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include(AddCXXCompilerFlag)
include(CheckCXXCompilerFlagSSP)
if (UNIX OR WIN32)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)
add_cxx_compiler_flag("-Wall" SUPPORTED_CXX_COMPILER_FLAGS)
add_cxx_compiler_flag("-Wextra" SUPPORTED_CXX_COMPILER_FLAGS)
add_cxx_compiler_flag("-Wshadow" SUPPORTED_CXX_COMPILER_FLAGS)
add_cxx_compiler_flag("-Wwrite-strings" SUPPORTED_CXX_COMPILER_FLAGS)
add_cxx_compiler_flag("-Werror=write-strings" SUPPORTED_CXX_COMPILER_FLAGS)
add_cxx_compiler_flag("-Wpointer-arith" SUPPORTED_CXX_COMPILER_FLAGS)
add_cxx_compiler_flag("-Werror=pointer-arith" SUPPORTED_CXX_COMPILER_FLAGS)
add_cxx_compiler_flag("-Wreturn-type" SUPPORTED_CXX_COMPILER_FLAGS)
add_cxx_compiler_flag("-Werror=return-type" SUPPORTED_CXX_COMPILER_FLAGS)
add_cxx_compiler_flag("-Wuninitialized" SUPPORTED_CXX_COMPILER_FLAGS)
add_cxx_compiler_flag("-Werror=uninitialized" SUPPORTED_CXX_COMPILER_FLAGS)
add_cxx_compiler_flag("-Wimplicit-fallthrough" SUPPORTED_CXX_COMPILER_FLAGS)
add_cxx_compiler_flag("-Wno-format-zero-length" SUPPORTED_CXX_COMPILER_FLAGS)
add_cxx_compiler_flag("-Wmissing-field-initializers" SUPPORTED_CXX_COMPILER_FLAGS)
add_cxx_compiler_flag("-Wunused-label" SUPPORTED_CXX_COMPILER_FLAGS)
add_cxx_compiler_flag("-Werror=unused-label" SUPPORTED_CXX_COMPILER_FLAGS)
add_cxx_compiler_flag("-ftree-vectorize" SUPPORTED_CXX_COMPILER_FLAGS)
if(OPTION_OMP)
add_cxx_compiler_flag("-Werror=unknown-pragmas" SUPPORTED_CXX_COMPILER_FLAGS)
endif()
endif()
if (UNIX)
##################### CXX ########################
#
# Check for -Werror turned on if possible
#
# This will prevent that compiler flags are detected incorrectly.
#
check_cxx_compiler_flag("-Werror" REQUIRED_FLAGS_WERROR)
if (REQUIRED_FLAGS_WERROR)
set(CMAKE_REQUIRED_FLAGS "-Werror")
if (PICKY_DEVELOPER)
list(APPEND SUPPORTED_CXX_COMPILER_FLAGS "-Werror")
endif()
endif()
check_cxx_compiler_flag("-Wformat" REQUIRED_FLAGS_WFORMAT)
if (REQUIRED_FLAGS_WFORMAT)
list(APPEND SUPPORTED_CXX_COMPILER_FLAGS "-Wformat")
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -Wformat")
endif()
add_cxx_compiler_flag("-Wformat-security" SUPPORTED_CXX_COMPILER_FLAGS)
add_cxx_compiler_flag("-Werror=format-security" SUPPORTED_CXX_COMPILER_FLAGS)
check_cxx_compiler_flag_ssp("-fstack-protector-strong" WITH_STACK_PROTECTOR_STRONG)
if (WITH_STACK_PROTECTOR_STRONG)
list(APPEND SUPPORTED_CXX_COMPILER_FLAGS "-fstack-protector-strong")
else (WITH_STACK_PROTECTOR_STRONG)
check_cxx_compiler_flag_ssp("-fstack-protector" WITH_STACK_PROTECTOR)
if (WITH_STACK_PROTECTOR)
list(APPEND SUPPORTED_CXX_COMPILER_FLAGS "-fstack-protector")
# This is needed as Solaris has a separate libssp
if (SOLARIS)
list(APPEND SUPPORTED_LINKER_FLAGS "-fstack-protector")
endif()
endif()
endif (WITH_STACK_PROTECTOR_STRONG)
check_cxx_compiler_flag_ssp("-fstack-clash-protection" WITH_STACK_CLASH_PROTECTION)
if (WITH_STACK_CLASH_PROTECTION)
list(APPEND SUPPORTED_CXX_COMPILER_FLAGS "-fstack-clash-protection")
endif()
if (PICKY_DEVELOPER)
add_cxx_compiler_flag("-Wno-error=deprecated-declarations" SUPPORTED_CXX_COMPILER_FLAGS)
add_cxx_compiler_flag("-Wno-error=tautological-compare" SUPPORTED_CXX_COMPILER_FLAGS)
endif()
# Unset CMAKE_REQUIRED_FLAGS
unset(CMAKE_REQUIRED_FLAGS)
endif()
set(DEFAULT_CXX_COMPILE_FLAGS ${SUPPORTED_CXX_COMPILER_FLAGS} CACHE INTERNAL "Default CXX Compiler Flags" FORCE)
set(DEFAULT_LINK_FLAGS ${SUPPORTED_LINKER_FLAGS} CACHE INTERNAL "Default Linker Flags" FORCE)
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