internal.h: export rb_sys_fail_path_with_func

* internal.h (rb_sys_fail_path_with_func): export for
  socket/basicsocket.c.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39761 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/socket/basicsocket.c

@@ -247,8 +247,6 @@ bsock_setsockopt(int argc, VALUE *argv, VALUE sock)
 	break;
     }
 
-#define rb_sys_fail_path(path) rb_sys_fail_str(path)
-
     rb_io_check_closed(fptr);
     if (setsockopt(fptr->fd, level, option, v, vlen) < 0)
 	rb_sys_fail_path(fptr->pathv);

internal.h

@@ -123,7 +123,13 @@ VALUE rb_get_path_check_convert(VALUE, VALUE, int);
 void Init_File(void);
 
 #ifdef RUBY_FUNCTION_NAME_STRING
+# if defined __GNUC__ && __GNUC__ >= 4
+#   pragma GCC visibility push(default)
+# endif
 NORETURN(void rb_sys_fail_path_with_func(const char *func_name, VALUE path));
+# if defined __GNUC__ && __GNUC__ >= 4
+#   pragma GCC visibility pop
+# endif
 # define rb_sys_fail_path(path) rb_sys_fail_path_with_func(RUBY_FUNCTION_NAME_STRING, path)
 #else
 # define rb_sys_fail_path(path) rb_sys_fail_str(path)