GCC 14 newly by default treats as errors a number of situations which
before were only warnings.  For more information see
https://gcc.gnu.org/gcc-14/porting_to.html and meta bug #1220571.

Because of this, package xf86-video-nouveau fails to compile.  This can be seen
online
at:
https://build.opensuse.org/package/live_build_log/openSUSE:Factory:Staging:Gcc7/xf86-video-nouveau/standard/x86_64

It can be reproduced locally with command: osc build --clean
--alternative-project home:rguenther:nextgcc

There's a Gentoo bug which might be relevant:
https://bugs.gentoo.org/885763


The (first) error (that halts the build) is:

[   15s] nv_driver.c: In function 'NVScreenInit':
[   15s] nv_driver.c:1451:23: error: implicit declaration of function
'wfbScreenInit'; did you mean 'fbScreenInit'? [-Wimplicit-function-declaration]
[   15s]  1451 |                 ret = wfbScreenInit(pScreen, FBStart,
pScrn->virtualX,