Port to C11 aligned_alloc, and fix some integer overflows.

* configure.ac (GMALLOC_OBJ): Initialize to empty if !system_malloc
and doug_lea_malloc.
(aligned_alloc): Test for existence if !GMALLOC_OBJ and not darwin.
(posix_memalign): Test for existence only if !GMALLOC_OBJ and
not darwin and !aligned_alloc.
* src/alloc.c (USE_ALIGNED_ALLOC): New symbol.
(USE_POSIX_MEMALIGN): Remove.  All uses replaced with USE_ALIGNED_ALLOC,
and use of posix_memalign replaced with aligned_alloc.
(aligned_alloc): New function, defined or declared as needed.
* src/conf_post.h (HAVE_POSIX_MEMALIGN) [DARWIN_OS]:
Don't undef; configure.ac now does this.
* src/gmalloc.c (aligned_alloc) [MSDOS]: New decl.
(calloc, aligned_alloc): Check for integer overflow.
(aligned_alloc): Rename from memalign.  All uses changed.
(memalign): New function, an alias for aligned_alloc.

1 files changed, 9 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 5ae941aa4ee..05ab15e0da6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2013-11-07  Paul Eggert  <eggert@cs.ucla.edu>
+
+        Port to C11 aligned_alloc.
+        * configure.ac (GMALLOC_OBJ): Initialize to empty if !system_malloc
+        and doug_lea_malloc.
+        (aligned_alloc): Test for existence if !GMALLOC_OBJ and not darwin.
+        (posix_memalign): Test for existence only if !GMALLOC_OBJ and
+        not darwin and !aligned_alloc.
+
 2013-11-05  Glenn Morris  <rgm@gnu.org>
 
         * configure.ac (abs_srcdir) [MINGW32]: No point setting it here,