From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Alexandru Ardelean <alex@shruggie.ro>
Date: Wed, 3 Jun 2026 01:48:03 +0300
Subject: [PATCH] configure: assume __thread TLS works when cross-compiling

OpenWrt cross-compiles with gcc on musl, which supports __thread. The
AC_RUN_IFELSE check in fr_tls.m4 defaults to "no" for cross builds, so
TLS_STORAGE_CLASS is never defined, __THREAD is never set, and threads.h
falls through to '#error unsupported' (added in 3.2.9).

Signed-off-by: Alexandru Ardelean <alex@shruggie.ro>
---
--- a/configure
+++ b/configure
@@ -12625,7 +12625,7 @@ fi
 printf %s "checking for __thread support in compiler... " >&6; }
   if test "$cross_compiling" = yes
 then :
-  have_tls=no
+  have_tls=yes
 else $as_nop
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */