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Detect compiler flags and append to default CMake flags

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This commit is contained in:
Matt Clarkson 2014-08-01 10:48:16 +01:00
parent 4940eebf65
commit e863292dcc
1 changed files with 37 additions and 3 deletions
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40
CMakeLists.txt
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@ -20,9 +20,43 @@ include_directories(${source_dir}/include)
ExternalProject_Get_Property(googletest binary_dir)
link_directories(${binary_dir})
set(CMAKE_CXX_FLAGS "-Wall -Werror -pedantic-errors --std=c++0x")
set(CMAKE_CXX_FLAGS_DEBUG "-g -O0 -DDEBUG")
set(CMAKE_CXX_FLAGS_RELEASE "-fno-strict-aliasing -O3 -DNDEBUG")
# Set up the compiler flags
include(CheckCXXCompilerFlag)
# Enable the latest C++ standard possible
check_cxx_compiler_flag(--std=c++14 HAVE_FLAG_CXX_14)
check_cxx_compiler_flag(--std=c++11 HAVE_FLAG_CXX_11)
check_cxx_compiler_flag(--std=c++0x HAVE_FLAG_CXX_0X)
if (HAVE_FLAG_CXX_14)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} --std=c++14")
elseif (HAVE_FLAG_CXX_11)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} --std=c++11")
elseif (HAVE_FLAG_CXX_0X)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} --std=c++0x")
endif()
# Turn compiler warnings up to 11
check_cxx_compiler_flag(-Wall HAVE_FLAG_WALL)
if (HAVE_FLAG_WALL)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
endif()
check_cxx_compiler_flag(-Werror HAVE_FLAG_WERROR)
if (HAVE_FLAG_WERROR)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror")
endif()
check_cxx_compiler_flag(-pedantic-errors HAVE_FLAG_PEDANTIC_ERRORS)
if (HAVE_FLAG_PEDANTIC_ERRORS)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pedantic-errors")
endif()
# Add a debug definition so we can make decisions in the compilation
set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -DDEBUG")
# We relax the aliasing in release
check_cxx_compiler_flag(-fno-strict-aliasing HAVE_FLAG_NO_STRICT_ALIASING)
if (HAVE_FLAG_NO_STRICT_ALIASING)
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -fno-strict-aliasing")
endif()
# Set OS
if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")