Hi,

I’m trying to cross-compile latest webkit with Qt 4.8.1 and Qt5.0 alpha.
There is a cross-compiling error in "TextureMapperGL.cpp" on building with Qt 
4.8.1, not appearing on building with Qt 5.0 alpha.

Here is the details:
================================================================
WebKit revision:   r114348
WebKit port:       Qt
Qt version:        4.8.1 for Linux/X11, download from 
http://qt.nokia.com/downloads/linux-x11-cpp
================================================================
Host OS:           Ubuntu 11.10 amd64
Host Platform:     Desktop PC (Intel(R) Q8400)
Target OS:         Ubuntu 11.10 armel
Target Platform:   Pandaboard (OMAP4430, ARMv7 Processor rev 2)
Toolchain:         arm-linux-gnueabi-gcc (crosstool-NG linaro-1.13.1+bzr - 
Linaro GCC 2012.03) 4.6.3
================================================================
Qt configuration from qconfig.pri:

CONFIG +=  def_files_disabled exceptions no_mocdepend release stl 
qt_no_framework
QT_ARCH = arm
QT_EDITION = OpenSource
QT_CONFIG +=  minimal-config small-config medium-config large-config 
full-config phonon phonon-backend accessibility egl openvg opengl opengles2 
reduce_exports ipv6 clock-gettime clock-monotonic mremap getaddrinfo ipv6ifname 
getifaddrs inotify png system-freetype zlib nis cups iconv glib gstreamer dbus 
openssl x11sm xshape xvideo xsync xrender mitshm fontconfig xkb alsa pulseaudio 
icu concurrent xmlpatterns multimedia audio-backend svg script scripttools 
declarative release
================================================================
Webkit command invoked:

webkit_git/Tools/Scripts/build-webkit --qt --release --makeargs="-j5" 
--no-3d-canvas --media-statistics
================================================================
The output of error:

In file included from 
/home/work/board_sync/rootfs_panda_ubuntu_1110/usr/include/GL/glx.h:45:0,
                 from 
/home/work/opensource/webkit/source/webkit_git/Source/WebCore/platform/graphics/texmap/TextureMapperGL.cpp:43:
/home/work/board_sync/rootfs_panda_ubuntu_1110/usr/include/GL/gl.h:168:17: 
error: conflicting declaration ‘typedef double GLdouble’
/home/work/board_sync/Trolltech/Qt4/Qt-4.8.1/include/QtOpenGL/qgl.h:85:17: 
error: ‘GLdouble’ has a previous declaration as ‘typedef GLfloat GLdouble’
/home/work/board_sync/rootfs_panda_ubuntu_1110/usr/include/GL/gl.h:1667:23: 
error: expected type-specifier before ‘glBlendEquation’
/home/work/board_sync/rootfs_panda_ubuntu_1110/usr/include/GL/gl.h:1667:23: 
error: expected initializer before ‘glBlendEquation’
/home/work/board_sync/rootfs_panda_ubuntu_1110/usr/include/GL/gl.h:1669:23: 
error: expected type-specifier before ‘glBlendColor’
/home/work/board_sync/rootfs_panda_ubuntu_1110/usr/include/GL/gl.h:1669:23: 
error: expected initializer before ‘glBlendColor’
/home/work/board_sync/rootfs_panda_ubuntu_1110/usr/include/GL/gl.h:1859:23: 
error: expected type-specifier before ‘glActiveTexture’
/home/work/board_sync/rootfs_panda_ubuntu_1110/usr/include/GL/gl.h:1859:23: 
error: expected initializer before ‘glActiveTexture’
/home/work/board_sync/rootfs_panda_ubuntu_1110/usr/include/GL/gl.h:1950:23: 
error: expected type-specifier before ‘glSampleCoverage’
/home/work/board_sync/rootfs_panda_ubuntu_1110/usr/include/GL/gl.h:1950:23: 
error: expected initializer before ‘glSampleCoverage’
In file included from 
/home/work/board_sync/rootfs_panda_ubuntu_1110/usr/include/GL/gl.h:2091:0,
                 from 
/home/work/board_sync/rootfs_panda_ubuntu_1110/usr/include/GL/glx.h:45,
                 from 
/home/work/opensource/webkit/source/webkit_git/Source/WebCore/platform/graphics/texmap/TextureMapperGL.cpp:43:
/home/work/board_sync/rootfs_panda_ubuntu_1110/usr/include/GL/glext.h:5072:19: 
error: conflicting declaration ‘typedef ptrdiff_t GLintptr’
/home/work/board_sync/rootfs_panda_ubuntu_1110/usr/include/GLES2/gl2.h:38:26: 
error: ‘GLintptr’ has a previous declaration as ‘typedef khronos_intptr_t 
GLintptr’
/home/work/board_sync/rootfs_panda_ubuntu_1110/usr/include/GL/glext.h:5073:19: 
error: conflicting declaration ‘typedef ptrdiff_t GLsizeiptr’
/home/work/board_sync/rootfs_panda_ubuntu_1110/usr/include/GLES2/gl2.h:39:26: 
error: ‘GLsizeiptr’ has a previous declaration as ‘typedef khronos_ssize_t 
GLsizeiptr’
make[3]: *** [obj/release/TextureMapperGL.o] Error 1
make[3]: *** Waiting for unfinished jobs....
make[3]: Leaving directory 
`/home/work/board_sync/rootfs_panda_ubuntu_1110/home/work/board_sync/WebKit/WebKit-114348_Qt-4.8.1/Release/Source/WebCore'
make[2]: *** [sub-Target-pri-make_default-ordered] Error 2
make[2]: Leaving directory 
`/home/work/board_sync/rootfs_panda_ubuntu_1110/home/work/board_sync/WebKit/WebKit-114348_Qt-4.8.1/Release/Source/WebCore'
make[1]: *** [sub-Source-WebCore-WebCore-pro-make_default-ordered] Error 2
make[1]: Leaving directory 
`/home/work/board_sync/rootfs_panda_ubuntu_1110/home/work/board_sync/WebKit/WebKit-114348_Qt-4.8.1/Release'
make: *** [incremental] Error 2
================================================================
GCC command invoked could be found in attachment of 
https://bugs.webkit.org/show_bug.cgi?id=84321

================================================================

Because this error doesn't appear on building with Qt 5.0 alpha, I'm not sure 
whether the latest WebKit could support Qt 4.8.
Or did TextureMapperGL not support Qt4.8 on OpenGL ES2 platform?

Anyone could help it?

PS: I have filed a Bug 84321 on WebKit Bugzilla 
(https://bugs.webkit.org/show_bug.cgi?id=84321).

Best Regards,
Fang Bao


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