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/nap.h
tests/test-futimens.h
tests/test-lutimens.h
tests/test-utimens.h
tests/test-utimens-common.h
tests/test-fdutimensat.c
tests/macros.h

Depends-on:
fcntl-h
ignore-value
nanosleep
openat
timespec
dup
utimecmp

configure.ac:

Makefile.am:
TESTS += test-fdutimensat
check_PROGRAMS += test-fdutimensat
test_fdutimensat_LDADD = $(LDADD) $(LIB_CLOCK_GETTIME) \
  $(LIB_NANOSLEEP) @LIBINTL@