENABLE_CXX11 "Compile with C++11 enabled." ON)
option(LLVM_ENABLE_CXX1Y "Compile with C++1y enabled." OFF)
option(LLVM_ENABLE_LIBCXX "Use libc++ if available." OFF)
option(LLVM_ENABLE_PEDANTIC "Compile with pedantic enabled." ON)
option(LLVM_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF)

13
cmake/modules/HandleLLVMOptions.cmake
View File

@ -287,10 +287,17 @@ elseif( LLVM_COMPILER_IS_GCC_COMPATIBLE )
if (LLVM_ENABLE_WERROR)
add_llvm_definitions( -Werror )
endif (LLVM_ENABLE_WERROR)
if (LLVM_ENABLE_CXX11)
if (LLVM_ENABLE_CXX1Y)
check_cxx_compiler_flag("-std=c++1y" CXX_SUPPORTS_CXX1Y)
append_if(CXX_SUPPORTS_CXX1Y "-std=c++1y" CMAKE_CXX_FLAGS)
else()
check_cxx_compiler_flag("-std=c++11" CXX_SUPPORTS_CXX11)
append_if(CXX_SUPPORTS_CXX11 "-std=c++11" CMAKE_CXX_FLAGS)
endif (LLVM_ENABLE_CXX11)
if (CXX_SUPPORTS_CXX11)
append("-std=c++11" CMAKE_CXX_FLAGS)
else()
message(FATAL_ERROR "LLVM requires C++11 support but the '-std=c++11' flag isn't supported.")
endif()
endif()
endif( MSVC )
macro(append_common_sanitizer_flags)