mesa: minor tweaks

extra/mesa/build

@@ -22,13 +22,12 @@
 
     cd -; cd ..
 }
-
 export PYTHONPATH
-export CFLAGS="$CFLAGS -DGLX_X86_READONLY_TEXT"
 
 # Fix issues with musl and firefox.
 # https://bugs.freedesktop.org/show_bug.cgi?id=35268
 # https://github.com/mesa3d/mesa/commit/9f37c9903b87f86a533bfaffa72f0ecb285b02b2
+# https://gitlab.freedesktop.org/mesa/mesa/-/issues/966
 sed "/pre_args += '-DUSE_ELF_TLS'/d" meson.build > _
 mv -f _ meson.build
 
@@ -43,6 +42,7 @@ meson \
     --mandir=/usr/share/man \
     --localstatedir=/var \
     --buildtype=release \
+    -Dglx-read-only-text=true \
     -Dplatforms=wayland \
     -Dglx=disabled \
     -Degl=enabled \