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>

Description:
Filtering of data through a subprocess.

Files:
lib/pipe-filter.h
lib/pipe-filter-gi.c
lib/pipe-filter-aux.h
lib/pipe-filter-aux.c

Depends-on:
spawn-pipe
wait-process
error
extern-inline
fcntl-h
gettext-h
stdbool
stdint
stdlib
sys_select
unistd

configure.ac:
AC_CHECK_FUNCS_ONCE([select])

Makefile.am:
lib_SOURCES += pipe-filter-gi.c pipe-filter-aux.c

Include:
"pipe-filter.h"

License:
GPL

Maintainer:
Paolo Bonzini, Bruno Haible