2005-06-04  Stepan Kasal  <address@hidden>

	* doc/autoconf.texi (Limitations of Usual Tools): AIX awk cannot
	  swallow literals longer than 399.  Reported by Ralf Wildenhues.
	* lib/autotest/general.m4 (AT_INIT): Pass $at_groups though stdin,
	  to workaround this limitation.

Index: doc/autoconf.texi
===================================================================
RCS file: /cvsroot/autoconf/autoconf/doc/autoconf.texi,v
retrieving revision 1.903
diff -u -r1.903 autoconf.texi
--- doc/autoconf.texi	1 Jun 2005 07:20:26 -0000	1.903
+++ doc/autoconf.texi	4 Jun 2005 07:26:07 -0000
@@ -11513,6 +11513,9 @@
 Either do not depend on such patterns (i.e., use @samp{/^(.*foo|bar)/},
 or use a simple test to reject such address@hidden
 
address@hidden version 5.2 limits on the maximal length of regular
+expressions and literal strings in the program to 399.
+
 
 @item @command{cat}
 @c ----------------
Index: lib/autotest/general.m4
===================================================================
RCS file: /cvsroot/autoconf/autoconf/lib/autotest/general.m4,v
retrieving revision 1.180
diff -u -r1.180 general.m4
--- lib/autotest/general.m4	2 Jun 2005 23:30:13 -0000	1.180
+++ lib/autotest/general.m4	4 Jun 2005 07:26:07 -0000
@@ -442,10 +442,11 @@
 
 _ATEOF
   # "  1 42  45 " => "^(1|42|45);".
-  echo "$at_help_all" |
-    awk 'BEGIN {
-	   for (n = split("'"$at_groups"'", a); n; n--) selected[[a[n]]] = 1
+  echo "$at_groups$as_nl$at_help_all" |
+    awk 'NR == 1 {
+	   for (n = NF; n; n--) selected[[$n]] = 1
 	   FS = ";"
+	   next
 	 }
 	 {
 	   if (selected[[$ 1]]) {