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CMake: automatic detection of compiler flag compatibility

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This commit is contained in:
Max Bruckner 2017-02-07 14:51:29 +01:00
parent 6cdb6894d4
commit d00ca18ac2
1 changed files with 33 additions and 3 deletions
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36
CMakeLists.txt
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@ -12,13 +12,43 @@ set(CJSON_VERSION_SO 1)
set(CJSON_UTILS_VERSION_SO 1)
set(PROJECT_VERSION "${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}.${PROJECT_VERSION_PATCH}")
set(custom_compiler_flags)
include(CheckCCompilerFlag)
option(ENABLE_CUSTOM_COMPILER_FLAGS "Enables custom compiler flags for Clang and GCC" ON)
if (ENABLE_CUSTOM_COMPILER_FLAGS)
if(("${CMAKE_C_COMPILER_ID}" MATCHES "GNU") OR ("${CMAKE_C_COMPILER_ID}" MATCHES "Clang"))
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=c89 -pedantic -Wall -Wextra -Werror -Wstrict-prototypes -Wwrite-strings -Wshadow -Winit-self -Wcast-align -Wformat=2 -Wmissing-prototypes -Wstrict-overflow=2 -Wcast-qual -Wc++-compat -Wundef -Wswitch-default -Wconversion -fstack-protector-strong")
endif()
list(APPEND custom_compiler_flags
-std=c89
-pedantic
-Wall
-Wextra
-Werror
-Wstrict-prototypes
-Wwrite-strings
-Wshadow
-Winit-self
-Wcast-align
-Wformat=2
-Wmissing-prototypes
-Wstrict-overflow=2
-Wcast-qual
-Wc++-compat
-Wundef
-Wswitch-default
-Wconversion
-fstack-protector-strong
)
endif()
# apply custom compiler flags
foreach(compiler_flag ${custom_compiler_flags})
CHECK_C_COMPILER_FLAG(${compiler_flag} "FLAG_SUPPORTED-${compiler_flag}")
if (FLAG_SUPPORTED${compiler_flag})
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${compiler_flag}")
endif()
endforeach()
#variables for pkg-config
set(prefix "${CMAKE_INSTALL_PREFIX}")
set(libdir "${CMAKE_INSTALL_LIBDIR}")