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:
recvfrom() function: receive (read) data from a potentially unconnected socket.

Files:
lib/recvfrom.c
lib/w32sock.h

Depends-on:
sys_socket
socketlib
errno           [test "$ac_cv_header_winsock2_h" = yes]
getpeername     [test "$ac_cv_header_winsock2_h" = yes]
msvc-nothrow    [test "$ac_cv_header_winsock2_h" = yes]

configure.ac:
AC_REQUIRE([gl_HEADER_SYS_SOCKET])
if test "$ac_cv_header_winsock2_h" = yes; then
  AC_LIBOBJ([recvfrom])
fi
gl_SYS_SOCKET_MODULE_INDICATOR([recvfrom])

Makefile.am:

Include:
<sys/socket.h>

Link:
$(LIBSOCKET)

License:
LGPLv2+

Maintainer:
Paolo Bonzini, Simon Josefsson