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function(qt_internal_set_warnings_are_errors_flags target)
set(flags "")
if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
# Regular clang 3.0+
if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "3.0.0")
list(APPEND flags -Werror -Wno-error=\#warnings -Wno-error=deprecated-declarations)
endif()
elseif ("${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 ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
# using GCC
list(APPEND flags -Werror -Wno-error=cpp -Wno-error=deprecated-declarations)
# GCC prints this bogus warning, after it has inlined a lot of code
# error: assuming signed overflow does not occur when assuming that (X + c) < X is always false
list(APPEND flags -Wno-error=strict-overflow)
# GCC 7 includes -Wimplicit-fallthrough in -Wextra, but Qt is not yet free of implicit fallthroughs.
if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "7.0.0")
list(APPEND flags -Wno-error=implicit-fallthrough)
endif()
if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "9.0.0")
# GCC 9 introduced these but we are not clean for it.
list(APPEND flags -Wno-error=deprecated-copy -Wno-error=redundant-move -Wno-error=init-list-lifetime)
endif()
# Work-around for bug https://code.google.com/p/android/issues/detail?id=58135
if (ANDROID)
list(APPEND flags -Wno-error=literal-suffix)
endif()
elseif ("${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 ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
# In qmake land, currently warnings as errors are only enabled for
# MSVC 2012, 2013, 2015.
# Respectively MSVC_VERRSIONs are: 1700-1799, 1800-1899, 1900-1909.
if(MSVC_VERSION GREATER_EQUAL 1700 AND MSVC_VERSION LESS_EQUAL 1909)
list(APPEND flags /WX)
endif()
endif()
set(add_flags "$<NOT:$<BOOL:$<TARGET_PROPERTY:QT_SKIP_WARNINGS_ARE_ERRORS>>>")
set(flags_generator_expression "$<${add_flags}:${flags}>")
target_compile_options("${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()
if(NOT CMAKE_BUILD_TYPE STREQUAL Debug)
target_compile_definitions(PlatformCommonInternal INTERFACE QT_NO_DEBUG)
endif()
if(APPLE_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()
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