Generate project version file for native builds

- The header file exposes a function that provides version information
   for native binaries

src/translator/CMakeLists.txt

@@ -1,3 +1,7 @@
+# Generate version file
+configure_file(${CMAKE_CURRENT_SOURCE_DIR}/project_version.h.in
+               ${CMAKE_CURRENT_SOURCE_DIR}/project_version.h @ONLY)
+
 add_library(bergamot-translator STATIC
     byte_array_util.cpp
     text_processor.cpp

src/translator/project_version.h.in

@@ -0,0 +1,19 @@
+#pragma once
+
+/*
+ * File project_version.h is generated using CMake. Do not modify project_version.h manually!
+ * Edit project_version.h.in file instead.
+ */
+
+#include <string>
+
+namespace marian {
+namespace bergamot {
+
+std::string bergamotBuildVersion() {
+    // e.g. v1.2.3-alpha.1.1+abc123d
+    return "@PROJECT_VERSION_STRING_FULL@";
+}
+
+} // namespace bergamot
+} // namespace marian