add version info the library headers

Makefile.am

@@ -260,7 +260,8 @@ dist_thebear_theme_DATA = \
 pubinclude_HEADERS = \
 	render/render.h \
 	render/theme.h \
-	parser/parse.h
+	parser/parse.h \
+	version.h
 
 nodist_pkgconfig_DATA = \
 	render/obrender-3.0.pc \

configure.ac

@@ -113,6 +113,7 @@ AC_CONFIG_FILES([
   po/Makefile.in
   render/obrender-3.0.pc
   parser/obparser-3.0.pc
+  version.h
 ])
 AC_OUTPUT
 

parser/parse.h

@@ -19,6 +19,8 @@
 #ifndef __parse_h
 #define __parse_h
 
+#include "version.h"
+
 #include <libxml/parser.h>
 #include <glib.h>
 

render/render.h

@@ -20,6 +20,8 @@
 #ifndef __render_h
 #define __render_h
 
+#include "version.h"
+
 #include <X11/Xlib.h> /* some platforms dont include this as needed for Xft */
 #define _XFT_NO_COMPAT_ /* no Xft 1 API */
 #include <X11/Xft/Xft.h>

version.h.in

@@ -0,0 +1,15 @@
+#ifndef ob__version_h
+#define ob__version_h
+
+#define OB_MAJOR_VERSION @OB_MAJOR_VERSION@
+#define OB_MINOR_VERSION @OB_MINOR_VERSION@
+#define OB_MICRO_VERSION @OB_MICRO_VERSION@
+#define OB_VERSION OB_MAJOR_VERSION.OB_MINOR_VERSION.OB_MICRO_VERSION
+
+#define OB_CHECK_VERSION(major,minor,micro) \
+    (OB_MAJOR_VERSION > (major) || \
+     (OB_MAJOR_VERSION == (major) && OB_MINOR_VERSION > (minor)) || \
+     (OB_MAJOR_VERSION == (major) && OB_MINOR_VERSION == (minor) && \
+      OB_MICRO_VERSION >= (micro)))
+
+#endif