Mercurial > gnulib
view m4/strftime.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 | c741bc27922a |
| children | 344018b6e5d7 |
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# serial 33 # Copyright (C) 1996-1997, 1999-2007, 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. # Written by Jim Meyering and Paul Eggert. AC_DEFUN([gl_FUNC_GNU_STRFTIME], [ gl_FUNC_STRFTIME ]) # These are the prerequisite macros for GNU's strftime.c replacement. AC_DEFUN([gl_FUNC_STRFTIME], [ # This defines (or not) HAVE_TZNAME and HAVE_TM_ZONE. AC_REQUIRE([AC_STRUCT_TIMEZONE]) AC_REQUIRE([gl_TM_GMTOFF]) AC_CHECK_FUNCS_ONCE([tzset]) AC_DEFINE([my_strftime], [nstrftime], [Define to the name of the strftime replacement function.]) ])