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:
Character set conversion of strings with error handling, uses iconv.

Files:
lib/striconveh.h
lib/striconveh.c
lib/iconveh.h

Depends-on:
stdbool
iconv
iconv_open
unistr/u8-prev
unistr/u8-mbtouc-unsafe
unistr/u8-mbtouc
unistr/u8-mbtoucr
unistr/u8-uctomb
strdup
c-strcase
c-strcaseeq
memmove

configure.ac:
if test $gl_cond_libtool = false; then
  gl_ltlibdeps="$gl_ltlibdeps $LTLIBICONV"
  gl_libdeps="$gl_libdeps $LIBICONV"
fi

Makefile.am:
lib_SOURCES += striconveh.h striconveh.c
if GL_COND_LIBTOOL
lib_LDFLAGS += $(LTLIBICONV)
endif

Include:
"striconveh.h"

Link:
$(LTLIBICONV) when linking with libtool, $(LIBICONV) otherwise

License:
LGPLv2+

Maintainer:
Bruno Haible