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libssh-0.11.0
CompilerChecks.cmake
130 строк
6 KB
Andreas Schneider
cmake: Add compiler warnings for Modern C (C99)
09 фев 2023, 12:42
09 фев 2023, 12:42
7291f21
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include(AddCCompilerFlag) include(CheckCCompilerFlagSSP) if (UNIX) # # Check for -Werror turned on if possible # # This will prevent that compiler flags are detected incorrectly. # check_c_compiler_flag("-Werror" REQUIRED_FLAGS_WERROR) if (REQUIRED_FLAGS_WERROR) set(CMAKE_REQUIRED_FLAGS "-Werror") if (PICKY_DEVELOPER) list(APPEND SUPPORTED_COMPILER_FLAGS "-Werror") endif() endif() add_c_compiler_flag("-std=gnu99" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Wpedantic" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Wall" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Wshadow" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Wmissing-prototypes" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Wcast-align" SUPPORTED_COMPILER_FLAGS) #add_c_compiler_flag("-Wcast-qual" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Werror=address" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Wstrict-prototypes" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Werror=strict-prototypes" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Wwrite-strings" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Werror=write-strings" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Werror-implicit-function-declaration" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Wpointer-arith" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Werror=pointer-arith" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Wdeclaration-after-statement" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Werror=declaration-after-statement" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Wreturn-type" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Werror=return-type" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Wuninitialized" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Werror=uninitialized" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Wimplicit-fallthrough" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Werror=strict-overflow" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Wstrict-overflow=2" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Wno-format-zero-length" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Wmissing-field-initializers" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Wsign-compare" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Wold-style-definition" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Werror=old-style-definition" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Wimplicit-int" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Werror=implicit-int" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Wint-conversion" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Werror=int-conversion" SUPPORTED_COMPILER_FLAGS) check_c_compiler_flag("-Wformat" REQUIRED_FLAGS_WFORMAT) if (REQUIRED_FLAGS_WFORMAT) list(APPEND SUPPORTED_COMPILER_FLAGS "-Wformat") set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -Wformat") endif() add_c_compiler_flag("-Wformat-security" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Werror=format-security" SUPPORTED_COMPILER_FLAGS) # Allow zero for a variadic macro argument string(TOLOWER "${CMAKE_C_COMPILER_ID}" _C_COMPILER_ID) if ("${_C_COMPILER_ID}" STREQUAL "clang") add_c_compiler_flag("-Wno-gnu-zero-variadic-macro-arguments" SUPPORTED_COMPILER_FLAGS) endif() add_c_compiler_flag("-fno-common" SUPPORTED_COMPILER_FLAGS) if (CMAKE_BUILD_TYPE) string(TOLOWER "${CMAKE_BUILD_TYPE}" CMAKE_BUILD_TYPE_LOWER) if (CMAKE_BUILD_TYPE_LOWER MATCHES (release|relwithdebinfo|minsizerel)) add_c_compiler_flag("-Wp,-D_FORTIFY_SOURCE=2" SUPPORTED_COMPILER_FLAGS) endif() endif() check_c_compiler_flag_ssp("-fstack-protector-strong" WITH_STACK_PROTECTOR_STRONG) if (WITH_STACK_PROTECTOR_STRONG) list(APPEND SUPPORTED_COMPILER_FLAGS "-fstack-protector-strong") # This is needed as Solaris has a separate libssp if (SOLARIS) list(APPEND SUPPORTED_LINKER_FLAGS "-fstack-protector-strong") endif() else (WITH_STACK_PROTECTOR_STRONG) check_c_compiler_flag_ssp("-fstack-protector" WITH_STACK_PROTECTOR) if (WITH_STACK_PROTECTOR) list(APPEND SUPPORTED_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) if (NOT WINDOWS AND NOT CYGWIN) check_c_compiler_flag_ssp("-fstack-clash-protection" WITH_STACK_CLASH_PROTECTION) if (WITH_STACK_CLASH_PROTECTION) list(APPEND SUPPORTED_COMPILER_FLAGS "-fstack-clash-protection") endif() endif() if (PICKY_DEVELOPER) add_c_compiler_flag("-Wno-error=deprecated-declarations" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("-Wno-error=tautological-compare" SUPPORTED_COMPILER_FLAGS) endif() add_c_compiler_flag("-Wno-deprecated-declarations" DEPRECATION_COMPILER_FLAGS) # Unset CMAKE_REQUIRED_FLAGS unset(CMAKE_REQUIRED_FLAGS) endif() if (MSVC) add_c_compiler_flag("/D _CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES=1" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("/D _CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES_COUNT=1" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("/D _CRT_NONSTDC_NO_WARNINGS=1" SUPPORTED_COMPILER_FLAGS) add_c_compiler_flag("/D _CRT_SECURE_NO_WARNINGS=1" SUPPORTED_COMPILER_FLAGS) endif() # This removes this annoying warning # "warning: 'BN_CTX_free' is deprecated: first deprecated in OS X 10.7 [-Wdeprecated-declarations]" if (OSX) add_c_compiler_flag("-Wno-deprecated-declarations" SUPPORTED_COMPILER_FLAGS) endif() set(DEFAULT_C_COMPILE_FLAGS ${SUPPORTED_COMPILER_FLAGS} CACHE INTERNAL "Default C Compiler Flags" FORCE) set(DEFAULT_LINK_FLAGS ${SUPPORTED_LINKER_FLAGS} CACHE INTERNAL "Default C Linker Flags" FORCE) if (DEPRECATION_COMPILER_FLAGS) set(DEFAULT_C_NO_DEPRECATION_FLAGS ${DEPRECATION_COMPILER_FLAGS} CACHE INTERNAL "Default no deprecation flags" FORCE) endif()