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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 143cea48b4d3
children
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Description:
strtoumax() function: convert string to 'uintmax_t'.

Files:
lib/strtoimax.c
lib/strtoumax.c
m4/longlong.m4
m4/strtoumax.m4

Depends-on:
inttypes-incomplete
verify          [test $HAVE_DECL_STRTOUMAX = 0 || test $REPLACE_STRTOUMAX = 1]
stdint          [test $HAVE_DECL_STRTOUMAX = 0 || test $REPLACE_STRTOUMAX = 1]
strtoull        [{ test $HAVE_DECL_STRTOUMAX = 0 || test $REPLACE_STRTOUMAX = 1; } && test $ac_cv_type_unsigned_long_long_int = yes]

configure.ac:
gl_FUNC_STRTOUMAX
if test $HAVE_DECL_STRTOUMAX = 0 || test $REPLACE_STRTOUMAX = 1; then
  AC_LIBOBJ([strtoumax])
  gl_PREREQ_STRTOUMAX
fi
gl_INTTYPES_MODULE_INDICATOR([strtoumax])

Makefile.am:

Include:
<inttypes.h>

License:
LGPL

Maintainer:
Paul Eggert