[yocto] [meta-qt5][meta-raspberrypi]: Qt5 with EGL support for the Raspberry through linux-oe-g++

[Andrei Gherzan]

On Tue, Apr 19, 2016 at 10:46:11AM +0200, Julien Gueytat wrote:
> Hi,
>
> I still can't figure out the patch to apply in meta-qt5 to get EGL support
> with the Raspberry.
>
> The test to check EGL does not pass and fails with the following command:
>
> arm-poky-linux-gnueabi-g++  -march=armv7-a -marm  -mthumb-interwork
> -mfloat-abi=hard -mfpu=neon-vfpv4 -mtune=cortex-a7 --sysroot=/home/jgueytat/projects/LightPixels/poky/build/tmp/sysroots/lightpixels
> -Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed -Wl,-O1 -o egl egl.o -lGLESv2
> -lbcm_host -lvchostif -lvcos -lvchiq_arm -pthread -lEGL
>
>
> Here is the content of the file egl.pro:
>
> $ cat egl.pro
> SOURCES = egl.cpp
>
> for(p, QMAKE_LIBDIR_EGL) {
>     exists($$p):LIBS += -L$$p
> }
>
> message("In egl.pro - 1: QMAKE_LIBS_EGL = $$QMAKE_LIBS_EGL")
> message("In egl.pro - 1: LIBS = $$LIBS")
>
> !isEmpty(QMAKE_INCDIR_EGL): INCLUDEPATH += $$QMAKE_INCDIR_EGL
> !isEmpty(QMAKE_LIBS_EGL): LIBS += $$QMAKE_LIBS_EGL
>
> message("In egl.pro - 2: QMAKE_LIBS_EGL = $$QMAKE_LIBS_EGL")
> message("In egl.pro - 2: LIBS = $$LIBS")
>
> CONFIG -= qt
>
> In the main ./configure file of qtbase:
>
> | In configure #1: QMAKE_LIBS_EGL =
> | In configure #2: QMAKE_LIBS_EGL = -lEGL -lGLESv2 -lbcm_host -lvchostif
> -lbcm_host -lvcos -lvchiq_arm -pthread
>
> The variable QMAKE_LIBS_EGL is set properly.
>
>
> In the ./config.tests/qpa/egl/egl.pro file:
>
> | Project MESSAGE: In egl.pro - 1: QMAKE_LIBS_EGL = -lEGL
> | Project MESSAGE: In egl.pro - 1: LIBS = -lEGL -lGLESv2 -lbcm_host
> -lvchostif -lvcos -lvchiq_arm -pthread
> | Project MESSAGE: In egl.pro - 2: QMAKE_LIBS_EGL = -lEGL
> | Project MESSAGE: In egl.pro - 2: LIBS = -lEGL -lGLESv2 -lbcm_host
> -lvchostif -lvcos -lvchiq_arm -pthread -lEGL
>
>
> *What I see is that:*
> In the configure file the variable QMAKE_LIBS_EGL is properly set through
> pkg-config.
> In the egl.pro file... The variable LIBS gets the content of QMAKE_LIBS_EGL
> and the variable QMAKE_LIBS_EGL gets back to its default -lEGL.
>
> In the end with have -lGLESv2 before -lEGL and this does not link.
>
> I checked also the content of .qmake.vars:
> grep QMAKE_LIBS_EGL .qmake.vars
> QMAKE_LIBS_EGL = -lEGL -lGLESv2 -lbcm_host -lvchostif -lbcm_host -lvcos
> -lvchiq_arm -pthread
>
>
> The command QMakeVar set QMAKE_LIBS_EGL "$QMAKE_LIBS_EGL" seems to have his
> job done too late...
>
> If someone has an idea to get the proper correction done...
>
> Best Regards,
> Julien
>

> --
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Merged to master. Thanks.

--
Andrei Gherzan
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