qtbase/cmake/QtCompilerFlags.cmake
Tor Arne Vestbø ce23c9083f cmake: Only enable warnings on/off flags for C/C++/Objective-C/C++
The flags are not valid for e.g. Swift

Pick-to: 6.7
Change-Id: Ie5b46dc9147d8c024e7e27712c7b8632abd727d9
Reviewed-by:  Alexey Edelev <alexey.edelev@qt.io>
2024-04-07 20:24:12 +02:00

40 lines
1.7 KiB
CMake

# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: BSD-3-Clause
# Enable compiler warnings by default. All compilers except MSVC support -Wall -Wextra
#
# You can disable the warnings for specific targets (for instance containing 3rd party code)
# by calling qt_disable_warnings(target). This will set the QT_COMPILE_OPTIONS_DISABLE_WARNINGS
# property checked below, and is equivalent to qmake's CONFIG += warn_off.
set(_qt_compiler_warning_flags_on "")
set(_qt_compiler_warning_flags_off -w)
if (MSVC)
list(APPEND _qt_compiler_warning_flags_on /W3)
else()
if(CMAKE_CXX_COMPILER_ID STREQUAL "GHS") # There is no -Wextra flag for GHS compiler.
list(APPEND _qt_compiler_warning_flags_on -Wall)
else()
list(APPEND _qt_compiler_warning_flags_on -Wall -Wextra)
endif()
endif()
set(_qt_compiler_warning_flags_condition
"$<BOOL:$<TARGET_PROPERTY:QT_COMPILE_OPTIONS_DISABLE_WARNINGS>>")
set(_qt_compiler_warning_flags_genex
"$<IF:${_qt_compiler_warning_flags_condition},${_qt_compiler_warning_flags_off},${_qt_compiler_warning_flags_on}>")
set(_qt_compiler_warning_flags_language_condition
"$<COMPILE_LANGUAGE:CXX,C,OBJC,OBJCXX>")
set(_qt_compiler_warning_flags_language_conditional_genex
"$<${_qt_compiler_warning_flags_language_condition}:${_qt_compiler_warning_flags_genex}>")
# Need to replace semicolons so that the list is not wrongly expanded in the add_compile_options
# call.
string(REPLACE ";" "$<SEMICOLON>"
_qt_compiler_warning_flags_language_conditional_genex
"${_qt_compiler_warning_flags_language_conditional_genex}")
add_compile_options(${_qt_compiler_warning_flags_language_conditional_genex})