Integrate version numbering into autoconf

configure.in is now the master source for the package version number,
this propagates to src/platform.hpp (for zmq_version) and doc/Makefile.am
(for documentation generation) automagically.

configure.in

 #                                               -*- Autoconf -*-
 # Process this file with autoconf to produce a configure script.
 AC_PREREQ(2.61)
-AC_INIT([zeromq],[dev],[http://www.zeromq.org])
+#
+# Change the version number below after doing a public release.
+# The version in git should reflect the *next* version planned.
+# Version must be MAJOR.MINOR.PATCH otherwise things will break.
+#
+AC_INIT([zeromq],[0.0.0],[zeromq-dev@lists.zeromq.org])
+
 AC_CONFIG_AUX_DIR(config)
 AC_CONFIG_MACRO_DIR(config)
 AM_CONFIG_HEADER(src/platform.hpp)
 AM_INIT_AUTOMAKE(tar-ustar)
 
+# This defines PACKAGE_VERSION_... in src/platform.hpp
+PV_MAJOR=`echo $PACKAGE_VERSION | cut -d . -f 1`
+PV_MINOR=`echo $PACKAGE_VERSION | cut -d . -f 2`
+PV_PATCH=`echo $PACKAGE_VERSION | cut -d . -f 3`
+AC_DEFINE_UNQUOTED([PACKAGE_VERSION_MAJOR],[$PV_MAJOR],
+    [0MQ major version])
+AC_DEFINE_UNQUOTED([PACKAGE_VERSION_MINOR],[$PV_MINOR],
+    [0MQ minor version])
+AC_DEFINE_UNQUOTED([PACKAGE_VERSION_PATCH],[$PV_PATCH],
+    [0MQ patchlevel])
+# This lets us use PACKAGE_VERSION in Makefiles
+AC_SUBST(PACKAGE_VERSION)
+
+#
+# Libtool -version-info (ABI version)
+#
+# Currently 0.0.0 ("unstable"). Don't change this unless you 
+# know exactly what you're doing and have read and understand
+# http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
+#
 # libzmq -version-info
 LTVER="0:0:0"
 AC_SUBST(LTVER)

doc/Makefile.am

@@ -29,9 +29,11 @@ dist-hook : $(MAN_DOC) $(MAN_HTML)
 SUFFIXES=.html .txt .xml .1 .3 .7
 
 .txt.html:
-	asciidoc -d manpage -b xhtml11 -f asciidoc.conf $<
+	asciidoc -d manpage -b xhtml11 -f asciidoc.conf \
+		-azmq_version=@PACKAGE_VERSION@ $<
 .txt.xml:
-	asciidoc -d manpage -b docbook -f asciidoc.conf $<
+	asciidoc -d manpage -b docbook -f asciidoc.conf \
+		-azmq_version=@PACKAGE_VERSION@ $<
 .xml.1:
 	xmlto man $<
 .xml.3:

doc/asciidoc.conf

@@ -23,7 +23,7 @@ template::[header-declarations]
 <refentrytitle>{mantitle}</refentrytitle>
 <manvolnum>{manvolnum}</manvolnum>
 <refmiscinfo class="source">0MQ</refmiscinfo>
-<refmiscinfo class="version">2.0.0</refmiscinfo>
+<refmiscinfo class="version">{zmq_version}</refmiscinfo>
 <refmiscinfo class="manual">0MQ Manual</refmiscinfo>
 </refmeta>
 <refnamediv>

src/config.hpp

@@ -27,11 +27,6 @@ namespace zmq
 
     enum 
     {
-        //  Current version of 0MQ.
-        version_major = 0,
-        version_minor = 0,
-        version_patch = 0,
-
         //  Number of new messages in message pipe needed to trigger new memory
         //  allocation. Setting this parameter to 256 decreases the impact of
         //  memory allocation by approximately 99.6%

src/zmq.cpp

@@ -52,9 +52,9 @@
 
 void zmq_version (int *major_, int *minor_, int *patch_)
 {
-    *major_ = zmq::version_major;
-    *minor_ = zmq::version_minor;
-    *patch_ = zmq::version_patch;
+    *major_ = PACKAGE_VERSION_MAJOR;
+    *minor_ = PACKAGE_VERSION_MINOR;
+    *patch_ = PACKAGE_VERSION_PATCH;
 }
 
 const char *zmq_strerror (int errnum_)