2006-03-22  Stepan Kasal  <address@hidden>

	* lib/autoconf/general.m4 (_AC_CACHE_DUMP): Grep for `^ac_space'
	  so that the test is not fooled by variables containing string
	  `ac_space= '.  If there is no substitution needed, do not call sed.

Index: lib/autoconf/general.m4
===================================================================
RCS file: /cvsroot/autoconf/autoconf/lib/autoconf/general.m4,v
retrieving revision 1.891
diff -u -r1.891 general.m4
--- lib/autoconf/general.m4	16 Mar 2006 13:33:18 -0000	1.891
+++ lib/autoconf/general.m4	21 Mar 2006 23:18:08 -0000
@@ -1813,8 +1813,8 @@
 # and sets the high bit in the cache file unless we assign to the vars.
 {
   (set) 2>&1 |
-    case `(ac_space=' '; set | grep ac_space) 2>&1` in
-    *ac_space=\ *)
+    case `(ac_space=' '; set | grep '^ac_space') 2>&1` in
+    ac_space=\ *)
       # `set' does not quote correctly, so add quotes (double-quote
       # substitution turns \\\\ into \\, and sed turns \\ into \).
       sed -n \
@@ -1823,8 +1823,7 @@
       ;;
     *)
       # `set' quotes correctly as required by POSIX, so do not add quotes.
-      sed -n \
-	["s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1=\\2/p"]
+      grep ["^[_$as_cr_alnum]*_cv_[_$as_cr_alnum]*="]
       ;;
     esac;
 }dnl