rusticl: specify which symbols to export

Drops release binary size from 31MB to 29MB

Signed-off-by: Karol Herbst <git@karolherbst.de>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23778>

src/gallium/targets/rusticl/meson.build

@@ -20,6 +20,14 @@
 
 opencl_version = '1'
 
+rusticl_ld_args = []
+rusticl_ld_depends = []
+
+if with_ld_version_script
+  rusticl_ld_args += ['-Wl,--version-script', join_paths(meson.current_source_dir(), 'rusticl.sym')]
+  rusticl_ld_depends += files('rusticl.sym')
+endif
+
 librusticl = shared_library(
   'RusticlOpenCL',
   'target.c',
@@ -54,7 +62,9 @@ librusticl = shared_library(
   link_args : [
     ld_args_build_id,
     ld_args_gc_sections,
+    rusticl_ld_args,
   ],
+  link_depends : rusticl_ld_depends,
   version : '@0@.0.0'.format(opencl_version),
   install : true,
 )

src/gallium/targets/rusticl/rusticl.sym

@@ -0,0 +1,8 @@
+{
+	global:
+		clGetPlatformInfo;
+		clGetExtensionFunctionAddress;
+		clIcdGetPlatformIDsKHR;
+	local:
+		*;
+};