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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>
author Eric Blake <eblake@redhat.com>
date Tue, 03 Dec 2013 10:34:13 -0700
parents 33b8797bd9e2
children 326ae329c003
line wrap: on
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The following packages are needed by maintainers for using
'gnulib-tool'.  In general, Gnulib prefers the latest stable
version of each package, but in some cases it also supports
older versions; this caters to commonly-used software
distributions that may lag behind the latest stable package.
Support for older versions is not guaranteed, though, and
the version numbers in the following list may be incremented
at any time.

* A C runtime, compiler, linker, etc.
  + Mandatory. Using the platform's native 'cc' gives good portability
    exposure, but you can also use GCC 2.95 or newer.
  + GCC Homepage:
    http://gcc.gnu.org/
  + Download:
    http://ftp.gnu.org/gnu/gcc/
    ftp://ftp.gnu.org/gnu/gcc/

* A 'make' utility.
  + Mandatory. Using the platform's native 'make' gives good portability
    exposure for in-tree builds, but VPATH builds require GNU Make 3.79.1 or
    newer.
  + GNU Make Homepage:
    http://www.gnu.org/software/make/
  + Download:
    http://ftp.gnu.org/gnu/make/
    ftp://ftp.gnu.org/gnu/make/

* GNU M4 1.4.5 or newer.
  + 1.4.5 or newer is mandatory, but 1.4.9 or newer is recommended.
  + Homepage:
    http://www.gnu.org/software/m4/
  + Download:
    http://ftp.gnu.org/gnu/m4/
    ftp://ftp.gnu.org/gnu/m4/

* Autoconf 2.59 or newer.
  + Mandatory.
  + Homepage:
    http://www.gnu.org/software/autoconf/
  + Download:
    http://ftp.gnu.org/gnu/autoconf/
    ftp://ftp.gnu.org/gnu/autoconf/

* Automake 1.9.6 or newer.
  + Mandatory.
  + Homepage:
    http://www.gnu.org/software/automake/
  + Download:
    http://ftp.gnu.org/gnu/automake/
    ftp://ftp.gnu.org/gnu/automake/

* A shell
  + Mandatory. Using the platform's native 'sh' gives good portability
    exposure, but you can also use Bash.
  + Homepage:
    http://www.gnu.org/software/bash/
  + Download:
    http://ftp.gnu.org/gnu/bash/
    ftp://ftp.gnu.org/gnu/bash/

* Core POSIX utilities, including:
    [ basename cat chgrp chmod chown cp dd echo expand expr
    false hostname install kill ln ls md5sum mkdir mkfifo
    mknod mv printenv pwd rm rmdir sleep sort tee test touch
    true uname
  + Mandatory. Using the platform's native utilities gives good portability
    exposure, but you can also use GNU coreutils.
  + Homepage:
    http://www.gnu.org/software/coreutils/
  + Download:
    http://ftp.gnu.org/gnu/coreutils/
    ftp://ftp.gnu.org/gnu/coreutils/

* The comparison utilities 'cmp' and 'diff'.
  + Mandatory. Using the platform's native utilities gives good portability
    exposure, but you can also use GNU diffutils.
  + Homepage:
    http://www.gnu.org/software/diffutils/
  + Download:
    http://ftp.gnu.org/gnu/diffutils/
    ftp://ftp.gnu.org/gnu/diffutils/

* The patch utility 'patch'.
  + Mandatory if you use gnulib-local diffs. Using the platform's native
    utilities gives good portability exposure, but you can also use GNU
    patch.
  + Homepage:
    http://www.gnu.org/software/patch/
  + Download:
    http://ftp.gnu.org/gnu/patch/
    ftp://ftp.gnu.org/gnu/patch/

* Grep.
  + Mandatory. Using the platform's native grep gives good portability
    exposure, but you can also use GNU grep.
  + Homepage:
    http://www.gnu.org/software/grep/
  + Download:
    http://ftp.gnu.org/gnu/grep/
    ftp://ftp.gnu.org/gnu/grep/

* GNU gettext.
  + If your project wants to follow GNU Coding Standards:
    + Always use the newest available gettext release, see
      <http://www.gnu.org/software/gnulib/manual/html_node/gettextize-and-autopoint.html>.
    + Use the 'gettext' module.
  + If your project cares more about ease of development on older platforms:
    + gettext 0.17 or newer.
    + Use the 'gettext-h' module.
  + Recommended.
    Needed if you use modules that use internationalization (many do).
  + Homepage:
    http://www.gnu.org/software/gettext/
  + Download:
    http://ftp.gnu.org/gnu/gettext/
    ftp://ftp.gnu.org/gnu/gettext/

* Bison 2.0 or newer.
  + Recommended.
    Needed if you use the 'parse-datetime' module.
  + Homepage:
    http://www.gnu.org/software/bison/
  + Download:
    http://ftp.gnu.org/gnu/bison/
    ftp://ftp.gnu.org/gnu/bison/

* GNU gperf 3.0.1 or newer.
  + Recommended.
    Needed if you use the 'iconv_open' module.
  + Homepage:
    http://www.gnu.org/software/gperf/
  + Download:
    http://ftp.gnu.org/gnu/gperf/
    ftp://ftp.gnu.org/gnu/gperf/

* Texinfo 4.6 or newer.
  + Recommended.
    Needed if you use modules that include documentation.
  + Homepage:
    http://www.gnu.org/software/texinfo/
  + Download:
    http://ftp.gnu.org/gnu/texinfo/
    ftp://ftp.gnu.org/gnu/texinfo/

* GNU sed.
  + Recommended.
    Needed on platforms where the vendor's 'sed' program is too buggy.
  + Homepage:
    http://www.gnu.org/software/sed/
  + Download:
    http://ftp.gnu.org/gnu/sed/
    ftp://ftp.gnu.org/gnu/sed/

* GNU libtool 1.5.22 or newer.
  + Optional.
    Needed if you want to invoke gnulib-tool with option --libtool.
    libtool 2.2.x or newer is needed if you want to invoke gnulib-tool
    with options --create-testdir/--test  and --libtool.
  + Homepage:
    http://www.gnu.org/software/libtool/
  + Download:
    http://ftp.gnu.org/gnu/libtool/
    ftp://ftp.gnu.org/gnu/libtool/