--- configure.in.orig	2011-10-26 15:48:25 +0000
+++ configure.in	2011-10-26 15:52:09 +0000
@@ -1540,7 +1540,7 @@
 fi
 
 AC_DEFUN(RUBY_STACK_GROW_DIRECTION, [
-    AC_CACHE_CHECK(stack growing direction on $1, rb_cv_stack_grow_dir_$1, [
+    AC_CACHE_CHECK(stack growing direction on $1, AS_TR_SH([rb_cv_stack_grow_dir_$1]), [
 AS_CASE(["$1"],
 [m68*|x86*|i?86|ia64|ppc*|sparc*|alpha*], [ $2=-1],
 [hppa*], [ $2=+1],
@@ -1564,8 +1564,8 @@
 }
 ], $2=-1, $2=+1, $2=0)
   ])
-eval rb_cv_stack_grow_dir_$1=\$$2])
-eval $2=\$rb_cv_stack_grow_dir_$1])
+eval AS_TR_SH([rb_cv_stack_grow_dir_$1])=\$$2])
+eval $2=\$[]AS_TR_SH([rb_cv_stack_grow_dir_$1])])
 if test "${universal_binary-no}" = yes ; then
     archflagpat=`eval echo '"'"${ARCH_FLAG}"'"' | sed 's/[[][|.*]]/\\&/g'`
     save_CFLAGS="$CFLAGS" new_cflags=`echo "$CFLAGS" | sed "s|$archflagpat"'||'`
@@ -1586,7 +1586,7 @@
     if test x$stack_dir = xno; then
 	for archs in ${universal_archnames}; do
 	    archs=`echo $archs | sed 's/=.*//'`
-	    eval dir=\$rb_cv_stack_grow_dir_$archs
+	    eval dir=\$[]AS_TR_SH([rb_cv_stack_grow_dir_$archs])
 	    RUBY_DEFINE_IF([defined __${archs}__], STACK_GROW_DIRECTION, $dir)
 	done
     else