[PATCH] stdalign: correct mistake in alignof doc

[Paul Eggert]

Problem reported by Joseph Myers in:
https://gcc.gnu.org/ml/gcc-patches/2016-09/msg00340.html
* doc/posix-headers/stdalign.texi: Do not imply that C11 prohibits
alignof(S) where S is a structure containing a flexible array
member.  The Gnulib substitute does not support this, but C11 does.
---
 ChangeLog                       | 9 +++++++++
 doc/posix-headers/stdalign.texi | 7 +++----
 2 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index b99af4e..c9513a8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2016-09-06  Paul Eggert  <address@hidden>
+
+       stdalign: correct mistake in alignof doc
+       Problem reported by Joseph Myers in:
+       https://gcc.gnu.org/ml/gcc-patches/2016-09/msg00340.html
+       * doc/posix-headers/stdalign.texi: Do not imply that C11 prohibits
+       alignof(S) where S is a structure containing a flexible array
+       member.  The Gnulib substitute does not support this, but C11 does.
+
 2016-08-18  Pino Toscano  <address@hidden>
 
        main.mk: remove sc_program_name, since there is no more need to
diff --git a/doc/posix-headers/stdalign.texi b/doc/posix-headers/stdalign.texi
index f795306..4f2833a 100644
--- a/doc/posix-headers/stdalign.texi
+++ b/doc/posix-headers/stdalign.texi
@@ -30,10 +30,9 @@ parenthesized type.  Recent versions of GCC support an 
extension in
 which the operand can also be a unary expression, as with
 @code{sizeof}.  The Gnulib substitute does not support this extension.
 @item
-In ISO C11, the operand of @code{alignof}/@code{_Alignof} must be a
-complete type.  Recent versions of GCC support an extension in which
-the operand can also be structure type containing a flexible array
-member.  The Gnulib substitute does not support this extension.
+On most pre-C11 platforms, the operand of
address@hidden/@code{_Alignof} cannot be a structure type containing a
+flexible array member.
 @item
 @code{_Alignas} and @code{alignas} are not always supported;
 on platforms lacking support, the
-- 
2.7.4