2 files changed, 43 insertions, 0 deletions
diff --git a/gnulib b/gnulib
deleted file mode 160000
-Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1
diff --git a/gnulib/doc/alloca.texi b/gnulib/doc/alloca.texi
new file mode 100644
index 0000000..bb9e132
--- /dev/null
+++ b/gnulib/doc/alloca.texi
@@ -0,0 +1,43 @@
+@c Documentation of gnulib module 'alloca'.
+
+@c Copyright (C) 2004, 2007, 2009-2011 Free Software Foundation, Inc.
+
+@c Permission is granted to copy, distribute and/or modify this document
+@c under the terms of the GNU Free Documentation License, Version 1.3 or
+@c any later version published by the Free Software Foundation; with no
+@c Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
+@c Texts.  A copy of the license is included in the ``GNU Free
+@c Documentation License'' file as part of this distribution.
+
+The alloca module provides for a function @code{alloca} which allocates
+memory on the stack, where the system allows it. A memory block allocated with
+@code{alloca} exists only until the function that calls @code{alloca} returns
+or exits abruptly.
+
+There are a few systems where this is not possible: HP-UX systems, and some
+other platforms when the C++ compiler is used. On these platforms the alloca
+module provides a @code{malloc} based emulation. This emulation will not free a
+memory block immediately when the calling function returns, but rather will
+wait until the next @code{alloca} call from a function with the same or a
+shorter stack length. Thus, in some cases, a few memory blocks will be kept
+although they are not needed any more.
+
+The user can @code{#include <alloca.h>} and use @code{alloca} on all platforms.
+Note that the @code{#include <alloca.h>} must be the first one after the
+autoconf-generated @file{config.h}, for AIX 3 compatibility. Thanks to IBM for
+this nice restriction!
+
+Note that GCC 3.1 and 3.2 can @emph{inline} functions that call @code{alloca}.
+When this happens, the memory blocks allocated with @code{alloca} will not be
+freed until @emph{the end of the calling function}. If this calling function
+runs a loop calling the function that uses @code{alloca}, the program easily
+gets a stack overflow and crashes. To protect against this compiler behaviour,
+you can mark the function that uses @code{alloca} with the following attribute:
+
+@smallexample
+#ifdef __GNUC__
+__attribute__ ((__noinline__))
+#endif
+@end smallexample
+
+An alternative to this module is the @samp{alloca-opt} module.