From: Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
Date: Sun, 12 Sep 2010 16:37:08 +0000 (+0200)
Subject: docs: document zsh specialty with empty here-documents.
X-Git-Tag: v2.68~19
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=97d209ddb1ae2ccc0ac3c5272341252bbec39bed;p=thirdparty%2Fautoconf.git

docs: document zsh specialty with empty here-documents.

* doc/autoconf.texi (Here-Documents): zsh 4.3.10 adds a newline
to empty here-docs.

Signed-off-by: Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
---

diff --git a/ChangeLog b/ChangeLog
index 2c83e2b9..9431c94d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2010-09-13  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
+	    Gary V. Vaughan <gary@gnu.org>
+
+	docs: document zsh specialty with empty here-documents.
+	* doc/autoconf.texi (Here-Documents): zsh 4.3.10 adds a newline
+	to empty here-docs.
+
 2010-09-13  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
 
 	docs: document zsh special array $options.
diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index f11f1dd8..71eefa40 100644
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -14897,6 +14897,15 @@ fixed in
 @samp{ksh93g} (1998-04-30) but as of 2006 many operating systems were
 still shipping older versions with the bug.
 
+Empty here-documents are not portable either; with the following code,
+@command{zsh} up to at least version 4.3.10 creates a file with a single
+newline, whereas other shells create an empty file:
+
+@example
+cat >file <<EOF
+EOF
+@end example
+
 Many shells (including the Bourne shell) implement here-documents
 inefficiently.  In particular, some shells can be extremely inefficient when
 a single statement contains many here-documents.  For instance if your