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- removed obsolete probing of C++ standard for GCC and Clang

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CMake try_compile() function still requires explicit command line option
This commit is contained in:
alexey.lysiuk 2020-10-18 11:34:39 +03:00
parent 5ece08d12e
commit 34a8a9302f
2 changed files with 7 additions and 24 deletions
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7
CMakeLists.txt
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@ -146,6 +146,13 @@ endif()
if( ZD_CMAKE_COMPILER_IS_GNUCXX_COMPATIBLE ) if( ZD_CMAKE_COMPILER_IS_GNUCXX_COMPATIBLE )
set( PROFILE 0 CACHE BOOL "Enable profiling with gprof for Debug and RelWithDebInfo build types." ) set( PROFILE 0 CACHE BOOL "Enable profiling with gprof for Debug and RelWithDebInfo build types." )
if( CMAKE_CXX_STANDARD )
# By default, try_compile() invocations ignore CXX_STANDARD value
# CMake 3.8 and newer have CMP0067 policy that fixes the issue, but it should be enabled explicitly
# Older versions require manual specification of the corresponding command line option
set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++${CMAKE_CXX_STANDARD}" )
endif()
endif() endif()
# Fast math flags, required by some subprojects # Fast math flags, required by some subprojects

24
src/CMakeLists.txt
View file

@ -330,30 +330,6 @@ if( ZD_CMAKE_COMPILER_IS_GNUCXX_COMPATIBLE )
set( CMAKE_CXX_FLAGS "-DNO_SSE ${CMAKE_CXX_FLAGS}" ) set( CMAKE_CXX_FLAGS "-DNO_SSE ${CMAKE_CXX_FLAGS}" )
endif() endif()
# Use the highest C++ standard available since VS2015 compiles with C++14
# but we only require C++11. The recommended way to do this in CMake is to
# probably to use target_compile_features, but I don't feel like maintaining
# a list of features we use.
CHECK_CXX_COMPILER_FLAG( "-std=gnu++14" CAN_DO_CPP14 )
if ( CAN_DO_CPP14 )
set ( CMAKE_CXX_FLAGS "-std=gnu++14 ${CMAKE_CXX_FLAGS}" )
else ()
CHECK_CXX_COMPILER_FLAG( "-std=gnu++1y" CAN_DO_CPP1Y )
if ( CAN_DO_CPP1Y )
set ( CMAKE_CXX_FLAGS "-std=gnu++1y ${CMAKE_CXX_FLAGS}" )
else ()
CHECK_CXX_COMPILER_FLAG( "-std=gnu++11" CAN_DO_CPP11 )
if ( CAN_DO_CPP11 )
set ( CMAKE_CXX_FLAGS "-std=gnu++11 ${CMAKE_CXX_FLAGS}" )
else ()
CHECK_CXX_COMPILER_FLAG( "-std=gnu++0x" CAN_DO_CPP0X )
if ( CAN_DO_CPP0X )
set ( CMAKE_CXX_FLAGS "-std=gnu++0x ${CMAKE_CXX_FLAGS}" )
endif ()
endif ()
endif ()
endif ()
# Remove extra warnings when using the official DirectX headers. # Remove extra warnings when using the official DirectX headers.
# Also, TDM-GCC 4.4.0 no longer accepts glibc-style printf formats as valid, # Also, TDM-GCC 4.4.0 no longer accepts glibc-style printf formats as valid,
# which is a royal pain. The previous version I had been using was fine with them. # which is a royal pain. The previous version I had been using was fine with them.