Re: Can't comple qemu-system-aarch64 with egl-headless display

[Mike Ladouceur]

That was indeed the problem. Installing libgbme-dev solved the problem and will 
be remembered for the next time

Sent from my iPhone

> On Sep 5, 2021, at 11:08 AM, Peter Maydell <peter.maydell@linaro.org> wrote:
> 
> On Sun, 5 Sept 2021 at 16:01, Mike Ladouceur <mike.ladouceur@live.com> wrote:
>> 
>> # This runs fine
>> ./configure --enable-kvm --enable-system --enable-spice --enable-opengl 
>> --enable-virglrenderer --enable-libusb --target-list=aarch64-softmmu
>> 
>> # Make runs. with no errors
>> 
>> # No egl-headless here
>> $ qemu-system-aarch64 -display ?
>> Available display backend types:
>> none
>> gtk
>> sdl
>> curses
>> spice-app
>> 
>> # I guess this would be expected if the egl-headless isn't listed above.
>> $ qemu-system-aarch64 -display egl-headless
>> qemu-system-aarch64: -display egl-headless: Invalid parameter 'egl-headless'
> 
> Hmm, so it built OK but didn't compile in the EGL support.
> Which QEMU version are you using?
> 
> Looking at the configure/meson logic, I think that the problem here
> is that egl-headless depends on two things: opengl and gbm. configure
> provides an --enable-opengl to force configure to fail if it doesn't
> find the opengl libraries, but there is no equivalent --enable-gbm
> to force a failure, so if libgbm isn't present then the build system
> always just falls back to "don't build the features that depend on it".
> 
> On Ubuntu I think what you want is in the 'libgbm-dev' package; try
> installing that and then rerunning configure and make.
> 
> thanks
> -- PMM