From: Benoit Sigoure <tsuna@lrde.epita.fr>
Date: Sun, 11 Nov 2007 17:41:58 +0000 (+0100)
Subject: Document that $((expression)) is not portable.
X-Git-Tag: v2.62~151
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6d8cbe20d4ddfa4a1f631fc2615625d5b60294bc;p=thirdparty%2Fautoconf.git

Document that $((expression)) is not portable.

	* doc/autoconf.texi (Shell Substitutions): Here.

Signed-off-by: Benoit Sigoure <tsuna@lrde.epita.fr>
---

diff --git a/ChangeLog b/ChangeLog
index 69e6990f..d8c5b940 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2007-11-11  Benoit Sigoure  <tsuna@lrde.epita.fr>
+
+	Document that $((expression)) is not portable.
+	* doc/autoconf.texi (Shell Substitutions): Here.
+
 2007-11-10  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
 
 	Ignore configure --help* errors due to LINENO-impaired shells.
diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index 421056e0..acc80cf4 100644
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -13061,6 +13061,14 @@ mishandle them.  For example, Bash 3.1, @samp{ksh88}, @command{pdksh}
 echo $(case x in x) echo hello;; esac)
 @end example
 
+
+@item $((@var{expression}))
+@cindex $((@var{expression}))
+Arithmetic expansion is not portable as some shells (most
+notably Solaris 10 @command{/bin/sh}) don't support it.
+
+
+
 @item ^
 @cindex ^ quoting
 Always quote @samp{^}, otherwise traditional shells such as