lib: Add new header <openvswitch/version.h> to versioning info

Exposes the package version as string and the library versioning
as numeric macro.

OVS_LIB_VERSION may be used to check for a particular version of
the interface.

OVS_LIB_REVISION and OVS_LIB_AGE exist to map a set of installed
headers to a particular shared library instance.

Signed-off-by: Thomas Graf <[email protected]>
Signed-off-by: Ben Pfaff <[email protected]>

configure.ac

@@ -176,6 +176,7 @@ AC_CONFIG_FILES(lib/libopenvswitch.pc)
 AC_CONFIG_FILES(lib/libsflow.pc)
 AC_CONFIG_FILES(ofproto/libofproto.pc)
 AC_CONFIG_FILES(ovsdb/libovsdb.pc)
+AC_CONFIG_FILES(include/openvswitch/version.h)
 
 dnl This makes sure that include/openflow gets created in the build directory.
 AC_CONFIG_COMMANDS([include/openflow/openflow.h.stamp])

include/openvswitch/.gitignore

@@ -0,0 +1 @@
+/version.h

include/openvswitch/automake.mk

@@ -1,4 +1,5 @@
 openvswitchincludedir = $(includedir)/openvswitch
 openvswitchinclude_HEADERS = \
-	include/openvswitch/types.h
+	include/openvswitch/types.h \
+	include/openvswitch/version.h
 

include/openvswitch/version.h.in

@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2014 Nicira, Inc.
+ * Copyright (c) 2014 Cisco Systems, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef OPENVSWITCH_VERSION_H
+#define OPENVSWITCH_VERSION_H 1
+
+#define OVS_PACKAGE_STRING  "@PACKAGE_STRING@"
+#define OVS_PACKAGE_VERSION "@PACKAGE_VERSION@"
+
+#define OVS_LIB_VERSION     @LT_CURRENT@
+#define OVS_LIB_REVISION    @LT_REVISION@
+#define OVS_LIB_AGE         @LT_AGE@
+
+#endif /* openvswitch/version.h */