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# Build type link flags
set (CMAKE_LINK_FLAGS_RELEASE " " CACHE INTERNAL "Link flags for release" FORCE)
set (CMAKE_LINK_FLAGS_RELWITHDEBINFO " " CACHE INTERNAL "Link flags for release with debug support" FORCE)
set (CMAKE_LINK_FLAGS_DEBUG " " CACHE INTERNAL "Link flags for debug" FORCE)
set (CMAKE_LINK_FLAGS_PROFILE " -pg" CACHE INTERNAL "Link flags for profile" FORCE)
set (CMAKE_LINK_FLAGS_COVERAGE " --coverage" CACHE INTERNAL "Link flags for static code coverage" FORCE)
set (CMAKE_C_FLAGS_RELEASE "")
if (NOT "${CMAKE_CXX_COMPILER_ID} " STREQUAL "Clang " AND NOT MSVC)
# -s doesn't work with clang or Visual Studio, see alternative in link below:
# http://stackoverflow.com/questions/6085491/gcc-vs-clang-symbol-strippingu
set (CMAKE_C_FLAGS_RELEASE "-s")
endif()
if (NOT MSVC)
set (CMAKE_C_FLAGS_RELEASE " ${CMAKE_C_FLAGS_RELEASE} -O3 -DNDEBUG ${CMAKE_C_FLAGS_ALL}" CACHE INTERNAL "C Flags for release" FORCE)
set (CMAKE_CXX_FLAGS_RELEASE ${CMAKE_C_FLAGS_RELEASE})
set (CMAKE_C_FLAGS_RELWITHDEBINFO " -g -O2 ${CMAKE_C_FLAGS_ALL}" CACHE INTERNAL "C Flags for release with debug support" FORCE)
set (CMAKE_CXX_FLAGS_RELWITHDEBINFO ${CMAKE_C_FLAGS_RELWITHDEBINFO})
set (CMAKE_C_FLAGS_DEBUG " -ggdb3 ${CMAKE_C_FLAGS_ALL}" CACHE INTERNAL "C Flags for debug" FORCE)
set (CMAKE_CXX_FLAGS_DEBUG ${CMAKE_C_FLAGS_DEBUG})
set (CMAKE_C_FLAGS_PROFILE " -fno-omit-frame-pointer -g -pg ${CMAKE_C_FLAGS_ALL}" CACHE INTERNAL "C Flags for profile" FORCE)
set (CMAKE_CXX_FLAGS_PROFILE ${CMAKE_C_FLAGS_PROFILE})
set (CMAKE_C_FLAGS_COVERAGE " -g -O0 -Wformat=2 --coverage -fno-inline ${CMAKE_C_FLAGS_ALL}" CACHE INTERNAL "C Flags for static code coverage" FORCE)
set (CMAKE_CXX_FLAGS_COVERAGE "${CMAKE_C_FLAGS_COVERAGE}")
foreach(flag
-fno-default-inline
-fno-elide-constructors
-fno-implicit-inline-templates)
CHECK_CXX_COMPILER_FLAG(${flag} R${flag})
if (R${flag})
set (CMAKE_CXX_FLAGS_COVERAGE "${CMAKE_CXX_FLAGS_COVERAGE} ${flag}")
endif()
endforeach()
endif()
#####################################
# Set all the global build flags
set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${CMAKE_C_FLAGS_${CMAKE_BUILD_TYPE_UPPERCASE}}")
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE_UPPERCASE}}")
set (CMAKE_CXX_EXTENSIONS off)
set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${CMAKE_LINK_FLAGS_${CMAKE_BUILD_TYPE_UPPERCASE}}")
set (CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${CMAKE_LINK_FLAGS_${CMAKE_BUILD_TYPE_UPPERCASE}}")
set (CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} ${CMAKE_LINK_FLAGS_${CMAKE_BUILD_TYPE_UPPERCASE}}")
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
if (UNIX)
# Add visibility in UNIX
check_gcc_visibility()
if (GCC_SUPPORTS_VISIBILITY)
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility=hidden")
endif()
endif()
# Compiler-specific C++17 activation.
if ("${CMAKE_CXX_COMPILER_ID} " MATCHES "GNU ")
execute_process(
COMMAND ${CMAKE_CXX_COMPILER} -dumpversion OUTPUT_VARIABLE GCC_VERSION)
if (NOT (GCC_VERSION VERSION_GREATER_EQUAL 7.0))
message(STATUS "Found version ${GCC_VERSION}")
message(FATAL_ERROR "${PROJECT_NAME} requires g++ 7.0 or greater.")
endif ()
elseif ("${CMAKE_CXX_COMPILER_ID} " MATCHES "Clang ")
if(APPLE)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")
endif()
elseif ("${CMAKE_CXX_COMPILER_ID} " STREQUAL "MSVC ")
if (MSVC_VERSION LESS 1914)
message(FATAL_ERROR "${PROJECT_NAME} requires VS 2017 or greater.")
endif()
else ()
message(FATAL_ERROR "Your C++ compiler does not support C++17.")
endif ()
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