function(qt_internal_set_warnings_are_errors_flags target) set(flags "") if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang") # Regular clang 3.0+ if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "3.0.0") list(APPEND flags -Werror -Wno-error=\#warnings -Wno-error=deprecated-declarations) endif() elseif ("${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 ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC") # In qmake land, currently warnings as errors are only enabled for # MSVC 2012, 2013, 2015. # Respectively MSVC_VERRSIONs are: 1700-1799, 1800-1899, 1900-1909. if(MSVC_VERSION GREATER_EQUAL 1700 AND MSVC_VERSION LESS_EQUAL 1909) list(APPEND flags /WX) endif() endif() set(warnings_are_errors_enabled_genex "$>>") # 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 "$,$>") set(final_condition_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(PlatformToolInternal INTERFACE) add_library(Qt::PlatformToolInternal ALIAS PlatformToolInternal) target_link_libraries(PlatformToolInternal INTERFACE PlatformCommonInternal) 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(PlatformToolInternal) 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(PlatformModuleInternal 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. if (ANDROID) target_link_options(PlatformModuleInternal INTERFACE -fuse-ld=lld) endif() target_compile_definitions(PlatformCommonInternal INTERFACE $<$>:QT_NO_DEBUG>) 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() 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 -Zc:throwingNew ) endif() if (MSVC_VERSION GREATER_EQUAL 1909) target_compile_options(PlatformCommonInternal INTERFACE -Zc:referenceBinding ) endif() target_compile_options(PlatformCommonInternal INTERFACE -Zc:wchar_t -utf-8) target_link_options(PlatformCommonInternal INTERFACE -DYNAMICBASE -NXCOMPAT $<$:-OPT:REF> $<$:-OPT:REF> ) endif() function(qt_get_implicit_sse2_genex_condition out_var) set(is_shared_lib "$,SHARED_LIBRARY>") set(is_static_lib "$,STATIC_LIBRARY>") set(is_static_qt_build "$>") set(is_staitc_lib_during_static_qt_build "$") set(enable_sse2_condition "$") set(${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()