Update build system (automake, autoconf, libtool)

Unfortunately this patch is hard to split up into smaller chunks. Our build
system and the associated automake/autoconf/libtool macros has been left
untouched for a while, and could use a refresher.

* Upgrade ltmain.sh to the latest version
* Move away from a huge acinclude.m4 directory to using individual files in
  the m4/ subdirectory, suggested by upstream automake documentation
* Update all macros to their latest available version
* Adjust Makefile.am and autogen.sh to accommodate m4/ subdirectory

Signed-off-by: Dan McGee <dan@archlinux.org>

1 files changed, 23 insertions, 0 deletions

diff --git a/m4/ltversion.m4 b/m4/ltversion.m4
new file mode 100644
index 00000000..9c7b5d41
--- /dev/null
+++ b/m4/ltversion.m4
@@ -0,0 +1,23 @@
+# ltversion.m4 -- version numbers			-*- Autoconf -*-
+#
+#   Copyright (C) 2004 Free Software Foundation, Inc.
+#   Written by Scott James Remnant, 2004
+#
+# This file is free software; the Free Software Foundation gives
+# unlimited permission to copy and/or distribute it, with or without
+# modifications, as long as this notice is preserved.
+
+# @configure_input@
+
+# serial 3293 ltversion.m4
+# This file is part of GNU Libtool
+
+m4_define([LT_PACKAGE_VERSION], [2.4])
+m4_define([LT_PACKAGE_REVISION], [1.3293])
+
+AC_DEFUN([LTVERSION_VERSION],
+[macro_version='2.4'
+macro_revision='1.3293'
+_LT_DECL(, macro_version, 0, [Which release of libtool.m4 was used?])
+_LT_DECL(, macro_revision, 0)
+])