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qt5base-lts/cmake/QtInternalTargets.cmake
Yuhang Zhao 4b694032df Improve clang-cl support for Qt6 
1. clang-cl doesn't support "-fno-exceptions", it uses msvc's parameter.
2. some parameters supported by msvc are not supported by clang-cl
and they are causing huge warning message flood, don't add them.
3. use correct optimize parameter for clang-cl.

Change-Id: Idbadf139127143c5fa6c49068588cb26f47da7a2
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
2020-11-02 20:06:22 +08:00

314 lines
14 KiB
CMake
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function(qt_internal_set_warnings_are_errors_flags target)
set(flags "")
if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
# Regular clang 3.0+
if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "3.0.0")
list(APPEND flags -Werror -Wno-error=\#warnings -Wno-error=deprecated-declarations)
endif()
if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows")
# Clang will otherwise show error about inline method conflicting with dllimport class attribute in tools
# (this was tested with Clang 10)
# error: 'QString::operator[]' redeclared inline; 'dllimport' attribute ignored [-Werror,-Wignored-attributes]
list(APPEND flags -Wno-ignored-attributes)
endif()
elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "AppleClang")
# using AppleClang
# Apple clang 4.0+
if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "4.0.0" AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS_EQUAL "9.2")
list(APPEND flags -Werror -Wno-error=\#warnings -Wno-error=deprecated-declarations)
endif()
elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
# using GCC
list(APPEND flags -Werror -Wno-error=cpp -Wno-error=deprecated-declarations)
# GCC prints this bogus warning, after it has inlined a lot of code
# error: assuming signed overflow does not occur when assuming that (X + c) < X is always false
list(APPEND flags -Wno-error=strict-overflow)
# GCC 7 includes -Wimplicit-fallthrough in -Wextra, but Qt is not yet free of implicit fallthroughs.
if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "7.0.0")
list(APPEND flags -Wno-error=implicit-fallthrough)
endif()
if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "9.0.0")
# GCC 9 introduced these but we are not clean for it.
list(APPEND flags -Wno-error=deprecated-copy -Wno-error=redundant-move -Wno-error=init-list-lifetime)
# GCC 9 introduced -Wformat-overflow in -Wall, but it is buggy:
list(APPEND flags -Wno-error=format-overflow)
endif()
# Work-around for bug https://code.google.com/p/android/issues/detail?id=58135
if (ANDROID)
list(APPEND flags -Wno-error=literal-suffix)
endif()
elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel")
# Intel CC 13.0 +, on Linux only
if (LINUX)
if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "13.0.0")
# 177: function "entity" was declared but never referenced
# (too aggressive; ICC reports even for functions created due to template instantiation)
# 1224: #warning directive
# 1478: function "entity" (declared at line N) was declared deprecated
# 1786: function "entity" (declared at line N of "file") was declared deprecated ("message")
# 1881: argument must be a constant null pointer value
# (NULL in C++ is usually a literal 0)
list(APPEND flags -Werror -ww177,1224,1478,1786,1881)
endif()
endif()
elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
# In qmake land, currently warnings as errors are only enabled for
# MSVC 2012, 2013, 2015.
# Respectively MSVC_VERRSIONs are: 1700-1799, 1800-1899, 1900-1909.
if(MSVC_VERSION GREATER_EQUAL 1700 AND MSVC_VERSION LESS_EQUAL 1909)
list(APPEND flags /WX)
endif()
endif()
set(warnings_are_errors_enabled_genex
"$<NOT:$<BOOL:$<TARGET_PROPERTY:QT_SKIP_WARNINGS_ARE_ERRORS>>>")
# Apprently qmake only adds -Werror to CXX and OBJCXX files, not C files. We have to do the
# same otherwise MinGW builds break when building 3rdparty\md4c\md4c.c (and probably on other
# platforms too).
set(cxx_only_genex "$<OR:$<COMPILE_LANGUAGE:CXX>,$<COMPILE_LANGUAGE:OBJCXX>>")
set(final_condition_genex "$<AND:${warnings_are_errors_enabled_genex},${cxx_only_genex}>")
set(flags_generator_expression "$<${final_condition_genex}:${flags}>")
target_compile_options("${target}" INTERFACE "${flags_generator_expression}")
endfunction()
add_library(PlatformCommonInternal INTERFACE)
add_library(Qt::PlatformCommonInternal ALIAS PlatformCommonInternal)
add_library(PlatformModuleInternal INTERFACE)
add_library(Qt::PlatformModuleInternal ALIAS PlatformModuleInternal)
target_link_libraries(PlatformModuleInternal INTERFACE PlatformCommonInternal)
add_library(PlatformPluginInternal INTERFACE)
add_library(Qt::PlatformPluginInternal ALIAS PlatformPluginInternal)
target_link_libraries(PlatformPluginInternal INTERFACE PlatformCommonInternal)
add_library(PlatformAppInternal INTERFACE)
add_library(Qt::PlatformAppInternal ALIAS PlatformAppInternal)
target_link_libraries(PlatformAppInternal INTERFACE PlatformCommonInternal)
add_library(PlatformToolInternal INTERFACE)
add_library(Qt::PlatformToolInternal ALIAS PlatformToolInternal)
target_link_libraries(PlatformToolInternal INTERFACE PlatformAppInternal)
if(WARNINGS_ARE_ERRORS)
qt_internal_set_warnings_are_errors_flags(PlatformModuleInternal)
qt_internal_set_warnings_are_errors_flags(PlatformPluginInternal)
qt_internal_set_warnings_are_errors_flags(PlatformAppInternal)
endif()
if(WIN32)
# Needed for M_PI define. Same as mkspecs/features/qt_module.prf.
# It's set for every module being built, but it's not propagated to user apps.
target_compile_definitions(PlatformModuleInternal INTERFACE _USE_MATH_DEFINES)
endif()
if(FEATURE_largefile AND UNIX)
target_compile_definitions(PlatformCommonInternal
INTERFACE "_LARGEFILE64_SOURCE;_LARGEFILE_SOURCE")
endif()
# We can't use the gold linker on android with the NDK, which is the default
# linker. To build our own target we will use the lld linker.
# TODO: Why not?
# Linking Android libs with lld on Windows sometimes deadlocks. Don't use lld on
# Windows. qmake doesn't use lld to build Android on any host platform.
if (ANDROID AND NOT CMAKE_HOST_WIN32)
target_link_options(PlatformModuleInternal INTERFACE -fuse-ld=lld)
endif()
target_compile_definitions(PlatformCommonInternal INTERFACE $<$<NOT:$<CONFIG:Debug>>:QT_NO_DEBUG>)
if(MSVC)
# To mimic mkspecs/common/msvc-desktop.conf add optimization flag for non-debug configs.
# In qmake, the flag is added to any user project built with qmake. In CMake land, to be on the
# safe side, only add when building Qt itself.
target_link_options(PlatformCommonInternal INTERFACE "$<$<NOT:$<CONFIG:Debug>>:/OPT:REF>")
endif()
function(qt_internal_apply_bitcode_flags target)
# See mkspecs/features/uikit/bitcode.prf
set(release_flags "-fembed-bitcode")
set(debug_flags "-fembed-bitcode-marker")
set(is_release_genex "$<NOT:$<CONFIG:Debug>>")
set(flags_genex "$<IF:${is_release_genex},${release_flags},${debug_flags}>")
set(is_enabled_genex "$<NOT:$<BOOL:$<TARGET_PROPERTY:QT_NO_BITCODE>>>")
set(bitcode_flags "$<${is_enabled_genex}:${flags_genex}>")
target_link_options("${target}" INTERFACE ${bitcode_flags})
target_compile_options("${target}" INTERFACE ${bitcode_flags})
endfunction()
# Apple deprecated the entire OpenGL API in favor of Metal, which
# we are aware of, so silence the deprecation warnings in code.
# This does not apply to user-code, which will need to silence
# their own warnings if they use the deprecated APIs explicitly.
if(MACOS)
target_compile_definitions(PlatformCommonInternal INTERFACE GL_SILENCE_DEPRECATION)
elseif(UIKIT)
target_compile_definitions(PlatformCommonInternal INTERFACE GLES_SILENCE_DEPRECATION)
endif()
if(UIKIT)
# Do what mkspecs/features/uikit/default_pre.prf does, aka enable sse2 for
# simulator_and_device_builds.
if(FEATURE_simulator_and_device)
# Setting the definition on PlatformCommonInternal behaves slightly differently from what
# is done in qmake land. This way the define is not propagated to tests, examples, or
# user projects built with qmake, but only modules, plugins and tools.
# TODO: Figure out if this ok or not (sounds ok to me).
target_compile_definitions(PlatformCommonInternal INTERFACE QT_COMPILER_SUPPORTS_SSE2)
endif()
qt_internal_apply_bitcode_flags(PlatformCommonInternal)
endif()
# Taken from mkspecs/common/msvc-version.conf and mkspecs/common/msvc-desktop.conf
if (MSVC)
if (MSVC_VERSION GREATER_EQUAL 1799)
target_compile_options(PlatformCommonInternal INTERFACE
-FS
-Zc:rvalueCast
-Zc:inline
)
endif()
if (MSVC_VERSION GREATER_EQUAL 1899)
target_compile_options(PlatformCommonInternal INTERFACE
-Zc:strictStrings
)
if (NOT CLANG)
target_compile_options(PlatformCommonInternal INTERFACE
-Zc:throwingNew
)
endif()
endif()
if (MSVC_VERSION GREATER_EQUAL 1909 AND NOT CLANG)
target_compile_options(PlatformCommonInternal INTERFACE
-Zc:referenceBinding
)
endif()
if (MSVC_VERSION GREATER_EQUAL 1919 AND NOT CLANG)
target_compile_options(PlatformCommonInternal INTERFACE
-Zc:externConstexpr
)
endif()
target_compile_options(PlatformCommonInternal INTERFACE -Zc:wchar_t)
target_link_options(PlatformCommonInternal INTERFACE
-DYNAMICBASE -NXCOMPAT
$<$<CONFIG:Release>:-OPT:REF>
$<$<CONFIG:RelWithDebInfo>:-OPT:REF>
)
endif()
if (GCC AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "9.2")
target_compile_options(PlatformCommonInternal INTERFACE $<$<COMPILE_LANGUAGE:CXX>:-Wsuggest-override>)
endif()
if(QT_FEATURE_force_asserts)
target_compile_definitions(PlatformCommonInternal INTERFACE QT_FORCE_ASSERTS)
endif()
if(DEFINED QT_EXTRA_DEFINES)
target_compile_definitions(PlatformCommonInternal INTERFACE ${QT_EXTRA_DEFINES})
endif()
if(DEFINED QT_EXTRA_INCLUDEPATHS)
target_include_directories(PlatformCommonInternal INTERFACE ${QT_EXTRA_INCLUDEPATHS})
endif()
if(DEFINED QT_EXTRA_LIBDIRS)
target_link_directories(PlatformCommonInternal INTERFACE ${QT_EXTRA_LIBDIRS})
endif()
if(DEFINED QT_EXTRA_FRAMEWORKPATHS AND APPLE)
list(TRANSFORM QT_EXTRA_FRAMEWORKPATHS PREPEND "-F" OUTPUT_VARIABLE __qt_fw_flags)
target_compile_options(PlatformCommonInternal INTERFACE ${__qt_fw_flags})
target_link_options(PlatformCommonInternal INTERFACE ${__qt_fw_flags})
unset(__qt_fw_flags)
endif()
if(QT_FEATURE_use_gold_linker)
target_link_options(PlatformCommonInternal INTERFACE "-fuse-ld=gold")
elseif(QT_FEATURE_use_bfd_linker)
target_link_options(PlatformCommonInternal INTERFACE "-fuse-ld=bfd")
elseif(QT_FEATURE_use_lld_linker)
target_link_options(PlatformCommonInternal INTERFACE "-fuse-ld=lld")
endif()
if(QT_FEATURE_enable_gdb_index)
target_link_options(PlatformCommonInternal INTERFACE "-Wl,--gdb-index")
endif()
function(qt_get_implicit_sse2_genex_condition out_var)
set(is_shared_lib "$<STREQUAL:$<TARGET_PROPERTY:TYPE>,SHARED_LIBRARY>")
set(is_static_lib "$<STREQUAL:$<TARGET_PROPERTY:TYPE>,STATIC_LIBRARY>")
set(is_static_qt_build "$<NOT:$<BOOL:${QT_BUILD_SHARED_LIBS}>>")
set(is_staitc_lib_during_static_qt_build "$<AND:${is_static_qt_build},${is_static_lib}>")
set(enable_sse2_condition "$<OR:${is_shared_lib},${is_staitc_lib_during_static_qt_build}>")
set(${out_var} "${enable_sse2_condition}" PARENT_SCOPE)
endfunction()
function(qt_auto_detect_implicit_sse2)
# sse2 configuration adjustment in qt_module.prf
# If the compiler supports SSE2, enable it unconditionally in all of Qt shared libraries
# (and only the libraries). This is not expected to be a problem because:
# - on Windows, sharing of libraries is uncommon
# - on Mac OS X, all x86 CPUs already have SSE2 support (we won't even reach here)
# - on Linux, the dynamic loader can find the libraries on LIBDIR/sse2/
# The last guarantee does not apply to executables and plugins, so we can't enable for them.
set(__implicit_sse2_for_qt_modules_enabled FALSE PARENT_SCOPE)
if(TEST_subarch_sse2 AND NOT TEST_arch_${TEST_architecture_arch}_subarch_sse2)
qt_get_implicit_sse2_genex_condition(enable_sse2_condition)
set(enable_sse2_genex "$<${enable_sse2_condition}:${QT_CFLAGS_SSE2}>")
target_compile_options(PlatformModuleInternal INTERFACE ${enable_sse2_genex})
set(__implicit_sse2_for_qt_modules_enabled TRUE PARENT_SCOPE)
endif()
endfunction()
qt_auto_detect_implicit_sse2()
function(qt_auto_detect_fpmath)
# fpmath configuration adjustment in qt_module.prf
set(fpmath_supported FALSE)
if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "3.4")
set(fpmath_supported TRUE)
endif()
elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "AppleClang")
if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "5.1")
set(fpmath_supported TRUE)
endif()
elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
set(fpmath_supported TRUE)
endif()
if(fpmath_supported AND TEST_architecture_arch STREQUAL "i386" AND __implicit_sse2_for_qt_modules_enabled)
qt_get_implicit_sse2_genex_condition(enable_sse2_condition)
set(enable_fpmath_genex "$<${enable_sse2_condition}:-mfpmath=sse>")
target_compile_options(PlatformModuleInternal INTERFACE ${enable_fpmath_genex})
endif()
endfunction()
qt_auto_detect_fpmath()
function(qt_handle_apple_app_extension_api_only)
if(APPLE)
# Build Qt libraries with -fapplication-extension. Needed to avoid linker warnings
# transformed into errors on darwin platforms.
set(flags "-fapplication-extension")
set(genex_condition "$<NOT:$<BOOL:$<TARGET_PROPERTY:QT_NO_APP_EXTENSION_ONLY_API>>>")
set(flags "$<${genex_condition}:${flags}>")
target_compile_options(PlatformModuleInternal INTERFACE ${flags})
target_link_options(PlatformModuleInternal INTERFACE ${flags})
target_compile_options(PlatformPluginInternal INTERFACE ${flags})
target_link_options(PlatformPluginInternal INTERFACE ${flags})
endif()
endfunction()
function(qt_disable_apple_app_extension_api_only target)
set_target_properties("${target}" PROPERTIES QT_NO_APP_EXTENSION_ONLY_API TRUE)
endfunction()
qt_handle_apple_app_extension_api_only()
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