meson: Fix map files and load them to hide private symbols

Map files were using wrong syntax (missing final `;` or invalid chars).

Also, the map files were only monitored for rebuilding, but not really used by
ld, so pass the ldflags with version-script so that private symbols are really
hidden.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/395

cogl/cogl-gles2/libmutter-cogl-gles2.map

@@ -1,6 +1,4 @@
 {
-global:
-  gl*;
 local:
   *;
-}
+};

cogl/cogl-gles2/meson.build

@@ -8,12 +8,18 @@ cogl_gles2_sources = [
   'cogl-gles2-api.c',
 ]
 
+libmutter_cogl_gles2_map = 'libmutter-cogl-gles2.map'
+libmutter_cogl_gles2_link_args = [
+  '-Wl,--version-script,@0@/@1@'.format(meson.current_source_dir(),
+      libmutter_cogl_gles2_map),
+]
 libmutter_cogl_gles2 = shared_library('mutter-cogl-gles2-' + libmutter_api_version,
   sources: [cogl_gles2_sources, cogl_gles2_public_headers],
   soversion: '0.0.0',
   c_args: cogl_c_args,
   include_directories: [cogl_includepath, cogl_path_includepath],
-  link_depends: 'libmutter-cogl-gles2.map',
+  link_depends: libmutter_cogl_gles2_map,
+  link_args: libmutter_cogl_gles2_link_args,
   dependencies: [
     cogl_deps,
     libmutter_cogl_dep

cogl/cogl-pango/libmutter-cogl-pango.map

@@ -3,4 +3,4 @@ global:
   cogl_pango_*;
 local:
   *;
-}
+};

cogl/cogl-pango/meson.build

@@ -21,12 +21,18 @@ cogl_pango_deps = [
   libmutter_cogl_dep,
 ]
 
+libmutter_cogl_pango_map = 'libmutter-cogl-pango.map'
+libmutter_cogl_pango_link_args = [
+  '-Wl,--version-script,@0@/@1@'.format(meson.current_source_dir(),
+      libmutter_cogl_pango_map),
+]
 libmutter_cogl_pango = shared_library('mutter-cogl-pango-' + libmutter_api_version,
   sources: [cogl_pango_sources, cogl_pango_public_headers],
   soversion: '0.0.0',
   c_args: cogl_c_args,
   include_directories: [cogl_includepath, cogl_path_includepath],
-  link_depends: 'libmutter-cogl-pango.map',
+  link_depends: libmutter_cogl_pango_map,
+  link_args: libmutter_cogl_pango_link_args,
   dependencies: [cogl_pango_deps],
   install_rpath: pkglibdir,
   install_dir: pkglibdir,

cogl/cogl-path/libmutter-cogl-path.map

@@ -14,4 +14,4 @@ global:
   cogl2_set_*;
 local:
   *;
-}
+};

cogl/cogl-path/meson.build

@@ -52,12 +52,18 @@ cogl_path_c_args = [
   cogl_c_args,
 ]
 
+libmutter_cogl_path_map = 'libmutter-cogl-path.map'
+libmutter_cogl_path_link_args = [
+  '-Wl,--version-script,@0@/@1@'.format(meson.current_source_dir(),
+      libmutter_cogl_path_map),
+]
 libmutter_cogl_path = shared_library('mutter-cogl-path-' + libmutter_api_version,
   sources: [cogl_path_sources, cogl_path_public_headers],
   soversion: '0.0.0',
   c_args: cogl_path_c_args,
   include_directories: [cogl_includepath, cogl_path_includepath],
-  link_depends: 'libmutter-cogl-path.map',
+  link_depends: libmutter_cogl_path_map,
+  link_args: libmutter_cogl_path_link_args,
   dependencies: [libmutter_cogl_dep, cogl_deps],
   install_rpath: pkglibdir,
   install_dir: pkglibdir,

cogl/cogl/libmutter-cogl.map

@@ -45,7 +45,9 @@ global:
   _cogl_framebuffer_winsys_update_size;
   _cogl_winsys_egl_make_current;
   _cogl_winsys_egl_ensure_current;
-  _cogl_pixel_format_get_bytes_per_pixel).*";
+  _cogl_pixel_format_get_bytes_per_pixel*;
+  _cogl_system_error_quark;
+  _cogl_util_next_p2;
 local:
   *;
-}
+};

cogl/cogl/meson.build

@@ -466,12 +466,18 @@ if have_cogl_tests
 endif
 
 libmutter_cogl_name = 'mutter-cogl-' + libmutter_api_version
+libmutter_cogl_map = 'libmutter-cogl.map'
+libmutter_cogl_link_args = [
+  '-Wl,--version-script,@0@/@1@'.format(meson.current_source_dir(),
+      libmutter_cogl_map),
+]
 libmutter_cogl = shared_library(libmutter_cogl_name,
   sources: [cogl_sources, cogl_headers_all],
   soversion: '0.0.0',
   c_args: cogl_c_args,
   include_directories: cogl_includepath,
-  link_depends: 'libmutter-cogl.map',
+  link_depends: libmutter_cogl_map,
+  link_args: libmutter_cogl_link_args,
   dependencies: [cogl_deps, cogl_test_deps],
   install_rpath: pkglibdir,
   install_dir: pkglibdir,