* lib/autotest/general.m4 (_AT_NORMALIZE_TEST_GROUP_NUMBER): Use `eval'.

* doc/autoconf.texi ($@, case): Document Zsh limitations.

ChangeLog

@@ -1,3 +1,8 @@
+2007-05-05  Noah Misch  <noah@cs.caltech.edu>
+
+	* lib/autotest/general.m4 (_AT_NORMALIZE_TEST_GROUP_NUMBER): Use `eval'.
+	* doc/autoconf.texi ($@, case): Document Zsh limitations.
+
 2007-05-03  Stepan Kasal  <kasal@ucw.cz>
 
 	* lib/autoconf/lang.m4 (_AC_COMPILER_EXEEXT_DEFAULT): Put a.out first.

doc/autoconf.texi

@@ -11600,6 +11600,10 @@ One workaround relies on Zsh's ``global aliases'' to convert
 test "$@{ZSH_VERSION+set@}" = set && alias -g '$@{1+"$@@"@}'='"$@@"'
 @end example
 
+Zsh only recognizes this alias when a shell word matches it exactly;
+@samp{"foo"$@{1+"$@@"@}} remains subject to word splitting.  Since this
+case always yields at least one shell word, use plain @samp{"$@@"}.
+
 A more conservative workaround is to avoid @samp{"$@@"} if it is
 possible that there may be no positional arguments.  For example,
 instead of:
@@ -12358,6 +12362,16 @@ esac
 but the @code{(} in this example is not portable to many Bourne
 shell implementations.  It can be omitted safely.
 
+Zsh handles pattern fragments derived from parameter expansions or
+command substitutions as though quoted:
+
+@example
+$ pat=\?; case aa in ?$pat) echo match;; esac
+$ pat=\?; case a? in ?$pat) echo match;; esac
+match
+@end example
+
+@noindent
 Because of a bug in its @code{fnmatch}, Bash fails to properly
 handle backslashes in character classes:
 

lib/autotest/general.m4

@@ -154,12 +154,12 @@ m4_define([AT_LINE],
 # all the other test group numbers.
 m4_define([_AT_NORMALIZE_TEST_GROUP_NUMBER],
 [
-  while :; do
+  eval 'while :; do
     case $$1 in #(
-    $at_format*) break;;
+    '"$at_format"'*) break;;
     esac
     $1=0$$1
-  done
+  done'
 ])
 
 # _AT_CREATE_DEBUGGING_SCRIPT