Add library specific version scripts that match enabled features

LLD is stricter with version scripts and will complain about nonexisting
symbols in version files.

Signed-off-by: Alfred Wingate <parona@protonmail.com>

Author: parona-source

src/mangohud.version

@@ -3,10 +3,5 @@
   global:
     overlay_GetInstanceProcAddr;
     overlay_GetDeviceProcAddr;
-    glX*;
-    egl*;
-    dlsym;
-    mangohud_find_glx_ptr;
-    mangohud_find_egl_ptr;
   local: *;
 };

src/mangohud_opengl.version.in

@@ -0,0 +1,6 @@
+{
+    global:
+        @x11_symbols@
+        @wayland_symbols@
+    local: *;
+};

src/meson.build

@@ -168,8 +168,6 @@ if is_unixy
 endif
 
 link_args = cc.get_supported_link_arguments(['-Wl,-Bsymbolic-functions', '-Wl,-z,relro', '-Wl,--exclude-libs,ALL', '-lGL', '-static-libstdc++'])
-# meson fails to check version-script so just force add
-link_args += '-Wl,--version-script,@0@'.format(join_paths(meson.current_source_dir(), 'mangohud.version'))
 
 mangohud_static_lib = static_library(
   'MangoHud',
@@ -211,11 +209,25 @@ mangohud_shared_lib = shared_library(
   'MangoHud',
   objects: mangohud_static_lib.extract_all_objects(),
   link_with: mangohud_static_lib,
-  link_args : link_args,
+  link_args : [link_args, '-Wl,--version-script,@0@'.format(join_paths(meson.current_source_dir(), 'mangohud.version'))],
   install_dir : libdir_mangohud,
   install: true
 )
 
+mangohud_opengl_syms = configuration_data()
+if get_option('with_x11').enabled()
+  mangohud_opengl_syms.set('x11_symbols', 'glX*; mangohud_find_glx_ptr;')
+endif
+if get_option('with_wayland').enabled()
+  mangohud_opengl_syms.set('wayland_symbols', 'egl*; mangohud_find_egl_ptr;')
+endif
+
+mangohud_opengl_version_file = configure_file(
+  input: 'mangohud_opengl.version.in',
+  output: 'mangohud_opengl.version',
+  configuration: mangohud_opengl_syms,
+)
+
 mangohud_opengl_shared_lib = shared_library(
   'MangoHud_opengl',
   mangohud_version,
@@ -244,8 +256,9 @@ mangohud_opengl_shared_lib = shared_library(
     json_dep,
     implot_dep],
   include_directories : [inc_common],
-  link_args : link_args,
+  link_args : [link_args, '-Wl,--version-script,@0@'.format(join_paths(meson.current_build_dir(), 'mangohud_opengl.version'))],
   link_with: mangohud_static_lib,
+  link_depends: mangohud_opengl_version_file,
   install_dir : libdir_mangohud,
   install: true
 )