regex: avoid glibc deadlock during configure glibc has a known bug where certain corruptions of the heap can cause malloc to default to printing a debug message that includes a backtrace, but the act of getting the backtrace uses dlopen which in turn calls into malloc, causing a recursive lock ending in deadlock. Thus, when configure is probing for a known glibc heap corruption bug, the overall configure would hang. The solution suggested by glibc developers is to force malloc to quit printing debug messages, which avoids recursive malloc. * m4/regex.m4 (gl_REGEX): Avoid recursive malloc deadlock when glibc bug 15078 in turn triggers bug 16159. Reported by Michal Privoznik. Signed-off-by: Eric Blake <eblake@redhat.com>

#serial 5

# Copyright (C) 2006-2007, 2009-2013 Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# glibc provides __gen_tempname as a wrapper for mk[ds]temp.  Expose
# it as a public API, and provide it on systems that are lacking.
AC_DEFUN([gl_FUNC_GEN_TEMPNAME],
[
  gl_PREREQ_TEMPNAME
])

# Prerequisites of lib/tempname.c.
AC_DEFUN([gl_PREREQ_TEMPNAME],
[
  :
])