DOC: fill and install a VERSION file

CMakeLists.txt

@@ -91,6 +91,8 @@ set(OTB_VERSION_MINOR "6")
 set(OTB_VERSION_PATCH "0")
 set(OTB_VERSION_STRING "${OTB_VERSION_MAJOR}.${OTB_VERSION_MINOR}.${OTB_VERSION_PATCH}")
 
+string(TIMESTAMP OTB_BUILD_TIMESTAMP)
+
 if(NOT OTB_INSTALL_RUNTIME_DIR)
   set(OTB_INSTALL_RUNTIME_DIR bin)
 endif()
@@ -337,6 +339,10 @@ install(FILES ${OTB_FIND_PACKAGE_SCRIPTS} DESTINATION ${OTB_INSTALL_PACKAGE_DIR}
 # install(FILES "LICENSE" "NOTICE" "README.txt" DESTINATION ${OTB_INSTALL_DOC_DIR} COMPONENT Runtime)
 install(FILES "LICENSE" DESTINATION ${OTB_INSTALL_DOC_DIR} COMPONENT Runtime)
 
+# Configure and install VERSION file
+configure_file(VERSION VERSION @ONLY)
+install(FILES ${OTB_BINARY_DIR}/VERSION DESTINATION ${OTB_INSTALL_DOC_DIR} COMPONENT Runtime)
+
 if(BUILD_TESTING)
   add_subdirectory(Utilities/InstallTest)
 endif()

VERSION

+OTB Version: @OTB_VERSION_STRING@
+Build Date: @OTB_BUILD_TIMESTAMP@
+@OTB_GIT_STATUS_MESSAGE@