meson: remove broken -Dwith_dlsym

The option does not even build, so let's remove it.

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>

meson_options.txt

@@ -12,7 +12,6 @@ option('with_xnvctrl', type : 'feature', value : 'enabled', description: 'Enable
 option('with_x11', type : 'feature', value : 'enabled')
 option('with_wayland', type : 'feature', value : 'disabled')
 option('with_dbus', type : 'feature', value : 'enabled')
-option('with_dlsym', type : 'feature', value : 'disabled')
 option('loglevel', type: 'combo', choices : ['trace', 'debug', 'info', 'warn', 'err', 'critical', 'off'], value : 'info', description: 'Max log level in non-debug build')
 option('mangoapp', type: 'boolean', value : false)
 option('mangoapp_32bit', type: 'boolean', value : false)

src/meson.build

@@ -93,10 +93,6 @@ if is_unixy
     'gl/inject_egl.cpp',
   )
 
-  if get_option('with_dlsym').enabled()
-      pre_args += '-DHOOK_DLSYM'
-  endif
-
   nvml_h_found = get_option('with_nvml') == 'enabled'
   if get_option('with_nvml') == 'system'
     nvml_h_found = cc.has_header('nvml.h')

src/real_dlsym.cpp

@@ -103,29 +103,3 @@ void* get_proc_address(const char* name) {
     void (*func)() = (void (*)())real_dlsym(RTLD_NEXT, name);
     return (void*)func;
 }
-
-#ifdef HOOK_DLSYM
-EXPORT_C_(void *) mangohud_find_glx_ptr(const char *name);
-EXPORT_C_(void *) mangohud_find_egl_ptr(const char *name);
-
-EXPORT_C_(void*) dlsym(void * handle, const char * name)
-{
-    void* func = nullptr;
-#ifdef HAVE_X11
-    func = mangohud_find_glx_ptr(name);
-    if (func) {
-        //fprintf(stderr,"%s: local: %s\n",  __func__ , name);
-        return func;
-    }
-#endif
-
-    func = mangohud_find_egl_ptr(name);
-    if (func) {
-        //fprintf(stderr,"%s: local: %s\n",  __func__ , name);
-        return func;
-    }
-
-    //fprintf(stderr,"%s: foreign: %s\n",  __func__ , name);
-    return real_dlsym(handle, name);
-}
-#endif