From cfd4e2c311e17bae644372f6c87da24446bf09f7 Mon Sep 17 00:00:00 2001
From: Ralph Giles <giles@mozilla.com>
Date: Mon, 1 Oct 2012 11:30:41 -0700
Subject: [PATCH] Set the autoconf version from git.

AC_INIT requires that the version string passed in be 'static'
so we can't use the output of a shell invocation. However, it
can be computed by an m4 shell invocation. This is what autoconf
itself does to embed its git version number in PACKAGE_VERSION.

Doing this necessitates the 'echo -n' in git-version.sh. Make
is smart enough to strip the trailing newline, but AC_INIT is
not. We must also add -f to autoreconf. Otherwise, autogen.sh
will only update configure when configure.ac changes, even if
the output of git-version.sh has changed.

This is still not ideal, since it runs at autogen.sh time, not
at 'make' time, which is what we want. This seems to be a limitation
of an upcoming automake release, which removes the old style
with PACKAGE and VERSION set by shell variables.
---
 autogen.sh         | 2 +-
 configure.ac       | 4 +++-
 doc/git-version.sh | 2 +-
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/autogen.sh b/autogen.sh
index 58d140a..ed71bc6 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -13,4 +13,4 @@ test -z "$srcdir" && srcdir=.
 cd "$srcdir"
 
 echo "Updating build configuration files for $package, please wait...."
-autoreconf -is
+autoreconf -isf
diff --git a/configure.ac b/configure.ac
index e1f3d21..52c5210 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,6 @@
-AC_INIT([opusfile], [0.0])
+# autoconf source script for generating configure
+
+AC_INIT([opusfile], m4_esyscmd([doc/git-version.sh]))
 
 AC_USE_SYSTEM_EXTENSIONS
 AC_SYS_LARGEFILE
diff --git a/doc/git-version.sh b/doc/git-version.sh
index 4475454..f0d2576 100755
--- a/doc/git-version.sh
+++ b/doc/git-version.sh
@@ -9,4 +9,4 @@ else
   VERSION=${GIT_VERSION}
 fi
 
-echo ${VERSION}
+echo -n ${VERSION}
-- 
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