docs: document Solaris 10 /bin/ksh and XPG4 sh 'unset' bug

* doc/autoconf.texi (Limitations of Builtins): Solaris 10 ksh
and XPG4 sh also fails upon `unset' of a variable that is not
set.

diff --git a/ChangeLog b/ChangeLog
index 219176f8ee629bffa73256789b8e8561c231629f..5ff3e92fde1d06aabe0d1cea4a9bf137f4fa57dd 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2011-09-13  Stefano Lattarini  <stefano.lattarini@gmail.com>
+
+       docs: document Solaris 10 /bin/ksh and XPG4 sh 'unset' bug
+       * doc/autoconf.texi (Limitations of Builtins): Solaris 10 ksh
+       and XPG4 sh also fails upon `unset' of a variable that is not
+       set.
+
 2011-07-24  Jim Meyering  <meyering@redhat.com>
 
        docs: improve the prose describing _AC_CHECK_TYPE_NEW_BODY

diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index 3377afe5a408d9045500d55084737aba8a596705..90ab4b9e17a675fc48e45dc7e88dfc33a73b002c 100644 (file)
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -18105,7 +18105,8 @@ and file name expansion.
 @item @command{unset}
 @c ------------------
 @prindex @command{unset}
-In some nonconforming shells (e.g., NetBSD 5.99.43 sh or Bash 2.05a),
+In some nonconforming shells (e.g., Solaris 10 @command{/bin/ksh} and
+@command{/usr/xpg4/bin/sh}, NetBSD 5.99.43 sh, or Bash 2.05a),
 @code{unset FOO} fails when @code{FOO} is not set.  This can interfere
 with @code{set -e} operation.  You can use