meson: use gnu_symbol_visibility argument

This uses a meson builtin to handle -fvisibility=hidden.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4740>

meson.build

@@ -120,11 +120,6 @@ foreach a : ['missing-field-initializers', 'format-truncation']
   endif
 endforeach
 
-c_vis_args = []
-if cc.has_argument('-fvisibility=hidden')
-  c_vis_args += '-fvisibility=hidden'
-endif
-
 # Check for generic C++ arguments
 cpp_args = []
 foreach a : ['-Werror=return-type',
@@ -151,11 +146,6 @@ foreach a : ['override-init', 'initializer-overrides']
   endif
 endforeach
 
-cpp_vis_args = []
-if cpp.has_argument('-fvisibility=hidden')
-  cpp_vis_args += '-fvisibility=hidden'
-endif
-
 foreach a : pre_args
   add_project_arguments(a, language : ['c', 'cpp'])
 endforeach

src/meson.build

@@ -118,15 +118,14 @@ vklayer_mesa_overlay = shared_library(
   overlay_spv,
   c_args : [
     pre_args,
-    c_vis_args,
     no_override_init_args,
     vulkan_wsi_args
     ],
   cpp_args : [
     pre_args,
-    cpp_vis_args,
     vulkan_wsi_args
     ],
+  gnu_symbol_visibility : 'hidden',
   dependencies : [
     vulkan_wsi_deps,
     libimgui_core_dep,
@@ -149,13 +148,12 @@ mangohud_dlsym = shared_library(
   ),
   c_args : [
     pre_args,
-    c_vis_args,
     no_override_init_args,
     ],
   cpp_args : [
     pre_args,
-    cpp_vis_args,
     ],
+  gnu_symbol_visibility : 'hidden',
   dependencies : [dep_dl],
   include_directories : [inc_common],
   link_args : link_args,