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:
Control of symbols exported by shared libraries.

Notice:
The value of $(CFLAG_VISIBILITY) needs to be added to the CFLAGS for the
compilation of all sources that make up the library.

Files:
m4/visibility.m4

Depends-on:

configure.ac:
gl_VISIBILITY

Makefile.am:
# The value of $(CFLAG_VISIBILITY) needs to be added to the CFLAGS for the
# compilation of all sources that make up the library. This line here does it
# only for the gnulib part of it. The developer is responsible for adding
# $(CFLAG_VISIBILITY) to the Makefile.ams of the other portions of the library.
AM_CFLAGS += $(CFLAG_VISIBILITY)

Include:

License:
unlimited

Maintainer:
Bruno Haible