[perl-GStreamer-Interfaces] Add version checking facilities

[Torsten Schönfeld <tsch src gnome org>]

commit 8444604a22f2c913240b36b847fa3b6e3972aae0
Author: Torsten Schönfeld <kaffeetisch gmx de>
Date:   Sat Mar 20 13:48:10 2010 +0100

    Add version checking facilities
    
    Generate version checking macro GST_INTERFACES_CHECK_VERSION and wrap it
    as GStreamer::Interfaces->CHECK_VERSION.

 Makefile.PL         |    5 +++++
 gstinterfacesperl.h |    1 +
 xs/GstInterfaces.xs |   12 ++++++++++++
 3 files changed, 18 insertions(+), 0 deletions(-)
---
diff --git a/Makefile.PL b/Makefile.PL
index 1ff590f..9a97645 100644
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -57,6 +57,11 @@ mkdir 'build', 0777;
 Glib::CodeGen->parse_maps('gstinterfacesperl');
 Glib::CodeGen->write_boot(ignore => qr/^GStreamer::Interfaces$/);
 
+ExtUtils::PkgConfig->write_version_macros (
+  "build/gstinterfacesperl-version.h",
+  "gstreamer-plugins-base-0.10" => "GST_INTERFACES",
+);
+
 my $gst = ExtUtils::Depends->new('GStreamer::Interfaces', 'GStreamer');
 $gst->set_inc($pkgcfg{cflags});
 $gst->set_libs($pkgcfg{libs} . ' -lgstinterfaces-0.10');
diff --git a/gstinterfacesperl.h b/gstinterfacesperl.h
index c466699..71422e6 100644
--- a/gstinterfacesperl.h
+++ b/gstinterfacesperl.h
@@ -26,6 +26,7 @@
 #include <gst/interfaces/propertyprobe.h>
 #include <gst/interfaces/xoverlay.h>
 
+#include "gstinterfacesperl-version.h"
 #include "gstinterfacesperl-autogen.h"
 
 #endif /* _GSTINTERFACES2PERL_H_ */
diff --git a/xs/GstInterfaces.xs b/xs/GstInterfaces.xs
index c796af4..fb5009d 100644
--- a/xs/GstInterfaces.xs
+++ b/xs/GstInterfaces.xs
@@ -25,3 +25,15 @@ MODULE = GStreamer::Interfaces	PACKAGE = GStreamer::Interfaces
 BOOT:
 #include "register.xsh"
 #include "boot.xsh"
+
+=for apidoc __hide__
+=cut
+bool
+CHECK_VERSION (class, major, minor, micro)
+	int major
+	int minor
+	int micro
+    CODE:
+	RETVAL = GST_INTERFACES_CHECK_VERSION (major, minor, micro);
+    OUTPUT:
+	RETVAL