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Introduce AddCFlagIfSupported CMake macro

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This commit is contained in:
Jacques Germishuys 2014-04-19 23:07:50 +02:00
parent 364ef52881
commit 5c8d5eac35
2 changed files with 25 additions and 38 deletions
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47
CMakeLists.txt
View File

@ -18,7 +18,7 @@ CMAKE_MINIMUM_REQUIRED(VERSION 2.6)
SET(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_LIST_DIR}/cmake/Modules/")
INCLUDE(CheckLibraryExists)
INCLUDE(CheckCCompilerFlag)
INCLUDE(AddCFlagIfSupported)
# Build options
#
@ -302,49 +302,20 @@ ELSE ()
ADD_DEFINITIONS(-D__USE_MINGW_ANSI_STDIO=1)
ELSEIF (BUILD_SHARED_LIBS)
CHECK_C_COMPILER_FLAG(-fvisibility=hidden HIDDEN_VISIBILITY_FLAG)
IF(HIDDEN_VISIBILITY_FLAG)
SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fvisibility=hidden")
ENDIF()
ADD_C_FLAG_IF_SUPPORTED(-fvisibility=hidden)
SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")
ENDIF ()
CHECK_C_COMPILER_FLAG(-Wno-missing-field-initializers NO_MISSING_FIELD_INIT_WARNING)
IF(NO_MISSING_FIELD_INIT_WARNING)
SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-missing-field-initializers")
ENDIF()
CHECK_C_COMPILER_FLAG(-Wstrict-aliasing STRICT_ALIASING_WARNING)
IF(STRICT_ALIASING_WARNING)
SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wstrict-aliasing=2")
ENDIF()
CHECK_C_COMPILER_FLAG(-Wstrict-prototypes STRICT_PROTOTYPES_WARNING)
IF(STRICT_PROTOTYPES_WARNING)
SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wstrict-prototypes")
ENDIF()
CHECK_C_COMPILER_FLAG(-Wdeclaration-after-statement DECLARATION_AFTER_STATEMENT_WARNING)
IF(DECLARATION_AFTER_STATEMENT_WARNING)
SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wdeclaration-after-statement")
ENDIF()
CHECK_C_COMPILER_FLAG(-Wno-unused-const-variable UNUSED_CONST_VAR_WARNING)
IF(UNUSED_CONST_VAR_WARNING)
SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-unused-const-variable")
ENDIF()
CHECK_C_COMPILER_FLAG(-Wno-unused-function UNUSED_FUNCTION_WARNING)
IF(UNUSED_FUNCTION_WARNING)
SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-unused-function")
ENDIF()
ADD_C_FLAG_IF_SUPPORTED(-Wno-missing-field-initializers)
ADD_C_FLAG_IF_SUPPORTED(-Wstrict-aliasing=2)
ADD_C_FLAG_IF_SUPPORTED(-Wstrict-prototypes)
ADD_C_FLAG_IF_SUPPORTED(-Wdeclaration-after-statement)
ADD_C_FLAG_IF_SUPPORTED(-Wno-unused-const-variable)
ADD_C_FLAG_IF_SUPPORTED(-Wno-unused-function)
IF (APPLE) # Apple deprecated OpenSSL
CHECK_C_COMPILER_FLAG(-Wno-deprecated-declarations DEPRECATED_DECLARATIONS_WARNING)
IF(DEPRECATED_DECLARATIONS_WARNING)
SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-deprecated-declarations")
ENDIF()
ADD_C_FLAG_IF_SUPPORTED(-Wno-deprecated-declarations)
ENDIF()
IF (PROFILE)

16
cmake/Modules/AddCFlagIfSupported.cmake Normal file
View File

@ -0,0 +1,16 @@
# - Append compiler flag to CMAKE_C_FLAGS if compiler supports it
# ADD_C_FLAG_IF_SUPPORTED(<flag>)
# <flag> - the compiler flag to test
# This internally calls the CHECK_C_COMPILER_FLAG macro.
INCLUDE(CheckCCompilerFlag)
MACRO(ADD_C_FLAG_IF_SUPPORTED _FLAG)
STRING(TOUPPER ${_FLAG} UPCASE)
STRING(REGEX REPLACE "^-" "" UPCASE_PRETTY ${UPCASE})
CHECK_C_COMPILER_FLAG(${_FLAG} IS_${UPCASE_PRETTY}_SUPPORTED)
IF(IS_${UPCASE_PRETTY}_SUPPORTED)
SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${_FLAG}")
ENDIF()
ENDMACRO()