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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 65fad712b8b0
children
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Description:
Hierarchical processing of command line arguments.

Notice:
If you are using GNU gettext version 0.16.1 or older, add the following options
to XGETTEXT_OPTIONS in your po/Makevars:
  --flag=argp_error:2:c-format --flag=argp_failure:4:c-format

Files:
lib/argp.h
lib/argp-ba.c
lib/argp-eexst.c
lib/argp-fmtstream.c
lib/argp-fmtstream.h
lib/argp-fs-xinl.c
lib/argp-help.c
lib/argp-namefrob.h
lib/argp-parse.c
lib/argp-pin.c
lib/argp-pv.c
lib/argp-pvh.c
lib/argp-xinl.c
m4/argp.m4

Depends-on:
alloca
dirname-lgpl
extern-inline
getopt-gnu
strchrnul
sysexits
malloc-gnu
mempcpy
strndup
strcase
extensions
vsnprintf
sleep
stdalign
strerror
memchr
memmove

configure.ac:
gl_ARGP
m4_ifdef([AM_XGETTEXT_OPTION],
  [AM_][XGETTEXT_OPTION([--flag=argp_error:2:c-format])
   AM_][XGETTEXT_OPTION([--flag=argp_failure:4:c-format])])

Makefile.am:
lib_SOURCES += argp.h argp-ba.c argp-eexst.c \
           argp-fmtstream.c argp-fmtstream.h argp-fs-xinl.c argp-help.c \
           argp-namefrob.h argp-parse.c argp-pin.c argp-pv.c argp-pvh.c \
           argp-xinl.c

Include:
"argp.h"

License:
LGPL

Maintainer:
Sergey Poznyakoff, glibc