2006-03-16  Stepan Kasal  <address@hidden>

	* lib/m4sugar/m4sh.m4 (_AS_PREPARE): Move the IFS setup and CDPATH
	  sanitizing...
	(AS_SHELL_SANITIZE): ...here; mention _AS_PATH_WALK needs IFS set.
	* lib/autoconf/general.m4 (_AC_CANONICAL_SPLIT): Add an explanation
	  why IFS is restored so late; thank you, Ralf, for reminding us.
	
Index: lib/autoconf/general.m4
===================================================================
RCS file: /cvsroot/autoconf/autoconf/lib/autoconf/general.m4,v
retrieving revision 1.890
diff -u -r1.890 general.m4
--- lib/autoconf/general.m4	21 Feb 2006 07:16:33 -0000	1.890
+++ lib/autoconf/general.m4	16 Mar 2006 13:19:00 -0000
@@ -1664,6 +1664,7 @@
 AC_SUBST([$1_cpu], [$[1]])dnl
 AC_SUBST([$1_vendor], [$[2]])dnl
 shift; shift
+[# Remember, the first character of IFS is used to create $]*:
 AC_SUBST([$1_os], [$[*]])dnl
 IFS=$ac_save_IFS
 ])# _AC_CANONICAL_SPLIT
Index: lib/m4sugar/m4sh.m4
===================================================================
RCS file: /cvsroot/autoconf/autoconf/lib/m4sugar/m4sh.m4,v
retrieving revision 1.161
diff -u -r1.161 m4sh.m4
--- lib/m4sugar/m4sh.m4	14 Mar 2006 07:18:18 -0000	1.161
+++ lib/m4sugar/m4sh.m4	16 Mar 2006 13:19:02 -0000
@@ -326,6 +326,14 @@
 _AS_PATH_SEPARATOR_PREPARE
 _AS_UNSET_PREPARE
 
+# IFS
+# We need space, tab and new line, in precisely that order.
+# (If _AS_PATH_WALK were called with IFS unset, it would disable word
+# splitting by setting IFS to empty value.)
+as_nl='
+'
+IFS=" 	$as_nl"
+
 # Find who we are.  Look in the path if we contain no path at all
 # relative or not.
 case $[0] in
@@ -371,6 +379,8 @@
 # Name of the executable.
 as_me=`AS_BASENAME("$[0]")`
 
+# CDPATH.
+$as_unset CDPATH
 ])
 
 
@@ -396,15 +406,6 @@
 _AS_TEST_PREPARE
 _AS_TR_CPP_PREPARE
 _AS_TR_SH_PREPARE
-
-# IFS
-# We need space, tab and new line, in precisely that order.
-as_nl='
-'
-IFS=" 	$as_nl"
-
-# CDPATH.
-$as_unset CDPATH
 ])