I'm installing GTK+3 with Wayland support so no X USE flag. Since this commit: https://gitlab.freedesktop.org/mesa/mesa/-/commit/6202a13b71e18dc31ba7e2f4ea915b67eacc1ddb GTK3+ should be built against mesa with `-DEGL_NO_X11=true` to avoid including X11/libs.
I hardcoded it, but it should be present in the ebuild.
I can do the fix if needed.
(In reply to mathieu.tortuyaux from comment #0)
> I'm installing GTK+3 with Wayland support so no X USE flag.
Wayland support does not imply no X.
It actually fails to build if you don't have libX11 installed. It's not a hard dependency. I think this is related to bug #718794.
libtool: compile: i686-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I/var/tmp/portage/x11-libs/gtk+-3.24.18/work/gtk+-3.24.18/gdk/wayland -I../.. -DG_LOG_DOMAIN=\"Gdk\" -DG_LOG_USE_STRUCTURED=1 -DGDK_COMPILATION -I/var/tmp/portage/x11-libs/gtk+-3.24.18/work/gtk+-3.24.18 -I/var/tmp/portage/x11-libs/gtk+-3.24.18/work/gtk+-3.24.18/gdk -I../../gdk -fvisibility=hidden -DG_ENABLE_DEBUG -DG_DISABLE_CAST_CHECKS -DGLIB_MIN_REQUIRED_VERSION=GLIB_VERSION_2_56 -DGLIB_MAX_ALLOWED_VERSION=GLIB_VERSION_2_58 -pthread -I/usr/include/pango-1.0 -I/usr/include/harfbuzz -I/usr/include/pango-1.0 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/cairo -I/usr/include/gio-unix-2.0 -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/cairo -I/usr/lib/libffi/include -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/uuid -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/fribidi -O2 -march=i686 -pipe -Wall -c /var/tmp/portage/x11-libs/gtk+-3.24.18/work/gtk+-3.24.18/gdk/wayland/gdkglcontext-wayland.c -fPIC -DPIC -o .libs/gdkglcontext-wayland.o
In file included from /usr/include/epoxy/egl_generated.h:11,
/usr/include/EGL/eglplatform.h:128:10: fatal error: X11/Xlib.h: No such file or directory
128 | #include <X11/Xlib.h>
make: *** [Makefile:746: gdkglcontext-wayland.lo] Error 1
make: *** Waiting for unfinished jobs....
>> I'm installing GTK+3 with Wayland support so no X USE flag.
> Wayland support does not imply no X.
Yes, however the no X USE flag would imply no X. This along with gtk-engines-adwaita is the only barrier to a mergable Firefox on a Wayland-only system.