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:
accept4() function: accept a connection on a socket, with specific opening
flags.

Files:
lib/accept4.c
m4/accept4.m4

Depends-on:
sys_socket
accept
fcntl-h
binary-io
extensions
msvc-nothrow

configure.ac:
gl_FUNC_ACCEPT4
gl_SYS_SOCKET_MODULE_INDICATOR([accept4])

Makefile.am:
lib_SOURCES += accept4.c

Include:
<sys/socket.h>

Link:
$(LIBSOCKET)

License:
LGPL

Maintainer:
Bruno Haible, Simon Josefsson