From 2066c35b3ff6e35edf2a4e903f9aa79a23b6aefe Mon Sep 17 00:00:00 2001
From: Vladimir Serbinenko <phcoder@gmail.com>
Date: Sun, 22 Feb 2015 17:45:30 +0100
Subject: [PATCH] Allow clang compilation for thumb with -mthumb-interwork.

clang already uses -mthumb-interwork behaviour even thout it doesn't
support the option.
---
 configure.ac | 13 +------------
 1 file changed, 1 insertion(+), 12 deletions(-)

diff --git a/configure.ac b/configure.ac
index 35f430a0a..8f9ab8133 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1029,20 +1029,9 @@ if test "x$target_cpu" = xarm; then
   ])
   if test "x$grub_cv_cc_mthumb_interwork" = xyes; then
     TARGET_CFLAGS="$TARGET_CFLAGS -mthumb-interwork"
+  # Clang defaults to thumb interworking
   elif test "x$grub_cv_cc_target_clang" = xno ; then
     AC_MSG_ERROR([your compiler doesn't support -mthumb-interwork])
-  else
-    CFLAGS="$TARGET_CFLAGS"
-    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[
-#if defined (__thumb__) && !defined (__thumb2__)
-#error thumb without interworking
-#endif
-]])],
-		      [no_interwork_ok=yes],
-		      [no_interwork_ok=no])
-    if test x$no_interwork_ok = xno ; then
-       AC_MSG_ERROR([attempt to compile to thumb with no thumb interwork])
-    fi
   fi
 fi