X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/b9ad39c1fb2482e1513cdf9800b31e71b7986b39..b62042d20323d277284b91254d9cb860300fff9d:/m4/m4.m4

diff --git a/m4/m4.m4 b/m4/m4.m4
index 096fb287..a67b902b 100644
--- a/m4/m4.m4
+++ b/m4/m4.m4
@@ -1,7 +1,6 @@
-# m4.m4 serial 9
+# m4.m4 serial 10
 
-# Copyright (C) 2000, 2006, 2007, 2008, 2009 Free Software Foundation,
-# Inc.
+# Copyright (C) 2000, 2006-2010 Free Software Foundation, Inc.
 
 # Copying and distribution of this file, with or without modification,
 # are permitted in any medium without royalty provided the copyright
@@ -29,7 +28,7 @@ AC_PATH_PROGS_FEATURE_CHECK([M4], [m4 gm4 gnum4],
       ac_snippet=change'quote(<,>)in''dir(<if''def>,mac,bug)'
       ac_snippet=${ac_snippet}pat'subst(a,\(b\)\|\(a\),\1)d'nl
       test -z "`$ac_path_M4 -F conftest.m4f </dev/null 2>&1`" \
-      && test -z "`echo $ac_snippet | $ac_path_M4 --trace=mac 2>&1`" \
+      && test -z "`AS_ECHO([$ac_snippet]) | $ac_path_M4 --trace=mac 2>&1`" \
       && test -f conftest.m4f \
       && ac_cv_path_M4=$ac_path_M4 ac_path_M4_found=:
       rm -f conftest.m4f],