glx: make it more obvious what libglapi_bridge is

Reviewed-by: Adam Jackson <ajax@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33634>

src/gallium/targets/libgl-xlib/meson.build

@@ -27,7 +27,7 @@ libgl = shared_library(
   gnu_symbol_visibility : 'hidden',
   link_args : [ld_args_bsymbolic, ld_args_gc_sections, gallium_xlib_ld_args],
   link_depends : gallium_xlib_link_depends,
-  link_whole : [libxlib, libglapi_static],
+  link_whole : [libxlib, (with_shared_glapi ? libglapi_bridge : libglapi_static)],
   link_with : [
     libgalliumvl_stub, libws_xlib,
     libgallium, libmesa, gallium_xlib_link_with,

src/gallium/targets/osmesa/meson.build

@@ -33,7 +33,7 @@ libosmesa = shared_library(
     inc_gallium_drivers,
   ],
   link_depends : osmesa_link_deps,
-  link_whole : [libosmesa_st, libglapi_static],
+  link_whole : [libosmesa_st, (with_shared_glapi ? libglapi_bridge : libglapi_static)],
   link_with : [
     libmesa, libgallium, libws_null, osmesa_link_with,
   ],

src/gallium/targets/wgl/meson.build

@@ -20,7 +20,7 @@ libgallium_wgl = shared_library(
   ],
   link_whole : [libwgl],
   link_with : [
-    libgallium, libglsl, libmesa, libwsgdi, libglapi_static, libglapi, libgalliumvl_stub,
+    libgallium, libglsl, libmesa, libwsgdi, (with_shared_glapi ? libglapi_bridge : libglapi_static), libglapi, libgalliumvl_stub,
   ],
   dependencies : [
     dep_ws2_32, idep_nir, idep_mesautil, driver_swrast,

src/glx/meson.build

@@ -130,10 +130,18 @@ libglx = static_library(
   ],
 )
 
+if with_shared_glapi
+  # libglapi_bridge contains GL functions that we need to export from libGL.so.
+  # Other than that, we don't need it.
+  libgl_link = with_glvnd ? [] : [libglapi_bridge]
+else
+  libgl_link = libglapi_static
+endif
+
 libgl = shared_library(
   gl_lib_name,
   [],
-  link_with : [libglapi_static],
+  link_with : libgl_link,
   link_whole : libglx,
   link_args : [ld_args_bsymbolic, ld_args_gc_sections, extra_ld_args_libgl],
   dependencies : [

src/mapi/glapi/meson.build

@@ -67,9 +67,7 @@ libglapi_bridge = static_library(
   build_by_default : false,
 )
 
-if with_shared_glapi
-  libglapi_static = libglapi_bridge
-else
+if not with_shared_glapi
   libglapi_static = static_library(
     'glapi_static',
     static_glapi_files,