[PATCH] build: avoid unneeded spawn-pipe gnulib module

[Pádraig Brady]

I noticed this uclibc build issue mentioned at:
http://permalink.gmane.org/gmane.comp.lib.uclibc.buildroot/73294

I sent a separate patch to gnulib to fix the direct issue there,
however I was surprised that we were using the spawn-pipe module at all.

It seems since coreutils 8.16 we've pulled in these dependencies:

  pipe
    spawn-pipe
      posix_spawnp
        posix_spawnp-internal
          spawn

The change to add "pipe" was triggered by this GNULIB_POSIXCHECK result:
 "call to 'pipe' declared with attribute warning: pipe is unportable -
  use gnulib module pipe-posix for portability [-Werror]"

So I think we really only need to include pipe-posix instead,
which is what the attached patch does.

The build error is a bit surprising as it suggests that uclibc builds
are broken since 8.16? Or maybe uclibc has recently moved posix_spawn() -lrt?
In any case these two fixes should avoid the issue for future coreutils 
releases.

thanks,
Pádraig.

>From 01a37162ea07e855011389f66053ee430053911a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C3=A1draig=20Brady?= <p...@draigbrady.com>
Date: Tue, 14 Jan 2014 18:23:44 +0000
Subject: [PATCH] build: avoid unneeded spawn-pipe gnulib module

* bootstrap.conf: Reference the used pipe-posix module
rather than the uneeded and larger spawn-pipe module,
which the pipe module was the deprecated equivalent of.
Note the spawn-pipe module had build issues on uclibc,
which is addressed in a separate gnulib patch.
---
 bootstrap.conf |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/bootstrap.conf b/bootstrap.conf
index d3db84b..98e83bb 100644
--- a/bootstrap.conf
+++ b/bootstrap.conf
@@ -177,7 +177,7 @@ gnulib_modules="
   pathmax
   perl
   physmem
-  pipe
+  pipe-posix
   posix-shell
   posixtm
   posixver
-- 
1.7.7.6