fix glibc 2.22 build

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

1 files changed, 1 insertions, 0 deletions

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;
   }