Qt5 Beta1 can be built for TI AM335x and Sitara platforms with some modifications. Changes include patching the Graphics SDK gl2.h header, configuring with OpenGL ES2, eglfs, linuxfb and NEON enabled, and removing a .pch include from the Makefile to avoid a compilation error. With these changes, Qt5 Beta1 can be successfully built and installed on the target filesystem.

1. Qt5 Beta1 on TI platforms
AM335x / Sitara/ Beaglebone/
Beagleboard platforms with SGX

2. Set up
• Pre-requisites for Qt5 build:
• - Qt5 Beta1 source package
http://releases.qt-project.org/qt5.0/beta1/
• - TI Graphics SDK (4.05 or later)
http://software-dl.ti.com/dsps/dsps_public_sw/sdo_sb/targetco
...
http://processors.wiki.ti.com/index.php/AM35x-
OMAP35x_Graphics_SDK_Getti...
- Recent filesystem (GCC 4.5 or later)
- ARM cross Toolchain (GCC 4.5 or later), example from
below:
http://people.linaro.org/~michaelh/incoming/binaries/

3. Changes
• Note: All source changes are available in
https://github.com/prabindh/qt-configs/tree/master/qt5_beta1
• Changes made:
Compared to Alpha, several changes are required in building
Beta1.
• - GLchar is undefined in current gl2.h header from Graphics SDK
package. Hence an updated gl2.h header is needed. Refer to
gl2.h.patch in source archive for this simple patch
• - Configuration needs to be done using the same steps as in Alpha
build. Patch for configure script is also provided in github archive
above.
• - After correct configuration, OpenGL (ES2), eglfs, linuxfb and
NEON should be enable in the configurations listed. Now the
package can be built.

4. Changes made
• - During compilation of neon.S files, compilation error occurs due to
inclusion of PCH files that are not available
• arm-linux-gnueabi-gcc -c -include .pch/release-shared/QtGui <... >
-o .obj/release-shared/pixman-arm-neon-
asm.o ../3rdparty/pixman/pixman-arm-neon-asm.S
cc1: fatal error: .pch/release-shared/QtGui: No such file or directory
compilation terminated.
make[2]: *** [.obj/release-shared/pixman-arm-neon-asm.o] Error 1
• To avoid this, reference to QtGui can be removed from the
src/gui/Makefile itself as a temporary measure (changes will be
overwritten on a rebuild), or configure needs to be done with "-no-
pch" option.
• Search for ".obj/release-shared/pixman-arm-neon-asm.o:" in
src/gui/Makefile
Remove this "-include .pch/release-shared/QtGui"
• - Once successfully built, Qt5 Beta1 can be installed to target
filesystem as described in http://www.gpupowered.org/node/14