The export name is now ${TARGET_NAME}Entry. This can also be overridden
by using QT_WASM_EXPORT_NAME, both in CMake and qmake
Change-Id: I59c97ae6e22f0b2720716e9d7eff7b6b13d37ab5
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
Fixes error where Emscripten fails to find Qt library
dependencies at application link time.
Change-Id: I03b154f60ab5dc3a4c8d0d21d47551c9584029a2
Reviewed-by: Piotr Wierciński <piotr.wiercinski@qt.io>
Reviewed-by: Mikołaj Boc <Mikolaj.Boc@qt.io>
Recent Emscripten 3.1.27 reduces the stack size to 64KB,
which is way to small for Qt-based applications.
Restore the previous stack size (5 MB) by setting STACK_SIZE.
Change-Id: I6c25e31b32dc1d551fa423655fcef4891830bcd1
Reviewed-by: Piotr Wierciński <piotr.wiercinski@qt.io>
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
Make options for enabling "simd128" and "exceptions" public:
-feature-wasm-simd128
-feature-wasm-exceptions
Make sure both appear in the config summary and feature
list. Move the exceptions code so that they are next to
each other in the cmake file.
Pick-to: 6.5
Change-Id: I3975b56703f40f7ffff270754535bc2eb5bfe488
Reviewed-by: Mikołaj Boc <Mikolaj.Boc@qt.io>
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
This adds a new platform named wasm-emscripten-64
which sets the build and link argument -MEMORY64
You may see this warning, please ignore at your own discretion:
em++: warning: -sMEMORY64 is still experimental. Many features may not work.
[-Wexperimental]
Fixes: QTBUG-104891
Change-Id: I8d3150d239ba72dbef5c2352e0171d6cfbe51b59
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
Since a good number of tests use exec and friends, we want to use
asyncify for them. Asyncify is still possible to enable universally
with device options.
Change-Id: I0916f55328c98f2ba179cda3757eeee9d27f3e47
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
Add support for enabling -fwasm-exceptions at compile and
link time, which enables use of C++ exceptions.
Wasm-exceptions is an in-progress roadmap item (see
https://webassembly.org/roadmap/), but is supported
by the major browsers
Change-Id: I6e2847206a46ed8038320c99725bc09a0344d1b4
Reviewed-by: Aleksandr Reviakin <aleksandr.reviakin@qt.io>
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
Add Qt configure feature for enabling WebAssembly SIMD usage:
./configure ... -feature-wasm-simd128
Enabling this feature makes Qt add the -msimd128 flag to
the compile options, which enables SIMD instruction usage
for the compiler.
(This should not be confused with the previously added SSE
SIMD support, which uses Emscripten's support for translating
SSE SIMD to WASM SIMD)
Change-Id: I84a36ccef8abf9199c304d68ce371c6b1747b832
Reviewed-by: David Skoland <david.skoland@qt.io>
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
This spams the console with "writeStackCookie"/"checkStackCookie"
messages, which makes finding relevant debug output harder.
Pick-to: 6.4
Change-Id: I352b633f02f9ecc1333d1d91f5ffc21a4a937e53
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
Reviewed-by: Mikołaj Boc <Mikolaj.Boc@qt.io>
Suppress the pthreads-mem-growth warning for developer builds.
We (the Qt developers) are aware of the issue, so we don't
need the reminder.
Change-Id: Ib924a4dd87b8647d5f1052ab40c0ddf4b9f42108
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
The feature does not exist. Do not query for it and assume it's always
off for the purpose of WASM build.
Change-Id: I7e76242c9b3423bfe16872f668c60dae2e74fabe
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
This way it is able to pick up all of the properties assigned to it
before finalization.
Change-Id: I9da635f8620859a669c4e4d589fff56a3ce42ab9
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
Unify the settings for single-threaded and multi-threaded builds;
Qt now always enables heap growth by default.
This means we don't have to reserve a large (1GB) fixed memory
size, but can instead set the smaller (50 MB) initial memory size,
like the single-threaded build does.
Enabling threads + memory growth can potentially cause
a performance regression when accessing heap memory from
JavaScript (https://github.com/WebAssembly/design/issues/1271).
We leave it for the application to decide if this applies,
and if the switch to fixed memory should be made.
Change-Id: I96988b072506456685086e55aca4007a146bd70f
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
Reviewed-by: Mikołaj Boc <Mikolaj.Boc@qt.io>
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
This implements the build system bits required to build Qt
as as separate wasm modules a.k.a Emscripten side modules.
Enable by configuring with the "-shared" flag.
This is the first step towards shared library support and gets
us as far as being able to load QtCore and instantiate a
QCoreApplication.
Task-number: QTBUG-63925
Change-Id: Ib8f07f80fb5b13c8dbba65c7db735dc557b70d0e
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
Emscripten's option for enabling asyncify (-sASYNCIFY) is a link-time
option, which means there is no requirement to have a separate asyncify
build, at least for static builds.
Replace the current QT_HAVE_EMSCRIPTEN_ASYNCIFY compile-time option
with a run-time option which checks if the asyncify API is available.
Keep support for configuring with "-device-option QT_EMSCRIPTEN_ASYNCIFY=1"
for backwards compatibility and for the use case where want asyncify
support to be on by default for a given Qt build.
Enable asyncify for the asyncify_exec example.
Pick-to: 6.4
Change-Id: I301fd7e2d3c0367532c886f4e34b23e1093646ad
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Developers can add to Emscripten's EXPORT_RUNTIME_METHODS
by defining their own using:
QT_WASM_EXTRA_EXPORTED_METHODS
Which will add on to Qt's default exported runtime methods
of UTF16ToString,stringToUTF16
for cmake:
set_target_properties(<target> PROPERTIES QT_WASM_EXTRA_EXPORTED_METHODS "ccall,cwrap")
or
set(QT_WASM_EXTRA_EXPORTED_METHODS "ccall,cwrap")
for qmake:
QT_WASM_EXTRA_EXPORTED_METHODS = ccall,cwrap
Done-with: Mikolaj Boc
Fixes: QTBUG-104882
Pick-to: 6.4
Change-Id: I9678bdb7b077aaa8527057212ea4e161c0be0b60
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
CMakeLists.txt and .cmake files of significant size
(more than 2 lines according to our check in tst_license.pl)
now have the copyright and license header.
Existing copyright statements remain intact
Task-number: QTBUG-88621
Change-Id: I3b98cdc55ead806ec81ce09af9271f9b95af97fa
Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
Recents emsdk versions support specifying the method list without
using brackets. Switch to this syntax since that avoids any quoting issues.
Pick-to: 6.4
Change-Id: Ib7bf8ec3f0d2ef67e8222a23e7af9b368ee99a00
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
- USE_WEBGL2 is depreciated, Emscripten now uses MAX_WEBGL_VERSION
- Optimize and remove use of emulated ES2 and ES3, which means
only use WebGL friendly subset.
Users can add USE_ES3=1 and USE_ES2=1 to the final linker arguments
for those respective versions in order to enable using
glDrawArrays and glDrawElements with unbound buffers.
See https://emscripten.org/docs/porting/multimedia_and_graphics/OpenGL-support.html
Pick-to: 6.4
Change-Id: I11ae359966964b3e7aa6e61ccc714c2bfbf61f96
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
As of Emscripten 3.1.3, the --embind compiler argment has been
depreciated for -lembind
Change-Id: Iac5bc21602f27fda7c1ea6814a1c9525b9a5afab
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
Adding specialHTMLTargets to EXPORTED_RUNTIME_METHODS carries the
obligation to actually use it as well; failing to do so makes Emscripten
stop with a reference error on startup.
However, we can't guarantee that Qt will use it in all cases. The
current usage depends on QGuiApplication being used. Application code
could be using QCoreApplication, or no application object at all.
Detect if specialHTMLTargets is present instead, and then enable the code
paths which uses it if that's the case. This means that apps which want
to use e.g. multiple browser windows can opt into support by making sure
EXPORTED_RUNTIME_METHODS contains specialHTMLTargets.
Change-Id: I81105aa01946602fcf593f170e305d7dc9bad3be
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
JavaScripts's BigInt feature provides support for arbitrary-precision
integers. This makes it possible to represent 64-bit integers; the
standard JS Number type supports 32-bit integers only (or more
accurately 53-bit integers - see Number.MAX_SAFE_INTEGER).
Enable WASM_BIGINT which makes Emscripten map int64_t and uint64_t
to BigInt when interfacing with JavaScript code.
This removes one of the conditions which enables
wasm-emscripten-finalize.
Task-number: QTBUG-103352
Change-Id: Ia70d599daaf34c92695f5a2b61665e0c237e6b95
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
Reviewed-by: David Skoland <david.skoland@qt.io>
This removes one of the conditions which enables
wasm-emscripten-finalize.
Task-number: QTBUG-103352
Change-Id: Id05db4b081dec360cdad2e611622e5baf09aeb23
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Reviewed-by: David Skoland <david.skoland@qt.io>
The change
0ec75f4b99
missed adding specialHTMLTargets for qmake
Also add warning to keep QtWasmHelpers in sync with qmake.conf
Change-Id: Idb363e77f0cecb4f125d3cb4f7507899149a3bac
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
We need to add specialHTMLTargets to EXPORTED_RUNTIME_METHODS in order
to use it, as Emscripten does not export it.
Also, EM_ASM is not allowed for SIDE_MODULES, so it's better to use
emscripten::val methods.
Change-Id: I9b352ac98e2a961157f5bb36456bec3e35891270
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
This adds significant run-time overhead and should not be on by default.
Pick-to: 6.3
Change-Id: I33d312e31bd714f696d8acf2066eb4b285ff04af
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
This option completely ruins the output when running test, as it logs
every single safe heap operation. I don't think this detailed logging
is necessary or reasonable in a normal debug build.
Pick-to: 6.3
Change-Id: I4bb740299d631d21453f9b4a8959634801fb3a1e
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
This works on iOS and Android, and Windows with touchscreen.
On Android, we need to listen to the input event
of a hidden text element and synthesize Qt keyboard
events from that in order to get input events into Qt.
On Windows, we need to be more creative about bringing the native
virtual keyboard up.
Because the entire canvas is contenteditable, we need to specify the
inputmode is set to 'none', otherwise the v keyboard pops up
when user clicks anywhere on the canvas. Therefore we set a hidden
element as contenteditable, which pops up keyboard when Qt
needs it for editable widgets. On Android, this is the same
element that is used to proxy the keyboard input.
[ChangeLog][wasm] Add support for native mobile keyboard
Done-with: Morten Johan Sørvig <morten.sorvig@qt.io>
Fixes: QTBUG-83064
Fixes: QTBUG-88803
Change-Id: I769fe344fc10c17971bd1c0a603501040fe82653
Reviewed-by: David Skoland <david.skoland@qt.io>
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
Both INITIAL_MEMORY and PTHREAD_POOL_SIZE are settings users can
change, they are not interface settings.
Fixes: QTBUG-100693
Pick-to: 6.3 6.2
Change-Id: Ie1547c7f52c9fe109a313260616705728024b6b8
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>
Reviewed-by: David Skoland <david.skoland@qt.io>
Use “-pthreads” instead of “-s USE_PTHREADS=1”. This
is both a compile and linker option.
Pick-to: 6.3
Change-Id: Iaf7cb4ec41577fe596c3e81fda05c03fe0074c08
Reviewed-by: David Skoland <david.skoland@qt.io>
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
-g4 was deprecated in Emscripten 2.0.17, and since we are well past
that version we can safely use -gsource-map instead.
Change-Id: I497155619d6320661f6be0e220b52fa7d6ca0b8e
Reviewed-by: David Skoland <david.skoland@qt.io>
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
Not a compile option, and also added to the linker
options above.
Change-Id: Iab2107d4b5ee4bc73e85b3cd5070f1a96b3a5a3b
Reviewed-by: David Skoland <david.skoland@qt.io>
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
Some apps may need more initial memory when linking, emscripten will
fail with:
wasm-ld: error: initial memory too small
This increases the default initial memory form 16MB to 20MB.
Larger apps might still get this error, in which case
QT_WASM_INITIAL_MEMORY can be set.
Pick-to: 6.2
Fixes: QTBUG-97457
Change-Id: Icdc56c41fb3a3852a9a83f7a3dc15820e83e1148
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
Misc. fixes, including:
Fix a couple of typos in the JavaScript code. Also, macros-
within-macros don’t work, (without resorting to preprocessor
token pasting), so remove the debug output for now.
Limit the exec() “simulateInfiniteLoop” workaround to
top-level application exec() only. This way, asyncify
can be used for nested QEventLoop::exec() calls. (Emscripten
supports one level of suspend only, so we don’t want
to use that for the top-level exec(), but instead use it
for dialogs and such).
Use the new QEventLoop::ProcessEventsFlag::ApplicationExec
enum value to detect the exec() call type.
Change-Id: Ic702bfc31faf2e9f84ac5d3ccf43d067c5c61bf0
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
Emscripten complains that this variable is deprecated and should be
replaced with the one given in this patch.
Change-Id: Iafee06fcb1f292de25570545d74d7327679461b0
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
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>
Go with Emscripten’s default of not shutting down on
main() exit; this allows for writing main() in such
a way that avoids the exec() workaround.
Existing main() implementations (which do use the exec()
workaround) do not shut down Qt cleanly anyway, so we
gain little by shutting down the Emscripten runtime.
Applications can set this flag if they do want to shut
down on main() exit:
LFAGS += -s EXIT_RUNTIME=1
Change-Id: I52e1cc2bc907d1d2146822713e39b7610db3f95b
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
Make Emscripten generate a global constructor function
("createQtAppInstance()") instead of a global javascript
module object.
This enables more fine-grained control over module
instantiation; previously the module object would be
created when the runtime javascript was evaluated, and
the number of emscripten module/instances was limited
to one per page.
Set EXPORT_NAME to “createQtAppInstance” which avoids
collisions with other non-Qt Emscripten modules on
the same page. A further improvement would be to include
the app name in EXPORT_NAME, but this is not done at
this time.
Update the code in qtloader.js to call the constructor
function instead of working on a global module object.
The qtloader.js API is functional before the wasm and
Emscripten modules have been instantiated; store properties
and forward to the Emscripten module when it's created.
Change-Id: I12c49a5b9a4a932bbc46fcc5e5ecc453fd0fe7f0
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
new syntax rules for EXTRA_EXPORTED_RUNTIME_METHODS valid after 2.0.16
Pick-to: 6.2
Change-Id: Iff33e4c6f3176619fb35ec0994a7cc87b5d937c7
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
fix debugging demangler
Emscripten apparently does not like the quotes in the compiler argument
and remove array syntax
Change-Id: I66652f6bdc5872faf540a877ca01bf75dde47bbb
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
A few configure defines get changed:
QMAKE_WASM_PTHREAD_POOL_SIZE is now QT_WASM_PTHREAD_POOL_SIZE
QMAKE_WASM_TOTAL_MEMORY is now QT_WASM_INITIAL_MEMORY
QMAKE_WASM_SOURCE_MAP_BASE is now QT_WASM_SOURCE_MAP_BASE
device-option EMSCRIPTEN_ASYNCIFY=1 is QT_EMSCRIPTEN_ASYNCIFY=1
To create source maps for debugging. use
device-option QT_WASM_SOURCE_MAP=1
Task-number: QTBUG-78647
Change-Id: If9f30cd7fb408c386d6d69b5f7b1beecf1ab44b5
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
