Allow clang compilation for thumb with -mthumb-interwork.

clang already uses -mthumb-interwork behaviour even thout it doesn't
support the option.

diff --git a/configure.ac b/configure.ac
index 35f430a0ae75f2e1828bfbba78726797d1fd50b5..8f9ab81335718fc7d16a573e93403432bb8ce55f 100644 (file)
--- 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