Mercurial > gnulib
view m4/gc.m4 @ 37246:5cfb3a67238d
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>
author | Eric Blake <eblake@redhat.com> |
---|---|
date | Tue, 03 Dec 2013 10:34:13 -0700 |
parents | 135e82dafbea |
children | 5309e7f8551d |
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# gc.m4 serial 9 dnl Copyright (C) 2005-2013 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. AC_DEFUN([gl_GC], [ LIB_CRYPTO= AC_SUBST([LIB_CRYPTO]) AC_ARG_WITH([libgcrypt], AS_HELP_STRING([--with-libgcrypt], [use libgcrypt for low-level crypto]), libgcrypt=$withval, libgcrypt=no) if test "$libgcrypt" != no; then AC_LIB_HAVE_LINKFLAGS([gcrypt], [gpg-error], [ #include <gcrypt.h> /* GCRY_MODULE_ID_USER was added in 1.4.4 and gc-libgcrypt.c will fail on startup if we don't have 1.4.4 or later, so test for it early. */ #if !defined GCRY_MODULE_ID_USER error too old libgcrypt #endif ]) fi ])