2005-01-27  Stepan Kasal  <address@hidden>

	* lib/m4sugar/m4sh.m4 (_AS_DETECT_BETTER_SHELL): When testing
	  candidate shells, `($as_shell) 2> /dev/null' was used, to avoid
	  noise from ash (and other older shells), if $as_shell doesn't exist.
	  But it's enough to use `{ $as_shell; } 2> /dev/null' instead, as
	  the old noisy shells fork when handling redirected `{ ...; }'.

Index: lib/m4sugar/m4sh.m4
===================================================================
RCS file: /cvsroot/autoconf/autoconf/lib/m4sugar/m4sh.m4,v
retrieving revision 1.131
diff -u -r1.131 m4sh.m4
--- lib/m4sugar/m4sh.m4	3 Jan 2005 23:32:35 -0000	1.131
+++ lib/m4sugar/m4sh.m4	27 Jan 2005 16:18:27 -0000
@@ -234,7 +234,7 @@
 
       for as_shell in $as_candidate_shells $SHELL; do
 	 AS_IF([_AS_RUN([_AS_DETECT_REQUIRED_BODY],
-                        [($as_shell) 2> /dev/null])],
+                        [{ $as_shell; } 2> /dev/null])],
 	       [CONFIG_SHELL=$as_shell
 	       as_have_required=yes
 	       AS_IF([_AS_RUN([_AS_DETECT_SUGGESTED_BODY], [$as_shell 2> /dev/null])],