QtWebengine build error with opus and silk codecs

Kart

@SGaist
I have tried all these combinations

-mcpu=cortex-a9 -mfloat-abi=softfp -mfpu=vfp

-mcpu=cortex-a9 -mfloat-abi=softfp -mfpu=vfpv3-d16

-mtune=cortex-a9 -march=armv7-a -mhard-float -mfloat-abi=softfp 
-mfpu=vfpv3-d16

and i got the same error

libxxxx.a(yyyyy.o) uses VFP register arguments, libQt5WebEngineCore.so.5.9.1 does not

I tried the tegra2 mkspecs, but again another error.

ERROR at //build/config/android/internal_rules.gni:11:1: Assertion failed.
assert(is_android)
^-----
See //build/config/android/rules.gni:8:1: whence it was imported.
import("//build/config/android/internal_rules.gni")
^-------------------------------------------------
See //third_party/android_tools/BUILD.gn:5:1: whence it was imported.
import("//build/config/android/rules.gni")
^----------------------------------------
See //third_party/openmax_dl/dl/BUILD.gn:199:16: which caused the file to be included.
      deps = [ "//third_party/android_tools:cpu_features" ]
               ^-----------------------------------------
Project ERROR: GN run error!
Makefile:80: recipe for target 'sub-gn_run-pro-make_first' failed
make[3]: *** [sub-gn_run-pro-make_first] Error 3
make[3]: Leaving directory '/opt/qt/qt5.9.1arm_source/qt-everywhere-opensource-src-5.9.2/qtwebengine/src/core'
Makefile:77: recipe for target 'sub-core-make_first' failed
make[2]: *** [sub-core-make_first] Error 2
make[2]: Leaving directory '/opt/qt/qt5.9.1arm_source/qt-everywhere-opensource-src-5.9.2/qtwebengine/src'
Makefile:46: recipe for target 'sub-src-make_first' failed
make[1]: *** [sub-src-make_first] Error 2
make[1]: Leaving directory '/opt/qt/qt5.9.1arm_source/qt-everywhere-opensource-src-5.9.2/qtwebengine'
Makefile:834: recipe for target 'module-qtwebengine-make_first' failed
make: *** [module-qtwebengine-make_first] Error 2

SGaist

Might be a silly question but did you nuke properly the build folder between tries ?

Kart

@SGaist I am deleting the source folder and doing all the steps from the beginning each and everytime.

SGaist

Ok, so when you said you tried the Tegra2 mkspec, did you just use it or did you copy from it into yours like I suggested ?

Kart

@SGaist This is how i used it.

include(../common/linux_device_pre.conf)

QMAKE_INCDIR_POST      += $$[QT_SYSROOT]/usr/include

QMAKE_LIBDIR_POST      += $$[QT_SYSROOT]/usr/lib

QMAKE_RPATHLINKDIR_POST += $$[QT_SYSROOT]/usr/lib

QMAKE_CFLAGS           += -mtune=cortex-a9 -march=armv7-a -mhard-float -mfloat-abi=softfp -mfpu=vfpv3-d16
QMAKE_CXXFLAGS         += -mtune=cortex-a9 -march=armv7-a -mhard-float -mfloat-abi=softfp -mfpu=vfpv3-d16

include(../common/linux_arm_device_post.conf)

load(qt_config)

This is my qmake.conf.

Kart

Does anyone knows how ninja build in qtwebengine is getting these architecture values by default ?

-mfloat-abi=hard -mtune=generic-armv7-a -mfpu=vfpv3-d16 -mthumb

SGaist

From a quick look, somewhere around:

src/3rdparty/chromium/breakpad/src/build/common.gypi
src/3rdparty/chromium/build/config/compiler/BUILD.gn
src/3rdparty/chromium/build/common.gypi
src/3rdparty/chromium/native_client/build/standalone_flags.gypi
src/3rdparty/chromium/native_client/build/untrusted.gypi
./src/core/config/linux.pri:    MFLOAT = $$extractCFlag("-mfloat-abi=.*")

Kart

Thanks @SGaist. This file had some information. I am not sure with the syntax to make changes in this file.

./src/core/config/linux.pri:    MFLOAT = $$extractCFlag("-mfloat-abi=.*")

Whatever values I am giving to QMAKE_CFLAGS_RELEASE and QMAKE_CXXXFLAGS_RELEASE is not what GN build is taking.

Maybe if I figure out how to make changes in the file you have mentioned, I might be able to solve this issue.

Kart

In the file

qtwebengine/src/3rdparty/chromium/third_party/opus/BUILD.gn:     use_opus_rtcd = current_cpu == "arm" && (is_win || is_android || is_linux)

qtwebengine/src/3rdparty/chromium/third_party/opus/BUILD.gn: 
 if (use_opus_rtcd) {
      sources += [
        "$target_gen_dir/celt_pitch_xcorr_arm_gnu.S",
        "src/celt/arm/arm_celt_map.c",
        "src/celt/arm/armcpu.c",
        "src/celt/arm/armcpu.h",
        "src/celt/arm/celt_neon_intr.c",
        "src/celt/arm/fft_arm.h",
        "src/celt/arm/mdct_arm.h",
        "src/celt/arm/pitch_arm.h",
        "src/silk/arm/NSQ_neon.c",
        "src/silk/arm/NSQ_neon.h",
        "src/silk/arm/arm_silk_map.c",
      ]

As far as I understood if the CPU is based on ARM and the OS is linux use_opus_rtcd becomes TRUE. If it becomes true, qtwebengine/src/3rdparty/chromium/third_party/opus/src/celt/arm/armcpu.c decides whether it have the NEON capabilities. I am trying to see that changing armcpu.c to not to use NEON might work or not.

Torsten Krause

The chromium snapshot is outdated. There is already a fix for that!

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QtWebengine build error with opus and silk codecs