2006-10-04  Paul Eggert  <address@hidden>
 
	* lib/m4sugar/m4sh.m4 (_AS_DETECT_BETTER_SHELL): Use AS_EXECUTABLE_P
	rather than test -f.

Index: lib/m4sugar/m4sh.m4
===================================================================
RCS file: /cvsroot/autoconf/autoconf/lib/m4sugar/m4sh.m4,v
retrieving revision 1.194
retrieving revision 1.195
diff -u -r1.194 -r1.195
--- lib/m4sugar/m4sh.m4	4 Oct 2006 18:53:19 -0000	1.194
+++ lib/m4sugar/m4sh.m4	4 Oct 2006 21:16:06 -0000	1.195
@@ -255,7 +255,7 @@
 
       for as_shell in $as_candidate_shells $SHELL; do
 	 # Try only shells that exist, to save several forks.
-	 AS_IF([{ test -f "$as_shell" || test -f "$as_shell.exe"; } &&
+	 AS_IF([AS_EXECUTABLE_P(["$as_shell"]) &&
 		_AS_RUN([_AS_DETECT_REQUIRED_BODY],
                         [("$as_shell") 2> /dev/null])],
 	       [CONFIG_SHELL=$as_shell