Tell GCC to stop exporting static library functions

Should fix crashes where games using Dear ImGui link to ours.

include/elfhacks.h

@@ -37,7 +37,8 @@
 extern "C" {
 #endif
 
-#define __PUBLIC __attribute__ ((visibility ("default")))
+//#define __PUBLIC __attribute__ ((visibility ("default")))
+#define __PUBLIC
 
 #if UINTPTR_MAX == 0xffffffffffffffff
 # define __elf64

src/meson.build

@@ -129,7 +129,7 @@ vklayer_mesa_overlay = shared_library(
     dep_pthread,
     dep_vulkan],
   include_directories : [inc_common],
-  link_args : cc.get_supported_link_arguments(['-Wl,-Bsymbolic-functions', '-Wl,-z,relro']),
+  link_args : cc.get_supported_link_arguments(['-Wl,-Bsymbolic-functions', '-Wl,-z,relro', '-Wl,--exclude-libs,ALL']),
   install_dir : libdir_mangohud,
   install : true
 )