From: Marek Polacek <polacek@redhat.com>
Date: Wed, 26 Mar 2014 06:58:15 +0000 (+0000)
Subject: re PR c/37428 (GNU VLA-in-structure extension is undocumented)
X-Git-Tag: releases/gcc-4.9.0~299
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d615d763225f330cf5416c95ad0726db67e227b4;p=thirdparty%2Fgcc.git

re PR c/37428 (GNU VLA-in-structure extension is undocumented)

	PR c/37428
	* doc/extend.texi (C Extensions): Mention variable-length arrays in
	a structure/union.

From-SVN: r208836
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index ff4a21bcf83e..8680951ae1af 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2014-03-26  Marek Polacek  <polacek@redhat.com>
+
+	PR c/37428
+	* doc/extend.texi (C Extensions): Mention variable-length arrays in
+	a structure/union.
+
 2014-03-26  Marek Polacek  <polacek@redhat.com>
 
 	PR c/39525
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index 90bf6d841a0f..19286226714e 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -1592,6 +1592,18 @@ Jumping or breaking out of the scope of the array name deallocates the
 storage.  Jumping into the scope is not allowed; you get an error
 message for it.
 
+@cindex variable-length array in a structure
+As an extension, GCC accepts variable-length arrays as a member of
+a structure or a union.  For example:
+
+@smallexample
+void
+foo (int n)
+@{
+  struct S @{ int x[n]; @};
+@}
+@end smallexample
+
 @cindex @code{alloca} vs variable-length arrays
 You can use the function @code{alloca} to get an effect much like
 variable-length arrays.  The function @code{alloca} is available in