pkgs/development/libraries/libepoxy/libgl-path.patch

   1 diff --git a/src/dispatch_common.c b/src/dispatch_common.c
   2 index b3e4f5f..303e8f5 100644
   3 --- a/src/dispatch_common.c
   4 +++ b/src/dispatch_common.c
   5 @@ -310,6 +310,19 @@ get_dlopen_handle(void **handle, const char *lib_name, bool exit_on_fail, bool l
   6              flags |= RTLD_NOLOAD;
   7
   8          *handle = dlopen(lib_name, flags);
   9 +#ifdef LIBGL_PATH
  10 +        if (!*handle) {
  11 +          char pathbuf[sizeof(LIBGL_PATH) + 1 + 1024 + 1];
  12 +          int l = snprintf(pathbuf, sizeof(pathbuf), "%s/%s", LIBGL_PATH, lib_name);
  13 +          if (l < 0 || l >= sizeof(pathbuf)) {
  14 +            // This really shouldn't happen
  15 +            fprintf(stderr, "Error prefixing library pathname\n");
  16 +            exit(1);
  17 +          }
  18 +          *handle = dlopen(pathbuf, flags);
  19 +        }
  20 +#endif
  21 +
  22          if (!*handle) {
  23              if (exit_on_fail) {
  24                  fprintf(stderr, "Couldn't open %s: %s\n", lib_name, dlerror());