Add a version number to Cycles standalone

Now Cycles has its own versioning, that is mainly interesting for external projects, which integrate the engine.

We start with version 1.7.0. Reasons for that:

* The engine is too mature for a 1.0 release.
* We assume that Cycles inside of Blender 2.61 was version 0.1. We count upwards in 0.1 steps, therefore Cycles inside of Blender 2.77 would be 1.7.

We use a common versioning scheme here, with 3 decimals for the major, minor and patch level.

At the moment cycles --version can be used to display the version, easy to parse for external projects. The info will be added to the UI later aswell.

1 files changed, 44 insertions, 0 deletions

diff --git a/intern/cycles/util/util_version.h b/intern/cycles/util/util_version.h
new file mode 100644
index 00000000000..19847410e51
--- /dev/null
+++ b/intern/cycles/util/util_version.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2011-2016 Blender Foundation
+ *
+ * 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 __UTIL_VERSION_H__
+#define __UTIL_VERSION_H__
+
+/* Cycles version number */
+
+#include <util_string.h>
+
+CCL_NAMESPACE_BEGIN
+
+#define CYCLES_VERSION_MAJOR	1
+#define CYCLES_VERSION_MINOR	7
+#define CYCLES_VERSION_PATCH	0
+
+/* Create string number, like "1.7.0" */
+string cycles_version_number()
+{
+	stringstream ss;
+	ss << CYCLES_VERSION_MAJOR << "."
+       << CYCLES_VERSION_MINOR << "."
+       << CYCLES_VERSION_PATCH;
+
+	return ss.str();
+}
+
+CCL_NAMESPACE_END
+
+#endif /* __UTIL_VERSION_H__ */
+