fix glibc 2.22 build

* pthread/alloca_cutoff.c: New file.
* Makefile (routines): Add alloca_cutoff.
* Versions (GLIBC_PRIVATE): Add __libc_alloca_cutoff.

3 files changed, 29 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index f4db283..d5f6d67 100644
--- a/Makefile
+++ b/Makefile
@@ -191,7 +191,7 @@ headers :=				\
 ifeq ($(IN_GLIBC),yes)
 distribute :=
 
-routines := forward libc_pthread_init
+routines := forward libc_pthread_init alloca_cutoff
 shared-only-routines = forward
 
 vpath %.c
diff --git a/Versions b/Versions
index fb92b40..cf4ab5a 100644
--- a/Versions
+++ b/Versions
@@ -18,6 +18,7 @@ libc {
     __pthread_get_cleanup_stack;
   }
   GLIBC_PRIVATE {
+    __libc_alloca_cutoff;
     __libc_pthread_init;
     __register_atfork;
   }
diff --git a/pthread/alloca_cutoff.c b/pthread/alloca_cutoff.c
new file mode 100644
index 0000000..ec54d8f
--- /dev/null
+++ b/pthread/alloca_cutoff.c
@@ -0,0 +1,27 @@
+/* Allocate a new thread structure.
+   Copyright (C) 2015-2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <alloca.h>
+
+int
+__libc_alloca_cutoff (size_t size)
+{
+	return size <= 65536;
+}
+libc_hidden_def (__libc_alloca_cutoff)