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>

Files:
tests/test-cbrtl-ieee.c
tests/test-cbrt-ieee.h
tests/minus-zero.h
tests/infinity.h
tests/nan.h
tests/macros.h

Depends-on:
isnanl-nolibm
float
signbit

configure.ac:

Makefile.am:
TESTS += test-cbrtl-ieee
check_PROGRAMS += test-cbrtl-ieee
test_cbrtl_ieee_LDADD = $(LDADD) @CBRTL_LIBM@