| # Prepends flags to CMAKE_C_FLAGS if supported by the C compiler. Almost all |
| # flags should be prepended to allow the user to override them. |
| macro(WEBKIT_PREPEND_GLOBAL_C_FLAGS) |
| foreach (_flag ${ARGN}) |
| check_c_compiler_flag("${_flag}" C_COMPILER_SUPPORTS_${_flag}) |
| if (C_COMPILER_SUPPORTS_${_flag}) |
| set(CMAKE_C_FLAGS "${_flag} ${CMAKE_C_FLAGS}") |
| endif () |
| endforeach () |
| endmacro() |
| |
| # Appends flags to CMAKE_C_FLAGS if supported by the C compiler. This macro |
| # should be used sparingly. Only append flags if the user must not be allowed to |
| # override them. |
| macro(WEBKIT_APPEND_GLOBAL_C_FLAGS) |
| foreach (_flag ${ARGN}) |
| check_c_compiler_flag("${_flag}" C_COMPILER_SUPPORTS_${_flag}) |
| if (C_COMPILER_SUPPORTS_${_flag}) |
| set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${_flag}") |
| endif () |
| endforeach () |
| endmacro() |
| |
| # Prepends flags to CMAKE_CXX_FLAGS if supported by the C++ compiler. Almost all |
| # flags should be prepended to allow the user to override them. |
| macro(WEBKIT_PREPEND_GLOBAL_CXX_FLAGS) |
| foreach (_flag ${ARGN}) |
| check_cxx_compiler_flag("${_flag}" CXX_COMPILER_SUPPORTS_${_flag}) |
| if (CXX_COMPILER_SUPPORTS_${_flag}) |
| set(CMAKE_CXX_FLAGS "${_flag} ${CMAKE_CXX_FLAGS}") |
| endif () |
| endforeach () |
| endmacro() |
| |
| # Appends flags to CMAKE_CXX_FLAGS if supported by the C++ compiler. This macro |
| # should be used sparingly. Only append flags if the user must not be allowed to |
| # override them. |
| macro(WEBKIT_APPEND_GLOBAL_CXX_FLAGS) |
| foreach (_flag ${ARGN}) |
| check_cxx_compiler_flag("${_flag}" CXX_COMPILER_SUPPORTS_${_flag}) |
| if (CXX_COMPILER_SUPPORTS_${_flag}) |
| set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${_flag}") |
| endif () |
| endforeach () |
| endmacro() |
| |
| # Prepends flags to CMAKE_C_FLAGS and CMAKE_CXX_FLAGS if supported by the C |
| # or C++ compiler, respectively. Almost all flags should be prepended to allow |
| # the user to override them. |
| macro(WEBKIT_PREPEND_GLOBAL_COMPILER_FLAGS) |
| WEBKIT_PREPEND_GLOBAL_C_FLAGS(${ARGN}) |
| WEBKIT_PREPEND_GLOBAL_CXX_FLAGS(${ARGN}) |
| endmacro() |
| |
| # Appends flags to CMAKE_C_FLAGS and CMAKE_CXX_FLAGS if supported by the C or |
| # C++ compiler, respectively. This macro should be used sparingly. Only append |
| # flags if the user must not be allowed to override them. |
| macro(WEBKIT_APPEND_GLOBAL_COMPILER_FLAGS) |
| WEBKIT_APPEND_GLOBAL_C_FLAGS(${ARGN}) |
| WEBKIT_APPEND_GLOBAL_CXX_FLAGS(${ARGN}) |
| endmacro() |
| |
| # Appends flags to COMPILE_FLAGS of _target if supported by the C compiler. |
| # Note that it is simply not possible to pass different C and C++ flags, unless |
| # we drop support for the Visual Studio backend and use the COMPILE_LANGUAGE |
| # generator expression. This is a very serious limitation. |
| macro(WEBKIT_ADD_TARGET_C_FLAGS _target) |
| foreach (_flag ${ARGN}) |
| check_c_compiler_flag("${_flag}" C_COMPILER_SUPPORTS_${_flag}) |
| if (C_COMPILER_SUPPORTS_${_flag}) |
| target_compile_options(${_target} PRIVATE ${_flag}) |
| endif () |
| endforeach () |
| endmacro() |
| |
| # Appends flags to COMPILE_FLAGS of _target if supported by the C++ compiler. |
| # Note that it is simply not possible to pass different C and C++ flags, unless |
| # we drop support for the Visual Studio backend and use the COMPILE_LANGUAGE |
| # generator expression. This is a very serious limitation. |
| macro(WEBKIT_ADD_TARGET_CXX_FLAGS _target) |
| foreach (_flag ${ARGN}) |
| check_cxx_compiler_flag("${_flag}" CXX_COMPILER_SUPPORTS_${_flag}) |
| if (CXX_COMPILER_SUPPORTS_${_flag}) |
| target_compile_options(${_target} PRIVATE ${_flag}) |
| endif () |
| endforeach () |
| endmacro() |
| |
| |
| if (COMPILER_IS_GCC_OR_CLANG) |
| WEBKIT_APPEND_GLOBAL_COMPILER_FLAGS(-fno-strict-aliasing) |
| |
| # clang-cl.exe impersonates cl.exe so some clang arguments like -fno-rtti are |
| # represented using cl.exe's options and should not be passed as flags, so |
| # we do not add -fno-rtti or -fno-exceptions for clang-cl |
| if (COMPILER_IS_CLANG_CL) |
| # FIXME: These warnings should be addressed |
| WEBKIT_PREPEND_GLOBAL_COMPILER_FLAGS(-Wno-undef |
| -Wno-macro-redefined |
| -Wno-unknown-pragmas |
| -Wno-nonportable-include-path |
| -Wno-unknown-argument) |
| else () |
| WEBKIT_APPEND_GLOBAL_COMPILER_FLAGS(-fno-exceptions) |
| WEBKIT_APPEND_GLOBAL_CXX_FLAGS(-std=c++14 |
| -fno-rtti) |
| |
| if (WIN32) |
| WEBKIT_APPEND_GLOBAL_COMPILER_FLAGS(-mno-ms-bitfields) |
| WEBKIT_PREPEND_GLOBAL_COMPILER_FLAGS(-Wno-unknown-pragmas) |
| add_definitions(-D__USE_MINGW_ANSI_STDIO=1) |
| endif () |
| endif () |
| |
| # Warnings to be enabled |
| WEBKIT_PREPEND_GLOBAL_COMPILER_FLAGS(-Wall |
| -Wextra |
| -Wcast-align |
| -Wformat-security |
| -Wmissing-format-attribute |
| -Wpointer-arith |
| -Wundef |
| -Wwrite-strings) |
| |
| # Warnings to be disabled |
| # FIXME: We should probably not be disabling -Wno-maybe-uninitialized? |
| WEBKIT_PREPEND_GLOBAL_COMPILER_FLAGS(-Qunused-arguments |
| -Wno-maybe-uninitialized |
| -Wno-noexcept-type |
| -Wno-parentheses-equality) |
| |
| # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80947 |
| if (${CMAKE_CXX_COMPILER_VERSION} VERSION_LESS "8.0" AND NOT CMAKE_CXX_COMPILER_ID MATCHES "Clang") |
| WEBKIT_PREPEND_GLOBAL_CXX_FLAGS(-Wno-attributes) |
| endif () |
| endif () |
| |
| # -Wexpansion-to-defined produces false positives with GCC but not Clang |
| # https://bugs.webkit.org/show_bug.cgi?id=167643#c13 |
| if (CMAKE_COMPILER_IS_GNUCXX) |
| WEBKIT_PREPEND_GLOBAL_COMPILER_FLAGS(-Wno-expansion-to-defined) |
| endif () |
| |
| # Ninja tricks compilers into turning off color support. |
| if (CMAKE_GENERATOR STREQUAL "Ninja") |
| WEBKIT_PREPEND_GLOBAL_COMPILER_FLAGS(-fcolor-diagnostics |
| -fdiagnostics-color=always) |
| endif () |
| |
| |
| string(TOLOWER ${CMAKE_HOST_SYSTEM_PROCESSOR} LOWERCASE_CMAKE_HOST_SYSTEM_PROCESSOR) |
| if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" AND NOT "${LOWERCASE_CMAKE_HOST_SYSTEM_PROCESSOR}" MATCHES "x86_64") |
| # To avoid out of memory when building with debug option in 32bit system. |
| # See https://bugs.webkit.org/show_bug.cgi?id=77327 |
| set(CMAKE_SHARED_LINKER_FLAGS_DEBUG "-Wl,--no-keep-memory ${CMAKE_SHARED_LINKER_FLAGS_DEBUG}") |
| endif () |
| |
| if (COMPILER_IS_GCC_OR_CLANG) |
| # Careful: this needs to be above where ENABLED_COMPILER_SANITIZERS is set. |
| # Also, it's not possible to use the normal prepend/append macros for |
| # -fsanitize=address, because check_cxx_compiler_flag will report it's |
| # unsupported, because it causes the build to fail if not used when linking. |
| option(ENABLE_ADDRESS_SANITIZER "Enable address sanitizer" OFF) |
| if (ENABLE_ADDRESS_SANITIZER) |
| WEBKIT_PREPEND_GLOBAL_COMPILER_FLAGS(-fno-omit-frame-pointer |
| -fno-optimize-sibling-calls) |
| set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=address") |
| set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address") |
| set(CMAKE_EXE_LINKER_FLAGS "-lpthread ${CMAKE_EXE_LINKER_FLAGS} -fsanitize=address") |
| set(CMAKE_SHARED_LINKER_FLAGS "-lpthread ${CMAKE_SHARED_LINKER_FLAGS} -fsanitize=address") |
| endif () |
| endif () |
| |
| if (NOT MSVC) |
| string(REGEX MATCHALL "-fsanitize=[^ ]*" ENABLED_COMPILER_SANITIZERS ${CMAKE_CXX_FLAGS}) |
| endif () |
| |
| if (UNIX AND NOT APPLE AND NOT ENABLED_COMPILER_SANITIZERS) |
| set(CMAKE_SHARED_LINKER_FLAGS "-Wl,--no-undefined ${CMAKE_SHARED_LINKER_FLAGS}") |
| endif () |
| |
| |
| # CODE_GENERATOR_PREPROCESSOR_WITH_LINEMARKERS only matters with GCC >= 4.7.0. Since this |
| # version, -P does not output empty lines, which currently breaks make_names.pl in |
| # WebCore. Investigating whether make_names.pl should be changed instead is left as an exercise to |
| # the reader. |
| if (MSVC) |
| set(CODE_GENERATOR_PREPROCESSOR_ARGUMENTS "/nologo /EP /TP") |
| set(CODE_GENERATOR_PREPROCESSOR_WITH_LINEMARKERS_ARGUMENTS ${CODE_GENERATOR_PREPROCESSOR_ARGUMENTS}) |
| else () |
| set(CODE_GENERATOR_PREPROCESSOR_ARGUMENTS "-E -P -x c++") |
| set(CODE_GENERATOR_PREPROCESSOR_WITH_LINEMARKERS_ARGUMENTS "-E -x c++") |
| endif () |
| |
| set(CODE_GENERATOR_PREPROCESSOR "\"${CMAKE_CXX_COMPILER}\" ${CODE_GENERATOR_PREPROCESSOR_ARGUMENTS}") |
| set(CODE_GENERATOR_PREPROCESSOR_WITH_LINEMARKERS "\"${CMAKE_CXX_COMPILER}\" ${CODE_GENERATOR_PREPROCESSOR_WITH_LINEMARKERS_ARGUMENTS}") |
| |
| |
| # Ensure that the default include system directories are added to the list of CMake implicit includes. |
| # This workarounds an issue that happens when using GCC 6 and using system includes (-isystem). |
| # For more details check: https://bugs.webkit.org/show_bug.cgi?id=161697 |
| macro(DETERMINE_GCC_SYSTEM_INCLUDE_DIRS _lang _compiler _flags _result) |
| file(WRITE "${CMAKE_BINARY_DIR}/CMakeFiles/dummy" "\n") |
| separate_arguments(_buildFlags UNIX_COMMAND "${_flags}") |
| execute_process(COMMAND ${_compiler} ${_buildFlags} -v -E -x ${_lang} -dD dummy |
| WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/CMakeFiles OUTPUT_QUIET |
| ERROR_VARIABLE _gccOutput) |
| file(REMOVE "${CMAKE_BINARY_DIR}/CMakeFiles/dummy") |
| if ("${_gccOutput}" MATCHES "> search starts here[^\n]+\n *(.+) *\n *End of (search) list") |
| set(${_result} ${CMAKE_MATCH_1}) |
| string(REPLACE "\n" " " ${_result} "${${_result}}") |
| separate_arguments(${_result}) |
| endif () |
| endmacro() |
| |
| if (COMPILER_IS_GCC_OR_CLANG) |
| DETERMINE_GCC_SYSTEM_INCLUDE_DIRS("c" "${CMAKE_C_COMPILER}" "${CMAKE_C_FLAGS}" SYSTEM_INCLUDE_DIRS) |
| set(CMAKE_C_IMPLICIT_INCLUDE_DIRECTORIES ${CMAKE_C_IMPLICIT_INCLUDE_DIRECTORIES} ${SYSTEM_INCLUDE_DIRS}) |
| DETERMINE_GCC_SYSTEM_INCLUDE_DIRS("c++" "${CMAKE_CXX_COMPILER}" "${CMAKE_CXX_FLAGS}" SYSTEM_INCLUDE_DIRS) |
| set(CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES ${CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES} ${SYSTEM_INCLUDE_DIRS}) |
| endif () |
