meson/gbm: clean up dependencies

- move everything that's actually only used by the DRI backend to the backend
- remove some things that aren't used at all

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31223>

src/gbm/backends/dri/meson.build

@@ -1,10 +1,20 @@
+deps_gbm_dri = []
+
+# TODO: fix includes to delete this
+incs_gbm_dri = [inc_mesa]
+
+if with_platform_wayland
+  deps_gbm_dri += dep_wayland_server
+  incs_gbm_dri += inc_wayland_drm
+endif
+
 libgbm_dri = shared_library(
   'dri_gbm',
   files('gbm_dri.c', 'gbm_driint.h'),
-  include_directories : incs_gbm,
+  include_directories : [incs_gbm, incs_gbm_dri, inc_st_dri, inc_gallium_aux],
   link_args : [ld_args_gc_sections],
   link_with : [libloader, libgallium_dri],
-  dependencies : [deps_gbm, dep_dl, dep_thread, dep_libdrm, idep_mesautil, idep_xmlconfig],
+  dependencies : [deps_gbm_dri, dep_dl, dep_libdrm, idep_mesautil, idep_xmlconfig],
   gnu_symbol_visibility : 'hidden',
   install : true,
   install_dir: join_paths(get_option('libdir'), 'gbm'),

src/gbm/meson.build

@@ -10,22 +10,10 @@ files_gbm = files(
   'main/gbm.h',
   'main/gbmint.h',
 )
-deps_gbm = []
 args_gbm = [
   '-DDEFAULT_BACKENDS_PATH="@0@"'.format(gbm_backends_path),
 ]
-deps_gbm = []
-incs_gbm = [
-  include_directories('main'), inc_include, inc_src, inc_loader, inc_gallium, inc_st_dri, inc_gallium_aux
-]
-
-# TODO: fix includes to delete this
-incs_gbm += inc_mesa
-
-if with_platform_wayland
-  deps_gbm += dep_wayland_server
-  incs_gbm += inc_wayland_drm
-endif
+incs_gbm = [include_directories('main'), inc_loader, inc_gallium]
 
 if with_dri2
   subdir('backends/dri')
@@ -44,7 +32,7 @@ libgbm = shared_library(
   c_args : [args_gbm],
   link_args : [ld_args_gc_sections],
   link_with : [libloader],
-  dependencies : [deps_gbm, dep_dl, dep_thread, dep_libdrm, idep_mesautil, idep_xmlconfig],
+  dependencies : [dep_libdrm, idep_xmlconfig],
   gnu_symbol_visibility : 'hidden',
   version : '1.0.0',
   install : true,