| # 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 ${_flag}) |
| endif () |
| endforeach () |
| endmacro() |
| |
| |
| if (COMPILER_IS_GCC_OR_CLANG) |
| WEBKIT_APPEND_GLOBAL_COMPILER_FLAGS(-fno-strict-aliasing) |
| |
| # clang-cl.exe impersonates cl.exe so some clang arguments like -fno-rtti are |
| # represented using cl.exe's options and should not be passed as flags, so |
| # we do not add -fno-rtti or -fno-exceptions for clang-cl |
| if (COMPILER_IS_CLANG_CL) |
| # FIXME: These warnings should be addressed |
| WEBKIT_PREPEND_GLOBAL_COMPILER_FLAGS(-Wno-undef |
| -Wno-macro-redefined |
| -Wno-unknown-pragmas |
| -Wno-nonportable-include-path |
| -Wno-unknown-argument) |
| else () |
| WEBKIT_APPEND_GLOBAL_COMPILER_FLAGS(-fno-exceptions) |
| WEBKIT_APPEND_GLOBAL_CXX_FLAGS(-fno-rtti) |
| |
| WEBKIT_PREPEND_GLOBAL_COMPILER_FLAGS(-Wno-tautological-compare) |
| |
| if (WIN32) |
| WEBKIT_APPEND_GLOBAL_COMPILER_FLAGS(-mno-ms-bitfields) |
| WEBKIT_PREPEND_GLOBAL_COMPILER_FLAGS(-Wno-unknown-pragmas) |
| add_definitions(-D__USE_MINGW_ANSI_STDIO=1) |
| endif () |
| endif () |
| |
| # Warnings to be enabled |
| WEBKIT_PREPEND_GLOBAL_COMPILER_FLAGS(-Wcast-align |
| -Wformat-security |
| -Wmissing-format-attribute |
| -Wpointer-arith |
| -Wundef |
| -Wwrite-strings) |
| |
| # Warnings to be disabled |
| # FIXME: We should probably not be disabling -Wno-maybe-uninitialized? |
| WEBKIT_PREPEND_GLOBAL_COMPILER_FLAGS(-Qunused-arguments |
| -Wno-maybe-uninitialized |
| -Wno-parentheses-equality |
| -Wno-misleading-indentation |
| -Wno-psabi) |
| |
| WEBKIT_PREPEND_GLOBAL_CXX_FLAGS(-Wno-noexcept-type) |
| |
| # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80947 |
| if (${CMAKE_CXX_COMPILER_VERSION} VERSION_LESS "8.0" AND NOT CMAKE_CXX_COMPILER_ID MATCHES "Clang") |
| WEBKIT_PREPEND_GLOBAL_CXX_FLAGS(-Wno-attributes) |
| endif () |
| |
| # Since GCC 11, these warnings produce too many false positives to be useful. We'll rely on |
| # developers who build with Clang to notice these warnings. |
| if (CMAKE_CXX_COMPILER_ID MATCHES "GNU" AND ${CMAKE_CXX_COMPILER_VERSION} VERSION_GREATER_EQUAL "11.0") |
| WEBKIT_PREPEND_GLOBAL_CXX_FLAGS(-Wno-array-bounds) |
| WEBKIT_PREPEND_GLOBAL_CXX_FLAGS(-Wno-nonnull) |
| endif () |
| |
| # This triggers warnings in wtf/Packed.h, a header that is included in many places. It does not |
| # respect ignore warning pragmas and we cannot easily suppress it for all affected files. |
| # https://bugs.webkit.org/show_bug.cgi?id=226557 |
| if (CMAKE_CXX_COMPILER_ID MATCHES "GNU" AND ${CMAKE_CXX_COMPILER_VERSION} VERSION_GREATER_EQUAL "11.0") |
| WEBKIT_PREPEND_GLOBAL_CXX_FLAGS(-Wno-stringop-overread) |
| endif () |
| |
| # -Wexpansion-to-defined produces false positives with GCC but not Clang |
| # https://bugs.webkit.org/show_bug.cgi?id=167643#c13 |
| if (CMAKE_CXX_COMPILER_ID MATCHES "GNU") |
| WEBKIT_PREPEND_GLOBAL_COMPILER_FLAGS(-Wno-expansion-to-defined) |
| endif () |
| |
| # Force SSE2 fp on x86 builds. |
| if (WTF_CPU_X86 AND NOT CMAKE_CROSSCOMPILING) |
| WEBKIT_PREPEND_GLOBAL_COMPILER_FLAGS(-msse2 -mfpmath=sse) |
| include(DetectSSE2) |
| if (NOT SSE2_SUPPORT_FOUND) |
| message(FATAL_ERROR "SSE2 support is required to compile WebKit") |
| endif () |
| endif () |
| endif () |
| |
| if (COMPILER_IS_GCC_OR_CLANG AND NOT MSVC) |
| # Don't give -Wall to clang-cl because clang-cl treats /Wall and -Wall as -Weverything. |
| # -Wall and -Wextra should be specified before -Wno-* for Clang. |
| WEBKIT_PREPEND_GLOBAL_COMPILER_FLAGS(-Wall -Wextra) |
| 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 ${CMAKE_SHARED_LINKER_FLAGS_DEBUG}") |
| endif () |
| |
| if (LTO_MODE AND COMPILER_IS_CLANG) |
| set(CMAKE_C_FLAGS "-flto=${LTO_MODE} ${CMAKE_C_FLAGS}") |
| set(CMAKE_CXX_FLAGS "-flto=${LTO_MODE} ${CMAKE_CXX_FLAGS}") |
| set(CMAKE_EXE_LINKER_FLAGS "-flto=${LTO_MODE} ${CMAKE_EXE_LINKER_FLAGS}") |
| set(CMAKE_SHARED_LINKER_FLAGS "-flto=${LTO_MODE} ${CMAKE_SHARED_LINKER_FLAGS}") |
| set(CMAKE_MODULE_LINKER_FLAGS "-flto=${LTO_MODE} ${CMAKE_MODULE_LINKER_FLAGS}") |
| 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=* flags, because check_cxx_compiler_flag will report it's |
| # unsupported, because it causes the build to fail if not used when linking. |
| if (ENABLE_SANITIZERS) |
| if (MSVC AND WTF_CPU_X86_64) |
| find_library(CLANG_ASAN_LIBRARY clang_rt.asan_dynamic_runtime_thunk-x86_64 ${CLANG_LIB_PATH}) |
| find_library(CLANG_ASAN_RT_LIBRARY clang_rt.asan_dynamic-x86_64 PATHS ${CLANG_LIB_PATH}) |
| set(SANITIZER_LINK_FLAGS "\"${CLANG_ASAN_LIBRARY}\" \"${CLANG_ASAN_RT_LIBRARY}\"") |
| else () |
| set(SANITIZER_LINK_FLAGS "-lpthread") |
| endif () |
| |
| foreach (SANITIZER ${ENABLE_SANITIZERS}) |
| if (${SANITIZER} MATCHES "address") |
| WEBKIT_PREPEND_GLOBAL_COMPILER_FLAGS("-fno-omit-frame-pointer -fno-optimize-sibling-calls") |
| set(SANITIZER_COMPILER_FLAGS "-fsanitize=address ${SANITIZER_COMPILER_FLAGS}") |
| set(SANITIZER_LINK_FLAGS "-fsanitize=address ${SANITIZER_LINK_FLAGS}") |
| |
| elseif (${SANITIZER} MATCHES "undefined") |
| # Please keep these options synchronized with Tools/sanitizer/ubsan.xcconfig |
| WEBKIT_PREPEND_GLOBAL_COMPILER_FLAGS("-fno-omit-frame-pointer -fno-delete-null-pointer-checks -fno-optimize-sibling-calls") |
| # -fsanitize=vptr is disabled because incompatible with -fno-rtti |
| set(SANITIZER_COMPILER_FLAGS "-fsanitize=undefined -fno-sanitize=vptr ${SANITIZER_COMPILER_FLAGS}") |
| set(SANITIZER_LINK_FLAGS "-fsanitize=undefined ${SANITIZER_LINK_FLAGS}") |
| |
| elseif (${SANITIZER} MATCHES "thread" AND NOT MSVC) |
| set(SANITIZER_COMPILER_FLAGS "-fsanitize=thread ${SANITIZER_COMPILER_FLAGS}") |
| set(SANITIZER_LINK_FLAGS "-fsanitize=thread ${SANITIZER_LINK_FLAGS}") |
| |
| elseif (${SANITIZER} MATCHES "memory" AND COMPILER_IS_CLANG AND NOT MSVC) |
| set(SANITIZER_COMPILER_FLAGS "-fsanitize=memory ${SANITIZER_COMPILER_FLAGS}") |
| set(SANITIZER_LINK_FLAGS "-fsanitize=memory ${SANITIZER_LINK_FLAGS}") |
| |
| elseif (${SANITIZER} MATCHES "leak" AND NOT MSVC) |
| set(SANITIZER_COMPILER_FLAGS "-fsanitize=leak ${SANITIZER_COMPILER_FLAGS}") |
| set(SANITIZER_LINK_FLAGS "-fsanitize=leak ${SANITIZER_LINK_FLAGS}") |
| |
| else () |
| message(FATAL_ERROR "Unsupported sanitizer: ${SANITIZER}") |
| endif () |
| endforeach () |
| |
| set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${SANITIZER_COMPILER_FLAGS}") |
| set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${SANITIZER_COMPILER_FLAGS}") |
| set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${SANITIZER_LINK_FLAGS}") |
| set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${SANITIZER_LINK_FLAGS}") |
| set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} ${SANITIZER_LINK_FLAGS}") |
| 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 ${CMAKE_SHARED_LINKER_FLAGS}") |
| endif () |
| |
| |
| if (MSVC) |
| set(CODE_GENERATOR_PREPROCESSOR "\"${CMAKE_CXX_COMPILER}\" /nologo /EP /TP") |
| else () |
| set(CODE_GENERATOR_PREPROCESSOR "\"${CMAKE_CXX_COMPILER}\" -E -P -x c++") |
| endif () |
| |
| |
| # Ensure that the default include system directories are added to the list of CMake implicit includes. |
| # This workarounds an issue that happens when using GCC 6 and using system includes (-isystem). |
| # For more details check: https://bugs.webkit.org/show_bug.cgi?id=161697 |
| macro(DETERMINE_GCC_SYSTEM_INCLUDE_DIRS _lang _compiler _flags _result) |
| file(WRITE "${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} ${SYSTEM_INCLUDE_DIRS}) |
| endif () |
| |
| if (COMPILER_IS_GCC_OR_CLANG) |
| set(ATOMIC_TEST_SOURCE " |
| #include <atomic> |
| int main() { |
| std::atomic<bool> y (false); |
| std::atomic<uint64_t> x (0); |
| bool expected = true; |
| bool j = y.compare_exchange_weak(expected,false); |
| x++; |
| return 0; |
| } |
| ") |
| check_cxx_source_compiles("${ATOMIC_TEST_SOURCE}" ATOMICS_ARE_BUILTIN) |
| if (NOT ATOMICS_ARE_BUILTIN) |
| set(CMAKE_REQUIRED_LIBRARIES atomic) |
| check_cxx_source_compiles("${ATOMIC_TEST_SOURCE}" ATOMICS_REQUIRE_LIBATOMIC) |
| unset(CMAKE_REQUIRED_LIBRARIES) |
| endif () |
| |
| # <filesystem> vs <experimental/filesystem> |
| set(FILESYSTEM_TEST_SOURCE " |
| #include <filesystem> |
| int main() { std::filesystem::path p1(\"\"); std::filesystem::status(p1); } |
| ") |
| set(CMAKE_REQUIRED_FLAGS "--std=c++17") |
| check_cxx_source_compiles("${FILESYSTEM_TEST_SOURCE}" STD_FILESYSTEM_IS_AVAILABLE) |
| if (NOT STD_FILESYSTEM_IS_AVAILABLE) |
| set(EXPERIMENTAL_FILESYSTEM_TEST_SOURCE " |
| #include <experimental/filesystem> |
| int main() { |
| std::experimental::filesystem::path p1(\"//home\"); |
| std::experimental::filesystem::status(p1); |
| } |
| ") |
| set(CMAKE_REQUIRED_LIBRARIES stdc++fs) |
| check_cxx_source_compiles("${EXPERIMENTAL_FILESYSTEM_TEST_SOURCE}" STD_EXPERIMENTAL_FILESYSTEM_IS_AVAILABLE) |
| unset(CMAKE_REQUIRED_LIBRARIES) |
| endif () |
| unset(CMAKE_REQUIRED_FLAGS) |
| endif () |
| |
| if (CMAKE_CXX_COMPILER_ID MATCHES "GNU" AND WTF_CPU_MIPS) |
| # Work around https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78176. |
| # This only manifests when executing 32-bit code on a 64-bit |
| # processor. This is a workaround and does not cover all cases |
| # (see comment #28 in the link above). |
| WEBKIT_PREPEND_GLOBAL_COMPILER_FLAGS(-mno-lxc1-sxc1) |
| endif () |
