qt5base-lts/mkspecs/features/default_post.prf
Joerg Bornemann b5ed3cb7ba qmake: Add support for C++23
Add the CONFIG value c++2b that represent the upcoming C++23 standard.
Add QMAKE_CXXFLAGS_CXX2B and QMAKE_CXXFLAGS_GNUCXX2B.
On MSVC, use /std:c++latest when c++2b is active.

This fixes an issue with MSVC where c++latest implied the /std:c++20
compiler flag.

Pick-to: 5.15 6.2 6.3
Fixes: QTBUG-102202
Change-Id: Ie00ee5793c1a649195013c8c19efc8d59cf0acc9
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
Reviewed-by: Kai Koehne <kai.koehne@qt.io>
2022-04-05 14:27:50 +02:00

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# This file is loaded by qmake right after loading the actual project file.
contains(TEMPLATE, ".*(lib|app)"):CONFIG += have_target
!have_target:!force_qt: CONFIG -= qt
load(resolve_config)
exclusive_builds: load(exclusive_builds_post)
# If the TARGET looks like a path, split it into DESTDIR and the resulting TARGET
target_dir_part = $$dirname(TARGET)
!isEmpty(target_dir_part) {
isEmpty(DESTDIR): \
DESTDIR = $$target_dir_part
else: \
DESTDIR = $$DESTDIR/$$target_dir_part
TARGET = $$basename(TARGET)
DESTDIR = $$clean_path($$DESTDIR)
}
QT_BREAKPAD_ROOT_PATH = $$(QT_BREAKPAD_ROOT_PATH)
!isEmpty(QT_BREAKPAD_ROOT_PATH): \ # quick test first whether requested ...
!static:release:have_target: \ # is it applicable?
!contains(TARGET, .*phony_target.*): \ # monster hack, you don't really see this here, right? ;)
system($$QT_BREAKPAD_ROOT_PATH/qtbreakpadsymbols --breakpad-exists) { # do we really have it?
CONFIG += breakpad force_debug_info
CONFIG -= no_debug_info separate_debug_info
}
force_debug_info|debug: \
CONFIG += debug_info
force_debug_info {
QMAKE_CFLAGS_RELEASE = $$QMAKE_CFLAGS_RELEASE_WITH_DEBUGINFO
QMAKE_CXXFLAGS_RELEASE = $$QMAKE_CXXFLAGS_RELEASE_WITH_DEBUGINFO
QMAKE_LFLAGS_RELEASE = $$QMAKE_LFLAGS_RELEASE_WITH_DEBUGINFO
}
optimize_size {
!isEmpty(QMAKE_CFLAGS_OPTIMIZE):!isEmpty(QMAKE_CFLAGS_OPTIMIZE_SIZE) {
QMAKE_CFLAGS_RELEASE -= $$QMAKE_CFLAGS_OPTIMIZE
QMAKE_CXXFLAGS_RELEASE -= $$QMAKE_CFLAGS_OPTIMIZE
QMAKE_CFLAGS_RELEASE += $$QMAKE_CFLAGS_OPTIMIZE_SIZE
QMAKE_CXXFLAGS_RELEASE += $$QMAKE_CFLAGS_OPTIMIZE_SIZE
}
} else: optimize_full {
!isEmpty(QMAKE_CFLAGS_OPTIMIZE):!isEmpty(QMAKE_CFLAGS_OPTIMIZE_FULL) {
QMAKE_CFLAGS_RELEASE -= $$QMAKE_CFLAGS_OPTIMIZE
QMAKE_CXXFLAGS_RELEASE -= $$QMAKE_CFLAGS_OPTIMIZE
QMAKE_CFLAGS_RELEASE += $$QMAKE_CFLAGS_OPTIMIZE_FULL
QMAKE_CXXFLAGS_RELEASE += $$QMAKE_CFLAGS_OPTIMIZE_FULL
}
}
optimize_debug {
QMAKE_CFLAGS_DEBUG += $$QMAKE_CFLAGS_OPTIMIZE_DEBUG
QMAKE_CXXFLAGS_DEBUG += $$QMAKE_CFLAGS_OPTIMIZE_DEBUG
}
debug {
QMAKE_CFLAGS += $$QMAKE_CFLAGS_DEBUG
QMAKE_CXXFLAGS += $$QMAKE_CXXFLAGS_DEBUG
QMAKE_LFLAGS += $$QMAKE_LFLAGS_DEBUG
QMAKE_LIBFLAGS += $$QMAKE_LIBFLAGS_DEBUG
DEFINES += $$DEFINES_DEBUG
} else {
QMAKE_CFLAGS += $$QMAKE_CFLAGS_RELEASE
QMAKE_CXXFLAGS += $$QMAKE_CXXFLAGS_RELEASE
QMAKE_LFLAGS += $$QMAKE_LFLAGS_RELEASE
QMAKE_LIBFLAGS += $$QMAKE_LIBFLAGS_RELEASE
DEFINES += $$DEFINES_RELEASE
}
stack_protector_strong {
QMAKE_CFLAGS += $$QMAKE_CFLAGS_STACK_PROTECTOR_STRONG
QMAKE_CXXFLAGS += $$QMAKE_CFLAGS_STACK_PROTECTOR_STRONG
}
# disable special linker flags for host builds (no proper test for host support yet)
!host_build|!cross_compile {
use_bfd_linker: QMAKE_LFLAGS += $$QMAKE_LFLAGS_USE_BFD
use_gold_linker: QMAKE_LFLAGS += $$QMAKE_LFLAGS_USE_GOLD
use_lld_linker: QMAKE_LFLAGS += $$QMAKE_LFLAGS_USE_LLD
enable_new_dtags: QMAKE_LFLAGS += $$QMAKE_LFLAGS_NEW_DTAGS
enable_gdb_index: QMAKE_LFLAGS += $$QMAKE_LFLAGS_GDB_INDEX
}
dll:win32: QMAKE_LFLAGS += $$QMAKE_LFLAGS_DLL
static:mac: QMAKE_LFLAGS += $$QMAKE_LFLAGS_STATIC_LIB
staticlib:unix {
QMAKE_CFLAGS += $$QMAKE_CFLAGS_STATIC_LIB
QMAKE_CXXFLAGS += $$QMAKE_CXXFLAGS_STATIC_LIB
}
defined(WINDOWS_TARGET_PLATFORM_VERSION, var):isEmpty(WINDOWS_TARGET_PLATFORM_MIN_VERSION) {
WINDOWS_TARGET_PLATFORM_MIN_VERSION = $$WINDOWS_TARGET_PLATFORM_VERSION
}
incredibuild_xge {
CONFIG -= incredibuild_xge
CONFIG = incredibuild_xge $$CONFIG
}
silent {
# Ensure that we process silent.prf last, as it will mangle QMAKE_CXX
# and friends in a way that some of the other features (sdk.prf and
# simd.prf eg) do not handle.
CONFIG -= silent
CONFIG = silent $$CONFIG
}
breakpad {
load(resolve_target)
DEBUGFILENAME = $$shell_quote($$system_path($$QMAKE_RESOLVED_TARGET))
PROJECTPATH = $$shell_quote($$system_path($$OUT_PWD))
!isEmpty(QMAKE_POST_LINK):QMAKE_POST_LINK = $$QMAKE_POST_LINK$$escape_expand(\\n\\t)
QMAKE_POST_LINK = $$QMAKE_POST_LINK$$quote($${QT_BREAKPAD_ROOT_PATH}$${QMAKE_DIR_SEP}qtbreakpadsymbols $$DEBUGFILENAME $$PROJECTPATH)
!isEmpty(QMAKE_STRIP):QMAKE_POST_LINK = $$QMAKE_POST_LINK$$escape_expand(\\n\\t)$$quote($$QMAKE_STRIP $$DEBUGFILENAME)
}
c++17: CONFIG += c++1z
c++20: CONFIG += c++2a
c++latest: CONFIG *= c++2b c++2a c++1z c++14 c++11
!c++1z:!c++2a:!c++2b {
# Qt requires C++17
QT_COMPILER_STDCXX_no_L = $$replace(QT_COMPILER_STDCXX, "L$", "")
!greaterThan(QT_COMPILER_STDCXX_no_L, 201402): CONFIG += c++1z
}
c++1z|c++2a|c++2b {
# Disable special compiler flags for host builds
!host_build|!cross_compile {
c++2b: cxxstd = CXX2B
else:c++2a: cxxstd = CXX2A
else: cxxstd = CXX1Z
} else {
# Fall back to c++17, because C++17 is required everywhere,
# including host builds
cxxstd = CXX1Z
}
# Check if we should disable compiler extensions or not
isEmpty(QMAKE_CXXFLAGS_GNU$$cxxstd) {
strict_c++: QMAKE_CXXFLAGS += $$QMAKE_CXXFLAGS_STRICTCXX
} else {
!strict_c++|isEmpty(QMAKE_CXXFLAGS_$$cxxstd): cxxstd = GNU$$cxxstd
}
QMAKE_CXXFLAGS += $$eval(QMAKE_CXXFLAGS_$$cxxstd)
QMAKE_LFLAGS += $$eval(QMAKE_LFLAGS_$$cxxstd)
unset(cxxstd)
}
c99|c11|c17|c18 {
c17|c18: cstd = C17
c11: cstd = C11
else: cstd = C99
!isEmpty(QMAKE_CFLAGS_GNU$$cstd) {
!strict_c|isEmpty(QMAKE_CFLAGS_$$cstd): cstd = GNU$$cstd
}
QMAKE_CFLAGS += $$eval(QMAKE_CFLAGS_$$cstd)
unset(cstd)
}
!no_utf8_source {
QMAKE_CFLAGS += $$QMAKE_CFLAGS_UTF8_SOURCE
QMAKE_CXXFLAGS += $$QMAKE_CFLAGS_UTF8_SOURCE
}
!precompile_header: SOURCES += $$NO_PCH_SOURCES