Package global data in COMDAT sections for optimization.
According to the docs, this can significantly reduce the
size of the resulting binary executable.
I've tested build Qt with /Gw locally with and without
LTCG, the result shows /Gw can reduce the binary size
indeed, but not "significantly". The result also reveals
that exes can benefit much more from /Gw than dlls.
The result can be seen from the QTBUG-98894 bug report.
Microsoft Docs:
https://docs.microsoft.com/en-us/cpp/build/reference/gw-optimize-global-data?view=msvc-170
Task-number: QTBUG-98894
Change-Id: Ibce34c98e791e519d669a5fe39c0027d1459c382
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Kai Koehne <kai.koehne@qt.io>
Large address aware is enabled by default in 64-bit
compilers, but not 32-bit compilers. But Qt users
may build 32-bit Qt themself, in this case large
address aware is disabled in fact, and it may cause
some issues. So we pass /LARGEADDRESSAWARE to the
linker unconditionally to make sure large address
aware is enabled for both 32-bit and 64-bit builds.
Microsoft Docs:
https://docs.microsoft.com/en-us/cpp/build/reference/largeaddressaware-handle-large-addresses?view=msvc-170
Change-Id: Idb2603d9ba0ba9ef4477ce1c3174b7c7e8ba76f6
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
The constructor from a raw pointer should be
1) constexpr,
2) explicit, and
3) *private*.
We can do 1) without too much trouble.
2) is a (easy to fix) SIC in case of implicit conversions accidentally
relied upon from somewhere.
3) cannot be "easily" fixed by user code (they have to refactor), and
also, it's a BIC on Windows which encodes class members' access in
symbols. Someone may have been exporting some QList subclass, in turn
exporting the iterator classes, and therefore that someone now has the
constructors' symbols with a given access.
So, don't do 2+3 _just yet_ for user code, but set a deadline: Qt 6.5 is
the last that will support this. On Qt 6.6, we switch. All of this on
non-Windows, againt to avoid an ABI break. One can opt-in at any time
via a suitable define.
Given we have this define, use it to guard the other way around as well:
conversions from an iterator to a raw pointer should never be explicit
(there's std::to_address for this).
[ChangeLog][QtCore][QList] Converting a QList's iterator from and to a
raw pointer is deprecated, and will get removed in Qt 6.6. User code can
prepare for the change by defining QT_STRICT_QLIST_ITERATORS.
Change-Id: I0f34bfa3ac055c02af5a3ca159180304660dfc11
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This hasn't worked for some time. It's not in our CI and I don't think
it was working at all. When I tried to build it, I ran into several
problems with C++17 and an Internal Compiler Error I did not have any
interest in working around.
After discussing with the Intel compiler team, it was decided that
fixing those issues in the old compiler is not going to happen. Instead,
their recommendation is to adopt the new LLVM-based compiler, which
the last commit added support for.
This commit does not remove qmake support for the old ICC. It's possible
someone is using qmake with a non-Qt6 project and ICC.
Change-Id: Icb2516126f674e7b8bb3fffd16ad6350ddbd49e5
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
This includes a few cleanups to our .cmake files where it was easier to
combine existing sections of Clang / AppleClang that no longer needed to
be distinct.
icpx could be replaced with a shell script:
exec `basename $0`/clang++ --intel "$@"
tst_qnumeric is not passing
FAIL! : tst_QNumeric::classifyF() Compared values are not the same
Actual (qFpClassify(tiny / two)): 2
Expected (FP_SUBNORMAL) : 3
Loc: [/home/tjmaciei/src/qt/qt6-icx/qtbase/tests/auto/corelib/global/qnumeric/tst_qnumeric.cpp(344)]
FAIL! : tst_QNumeric::classifyD() Compared values are not the same
Actual (qFpClassify(tiny / two)): 2
Expected (FP_SUBNORMAL) : 3
Loc: [/home/tjmaciei/src/qt/qt6-icx/qtbase/tests/auto/corelib/global/qnumeric/tst_qnumeric.cpp(344)]
FAIL! : tst_QNumeric::floatDistance(denormal) Compared values are not the same
Actual (qFloatDistance(from, stop)): 0
Expected (expectedDistance) : 4194304
Loc: [/home/tjmaciei/src/qt/qt6-icx/qtbase/tests/auto/corelib/global/qnumeric/tst_qnumeric.cpp(408)]
FAIL! : tst_QNumeric::doubleDistance(denormal) Compared values are not the same
Actual (qFloatDistance(from, stop)): 0
Expected (expectedDistance) : 2251799813685248
Loc: [/home/tjmaciei/src/qt/qt6-icx/qtbase/tests/auto/corelib/global/qnumeric/tst_qnumeric.cpp(408)]
P
Change-Id: Icb2516126f674e7b8bb3fffd16ad59431e8c3379
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
This define used to be set for the entirety of the Qt build but
was lost during the qmake->CMake transition. Re-enable it.
Change-Id: Idc4cb6ada485158559485b60f62f76439550b255
Pick-to: 6.2
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Emscripten only supports
SSE1, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, and 128-bit AVX instruction
sets at this time.
https://emscripten.org/docs/porting/simd.html
Browsers might need to enable simd support in the advanced
configurations
about: config or chrome:flags
Enable by configuring Qt with -sse2
Pick-to: 6.2
Fixes: QTBUG-63924
Change-Id: Ifeafae20e199dee0d19689802ad20fd0bd424ca7
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
This reverts commit 64c111e10f.
The claim of the commit message, that we cannot use the gold linker,
does not seem to be true (anymore?). This is underlined by the fact
that CMake *forces* the gold linker for Android, whenever LTCG is
enabled (see Modules/Compiler/Clang.cmake as of CMake 3.21.1).
Change-Id: I90edac8555be4abdd44cd367228aeffb0d66b895
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Both the compiler and linker -fapplication-extension flag should only
be applied when building Qt's libraries (not executables).
It's up to the user project whether their code will be restricted with
application-extension-only APIs.
In qmake that can be achieved by adding to the qmake project
CONFIG += app_extension_api_only
In CMake it can be achieved by either adding the compiler and link flags
in the project directly (using target_X_options) or by setting the
appropriate setting in the Xcode project when using the Xcode
generator.
Amends e189126f1a
Pick-to: 6.2
Task-number: QTBUG-95199
Change-Id: Ie7a764d460a89c7650391abff0fcc5abfcabef64
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
We shouldn't force add the bitcode linker flags to user projects.
And we don't link anything when building Qt for iOS itself, we only
archive object files into static libraries.
The final decision whether bitcode should be used is up to the Xcode
project. That is controlled by Xcode's ENABLE_BITCODE option.
Bitcode compile flags are still added when building Qt itself.
Amends a046833176
Pick-to: 6.1 6.2
Task-number: QTBUG-95199
Change-Id: I04c77f659b82269bb8010ea262b2e51f36e9def3
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
Also remove handling of older versions, because we only support
Visual Studio 2019 currently
Pick-to: 6.2
Change-Id: If66a46d970047fe25582e323df74e0a904ee92da
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
There's a number of upstream bugs that cause false positives;
do not make them errors.
Change-Id: I4151794d8d37177a47a34aef8d83accf4377d44a
Pick-to: 6.1 6.2
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
GCC 11.1 has a bug [1] in the preprocessor that leads to
-Wsuggest-override warnings being raised in random places, even under
pragmas that are supposed to suppress it. For some reason, NOT using the
integrated preprocessor fixes it, so add that flag as a workaround.
Also, GCC 11 introduces a family of warnings for C++20's deprecations of
mixed enum arithmetic, which we use all over the place. Avoid a hard
error for those warnings.
[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100796
Change-Id: I3b2aefa385f191f207e7eb876bc1ed0b18fb342b
Pick-to: 6.1 6.2
Task-number: QTBUG-93360
Task-number: QTBUG-94059
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
After discussion we decided to opt-out the UNICODE definintion
behavior. To disable UNICODE in user projects the
qt6_disable_unicode_defines function could be used.
Amends 5b64e5950c
[ChangeLog][CMake] Enables the UNICODE and _UNICODE definitions on
WIN32 platforms by default for all cmake projects to reflect the
qmake behavior. Use qt6_disable_unicode_defines function to disable
the default unicode definitions.
Pick-to: 6.1
Fixes: QTBUG-93895
Change-Id: Id70ff7dcf8c74f660ec851f8b950e1e3b94d9fb4
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
It's needed in qtconnectivity, but currently the
qt_disable_apple_app_extension_api_only function is defined in
QtInternalTargets.cmake which is loaded only in qtbase.
Move the function to cmake/QtTargetHelpers.cmake.
Amends e189126f1a
Pick-to: 6.1
Change-Id: Ia2470e48a91385239394368780f5bbb223000113
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
In commit 013abe3206, I add
_CRT_SECURE_NO_WARNINGS definition for all Qt internal module targets,
to suppress MSVC warnings like:
warning C4996: 'strncpy': This function or variable may be unsafe.
However, when compiling some internal tools, such as qmake and qdoc,
such warnings also exist. To suppress this kind of warning entirely,
_CRT_SECURE_NO_WARNINGS definition should be added for all Qt internal
targets when using MSVC compiler.
Pick-to: 6.1
Change-Id: I9c37b20672f9d0f470e3e9ea847e5221f43bfc04
Reviewed-by: Yuhang Zhao <2546789017@qq.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
In particular that influences BundledLibrary targets.
Most internal targets already depended transitively on Qt::Platform
via Qt::Core as a public dependency. This was not the case for
BundledLibrary targets which don't link to Qt::Core.
This led to compilation issues in user projects when targeting
WebAssembly, due to mismatched flags between a bundled Harfbuzz vs
a user project. Probably other subtle issues as well (e.g. none of the
Windows specific compile definitions were passed to bundled libs).
Bundled libraries depend on PlatformCommonInternal already, so make
PlatformCommonInternal turn depend on the public Platform target.
I thought that was already the case, but we merely relied on the
Qt::Core dependency.
Note that Qt::Core should still list Platform as a public dependency,
so it gets propagated to user projects.
Amends acf9b3a68b
Change-Id: Ida3b219818f89ec6eba2c2d92c5db65ad56bc5a4
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
Add '_WINDLL' definition for the MSVC compilers family.
Check the 'FEATURE_optimize_size' value before replacing compiler flags
in the qt_internal_add_optimize_full_flags function. This is required,
because Qt::Core and Qt::Gui modules lost their ability to shrink,
when selecting the appropriate build type or features.
Fixes: QTBUG-89952
Change-Id: I982c25ea84e4793b4006ead0ee516b3f3eb2a054
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
Move UNICODE and _UNICODE definitions from the public Qt::Platform
target to the private Qt::PlatformCommonInternal target.
Fixes: QTBUG-89951
Change-Id: Ib4c1c4cab74acda0a43c4ddb3cffd3954393dc89
Reviewed-by: Kai Koehne <kai.koehne@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
According to Microsoft's docs, /OPT:ICF is enabled by the
linker by default unless /OPT:NOICF or /DEBUG is specified.
If we are in RelWithDebInfo mode, /DEBUG is passed to the
linker to generate debug symbols, however, it caused the
identical COMDAT folding be disabled. We now pass /OPT:ICF
to the linker explicitly to prevent this.
[1] https://docs.microsoft.com/en-us/cpp/build/reference/opt-optimizations?view=msvc-160
Change-Id: I02099edb81034ace7bb19f1164d57829e3979a5f
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
This matches how it is in the qmake mkspec, silencing a lot of
warnings - but contrary to when building with qmake, it's only
applied when building Qt itself. For external projects built with
cmake, the Qt headers are included with -isystem, which silences any
warnings from those headers.
Change-Id: I1a498d3c2715cb73e647668cb7226ceeffb7ff0b
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
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>
We want this in order to be able to export constexpr members.
Change-Id: I33ba7964ebee54fe656df983985d8d6fa0b99358
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
win32-clang-g++/qmake.conf did define
QMAKE_CFLAGS_WARN_ON += -Wextra -Wno-ignored-attributes
probably for the same reason.
Change-Id: I14b66f2555949c03a2ea996923e31f5ec9f7105a
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
In qmake it's done for all qmake projects, in CMake we lean on the
safe side and apply it to building Qt itself. User CMake projects can
then choose to add it themselves.
Task-number: QTBUG-85992
Change-Id: I51919f947d43ffd9925e3d2837dcad17e480367d
Reviewed-by: Cristian Adam <cristian.adam@qt.io>
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Introduce new CMake variables and map
-D to QT_EXTRA_DEFINES,
-I to QT_EXTRA_INCLUDEPATHS,
-L to QT_EXTRA_LIBDIRS,
and -F to QT_EXTRA_FRAMEWORKPATHS.
Those variables only affect the Qt build, not user projects.
Fixes: QTBUG-85878
Change-Id: I229df2eed1505a2619068d0d32975962b052569a
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
Most of the time lld just gets stuck (deadlock) waiting on some
mutex, thus failing integrations.
Amends 64c111e10f
Task-number: QTBUG-85911
Change-Id: Id73bf967a7aeb0e0cbccfaafe056b325c8711f82
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Cristian Adam <cristian.adam@qt.io>
This new function is meant to be used where load(qt_app) is used.
It delegates functionality to qt_add_executable, while handling
some additional behavior via a finalization function (mostly handling
of macOS Info.plist files and icons, as well as Windows icons and
resource files)
It uses a new PlatformAppInternal interface target.
Task-number: QTBUG-85757
Change-Id: I1a2d5851b137fcd4a6323e0e06fb154f91619800
Reviewed-by: Cristian Adam <cristian.adam@qt.io>
gcc doesn't report warnings for final methods since version 9.2:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78010
Change-Id: I7152351aac0e3bad86d777e119f25137ef97ec6f
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Kai Koehne <kai.koehne@qt.io>
Apple deprecated the entire OpenGL API in favor of Metal, which
we are aware of, so we don't need to see the warnings when building
Qt.
Instead of applying the silencing globally for all Qt consumers,
both internal and external, we now limit the silencing to Qt itself.
That means user code that explicitly uses any of the deprecated APIs
will see the warnings. Note that this does not apply to merely using
any of the Qt OpenGL APIs. The user has to explicitly use the platform
APIs that have been deprecated.
The warnings need to be disabled on a build system level, so that
that they are passed as -D flags on the command line. If the defines
were done in Qt headers (qguiglobal.h e.g.), they would require the
user to always include this header before any of the Apple headers.
Change-Id: I3f2a2a5211332a059ad4416394251772c677fdcb
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
Building an iOS app with qmake failed because Qt itself was not built
with bitcode enabled.
Enable building with bitcode.
Make sure qrc resource files and bundled 3rd party libraries also
build with the regular Qt module flags and thus with bitcode enabled.
As a consequence gc_sections has to be disabled for UIKIT platforms.
Task-number: QTBUG-82581
Task-number: QTBUG-84781
Task-number: QTBUG-85240
Change-Id: I15fe668725a139c02f2a32a5db849b46d4ce325c
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
In qmake land the define is set in mkspecs/common/macx.conf which
means it should be public for all Qt consumer apps as well, not just
internal targets. Make it so.
Amends 17be43c58e
Task-number: QTBUG-83929
Change-Id: I9f9d7dfca24b54977cb8364723c3618d3fec2e73
Reviewed-by: Cristian Adam <cristian.adam@qt.io>
The large file flags in qmake land are set in the
mkspecs/features/unix/largefile.prf file, which is loaded by qmake
when a CONFIG += largefile entry is written by configure into
qmodule.pri.
This essentially makes them global flags for all private Qt targets
because qmodule.pri is a global file loaded load(qt_build_config)
Thus assign the flags onto the PlatformCommonInternal target instead
of the PlatformModuleInternal one.
One peculiarity though is that in qmake land these flags are also
applied when building examples as part of the main Qt build. This
is because qt_build_config loads qmodule.pri even for an example,
because qmake sees it as part of the overall Qt build.
The flags are not applied by qmake if the example is built in
a different standalone build dir not part of the Qt buil dir.
We don't do that in the CMake build, and thus examples will never
have those flags.
Task-number: QTBUG-83929
Change-Id: If653a669b4835aadd1de84acb477c375ab523909
Reviewed-by: Cristian Adam <cristian.adam@qt.io>
Needed to avoid linker warnings transformed into errors, when linking
QtWebEngine with qmake mixing.
ld: warning: linking against a dylib which is not safe for use in
application extensions:
The flag is added to libraries and plugins, unless opted out.
CMake equivalent of 944110089d
Task-number: QTBUG-83929
Task-number: QTBUG-75666
Change-Id: I3e9acca4712c9a266bf54c6e35e2fd2c0096692b
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
And enable the same default when building Qt itself (it's implicit).
Allow opting out on a target-by-target basis, by using the public
qt_disable_utf8_sources() API call.
Change-Id: Ifc19a744d57b96b1c74a6926a0c6628c2a820464
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
Otherwise when applied to bundled 3rd party library C files,
the MinGW build fails when compiling src/3rdparty/md4c/md4c.c.
Change-Id: Ia522b10aa69aa15f239d20c65e31c84edbccee6d
Reviewed-by: Simon Hausmann <hausmann@gmail.com>
Enable sse2 and fpmath for modules when appropriate, the logic
is a port of the code in mkspecs/features/qt_module.prf.
Fix qdrawhelper.cpp to always be compiled when using GCC with a
special case. pro2cmake.py failed to handle the source subtraction
correctly.
Fixes: QTBUG-83791
Task-number: QTBUG-75578
Change-Id: Ibe32a250b266d580ad21f6c55f09fd03a14ceb82
Reviewed-by: Simon Hausmann <hausmann@gmail.com>
Add -Wno-error=format-overflow. This is similar to what is done in
qt_common.prf, however we don't turn the warning off completely.
For now at least.
Change-Id: I93c20064759dea43309c3a17de4d733ede9ca2cb
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
