bd0bb8b8f6
Since the bump to 1.5.3, the behavior of pkg-config has slightly
changed. Like it used to behave before this bump, a few paths (libdir,
includedir, etc.) are prefixed by the sysroot, and other paths are
not. However, the behavior changes when a path, such as dridriverdir,
is defined in terms of ${libdir}.
With the older pkg-config, dridriverdir was not sysroot-prefixed.
With the new pkg-config, it will be sysroot-prefixed, because
pkg-config really resolved the value of libdir, which is
sysroot-prefixed. dridriverdir is used on the target and not at build
time, so we don't want it to be sysroot-prefixed.
As reported by #11591, the xerver fail to load dri modules (r600_dri.so):
>From Xorg.0.log:
(EE) AIGLX error: dlopen of /full/path/to/sysroot/usr/lib/dri/r600_dri.so failed (/full/path/to/sysroot/usr/lib/dri/r600_dri.so: cannot open shared object file: No such file or directory)
(II) GLX: no usable GL providers found for screen 0
That's because the xserver hardcode the dri divers directory path in
DRI_DRIVER_PATH which come from
dridriverdir=`$PKG_CONFIG --variable=dridriverdir dri`
We can see in dri.pc that dridriverdir use libdir which is now prefixed
by the sysroot by pkgconf 1.5.3:
prefix=/usr
exec_prefix=/usr
libdir=${exec_prefix}/lib
includedir=${prefix}/include
dridriverdir=${libdir}/dri
Since we can't rely on pkgconf anymore, use
--with-dri-driverdir="/usr/lib/dri" to use explicitly "/usr/lib/dri"
instead of relying on dri.pc.
Tested using TestGlxinfo test from:
http://patchwork.ozlabs.org/patch/1021669/
Fixes:
https://bugs.buildroot.org/show_bug.cgi?id=11591
Signed-off-by: Romain Naour <romain.naour@gmail.com>
Cc: Bernd Kuhls <bernd.kuhls@t-online.de>
[Thomas: drop double quotes in path, rework commit log]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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