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include(CheckCCompilerFlag)
macro (checkCFlag FLAG)
CHECK_C_COMPILER_FLAG("${FLAG}" CFLAG${FLAG})
if(CFLAG${FLAG})
string(APPEND CMAKE_C_FLAGS " ${FLAG}")
else()
message(WARNING "compiler does not support ${FLAG}")
endif()
endmacro()
option(ENABLE_WARNING_VERBOSE "enable -Weveryting (and some exceptions) for compile" ON)
option(ENABLE_WARNING_ERROR "enable -Werror for compile" OFF)
if (ENABLE_WARNING_VERBOSE)
if (MSVC)
# Remove previous warning definitions,
# NMake is otherwise complaining.
foreach (flags_var_to_scrub
CMAKE_C_FLAGS
CMAKE_C_FLAGS_DEBUG
CMAKE_C_FLAGS_RELEASE
CMAKE_C_FLAGS_RELWITHDEBINFO
CMAKE_C_FLAGS_MINSIZEREL)
string (REGEX REPLACE "(^| )[/-]W[ ]*[1-9]" " "
"${flags_var_to_scrub}" "${${flags_var_to_scrub}}")
endforeach()
set(C_WARNING_FLAGS
/W4
/wo4324
)
else()
set(C_WARNING_FLAGS
-Weverything
-Wall
-Wpedantic
-Wno-padded
-Wno-cast-align
-Wno-declaration-after-statement
-Wno-unsafe-buffer-usage
-Wno-reserved-identifier
-Wno-covered-switch-default
)
endif()
foreach(FLAG ${C_WARNING_FLAGS})
CheckCFlag(${FLAG})
endforeach()
endif()
if (ENABLE_WARNING_ERROR)
CheckCFlag(-Werror)
endif()
set(CMAKE_C_FLAGS ${CMAKE_C_FLAGS} CACHE STRING "default CFLAGS")
message("Using CFLAGS ${CMAKE_C_FLAGS}")
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