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:
Return the canonical absolute name of a given file.

Files:
lib/canonicalize.h
lib/canonicalize.c
m4/canonicalize.m4
m4/double-slash-root.m4

Depends-on:
areadlink-with-size
errno
extensions
file-set
hash-triple
lstat
memmove
nocrash
pathmax
sys_stat
xalloc
xgetcwd

configure.ac:
gl_FUNC_CANONICALIZE_FILENAME_MODE
gl_MODULE_INDICATOR([canonicalize])
gl_MODULE_INDICATOR_FOR_TESTS([canonicalize])
gl_STDLIB_MODULE_INDICATOR([canonicalize_file_name])

Makefile.am:
lib_SOURCES += canonicalize.c

Include:
"canonicalize.h"

License:
GPL

Maintainer:
Jim Meyering