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:
A <stdalign.h> that nearly conforms to ISO C11 and C++11.

Files:
lib/stdalign.in.h
m4/stdalign.m4

Depends-on:

configure.ac:
gl_STDALIGN_H

Makefile.am:
BUILT_SOURCES += $(STDALIGN_H)

# We need the following in order to create <stdalign.h> when the system
# doesn't have one that works.
if GL_GENERATE_STDALIGN_H
stdalign.h: stdalign.in.h $(top_builddir)/config.status
	$(AM_V_GEN)rm -f $@-t $@ && \
	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
	  cat $(srcdir)/stdalign.in.h; \
	} > $@-t && \
	mv $@-t $@
else
stdalign.h: $(top_builddir)/config.status
	rm -f $@
endif
MOSTLYCLEANFILES += stdalign.h stdalign.h-t

Include:
<stdalign.h>

License:
LGPLv2+

Maintainer:
Paul Eggert, Bruno Haible