# define system dependent compiler flags include(CheckCCompilerFlag) include(CheckCCompilerFlagSSP) if (UNIX AND NOT WIN32) # # Define GNUCC compiler flags # if (${CMAKE_C_COMPILER_ID} MATCHES "(GNU|Clang)") # add -Wconversion ? set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu99 -pedantic -pedantic-errors") set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Wshadow -Wmissing-prototypes -Wdeclaration-after-statement") set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wunused -Wfloat-equal -Wpointer-arith -Wwrite-strings -Wformat-security") set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wmissing-format-attribute") # with -fPIC check_c_compiler_flag("-fPIC" WITH_FPIC) if (WITH_FPIC) set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC") endif (WITH_FPIC) check_c_compiler_flag_ssp("-fstack-protector" WITH_STACK_PROTECTOR) if (WITH_STACK_PROTECTOR) set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fstack-protector") endif (WITH_STACK_PROTECTOR) check_c_compiler_flag("-D_FORTIFY_SOURCE=2" WITH_FORTIFY_SOURCE) if (WITH_FORTIFY_SOURCE) set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_FORTIFY_SOURCE=2") endif (WITH_FORTIFY_SOURCE) endif (${CMAKE_C_COMPILER_ID} MATCHES "(GNU|Clang)") # # Check for large filesystem support # if (CMAKE_SIZEOF_VOID_P MATCHES "8") # with large file support execute_process( COMMAND getconf LFS64_CFLAGS OUTPUT_VARIABLE _lfs_CFLAGS ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE ) else (CMAKE_SIZEOF_VOID_P MATCHES "8") # with large file support execute_process( COMMAND getconf LFS_CFLAGS OUTPUT_VARIABLE _lfs_CFLAGS ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE ) endif (CMAKE_SIZEOF_VOID_P MATCHES "8") if (_lfs_CFLAGS) string(REGEX REPLACE "[\r\n]" " " "${_lfs_CFLAGS}" "${${_lfs_CFLAGS}}") set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${_lfs_CFLAGS}") endif (_lfs_CFLAGS) endif (UNIX AND NOT WIN32) if (MSVC) # Use secure functions by defaualt and suppress warnings about #"deprecated" functions set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /D _CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES=1") set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /D _CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES_COUNT=1") set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /D _CRT_NONSTDC_NO_WARNINGS=1 /D _CRT_SECURE_NO_WARNINGS=1") endif (MSVC)