build: Include a copy of Nix's libstore and daemon; build it.

* configure.ac: Call `AC_USE_SYSTEM_EXTENSIONS', and
  `GUIX_SYSTEM_TYPE'.  Add `--with-store-dir' option, and substitute
  `storedir'.  Include `config-daemon.ac'.
* config-daemon.ac: New file.
* Makefile.am [BUILD_DAEMON]: Include `daemon.am'.
* daemon.am: New file.
* m4/guix.m4 (GUIX_SYSTEM_TYPE): New macro.

* nix/libutil/gcrypt-hash.cc, nix/libutil/gcrypt-hash.hh,
  nix/libutil/md5.h, nix/libutil/sha1.h, nix/libutil/sha256.h,
  nix/nix-daemon/guix-daemon.cc, nix/nix-daemon/shared.hh: New files.

1 files changed, 37 insertions, 0 deletions

diff --git a/nix/nix-daemon/shared.hh b/nix/nix-daemon/shared.hh
new file mode 100644
index 0000000000..a03c09c036
--- /dev/null
+++ b/nix/nix-daemon/shared.hh
@@ -0,0 +1,37 @@
+/* Guix --- Nix package management from Guile.         -*- coding: utf-8 -*-
+   Copyright (C) 2012  Ludovic Courtès <ludo@gnu.org>
+
+   This file is part of Guix.
+
+   Guix is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or (at
+   your option) any later version.
+
+   Guix is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with Guix.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* Replacement for Nix's libmain/shared.hh.  */
+
+#pragma once
+
+#include <string>
+
+#include <stdlib.h>
+#include <signal.h>
+
+static inline void
+showManPage (const char *name)
+{
+  /* This idea is evil.  Abort.  */
+  abort ();
+}
+
+extern volatile ::sig_atomic_t blockInt;
+
+extern char **argvSaved;