Generate cisstRevision.h only if content has changed. Use temporary f…

…ile and then CMake -E copy_if_different
jhu-cisst · Feb 5, 2015 · 3ae04a1 · 3ae04a1
1 parent 6fb8a64
commit 3ae04a1
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/cmake/cisstGenerateRevision.cmake.in b/cmake/cisstGenerateRevision.cmake.in
@@ -37,4 +37,9 @@ endif (GIT_FOUND)
 message ("Found Git revision: ${CISST_GIT_DESCRIBE}")
 
 configure_file ("${CISST_REVISION_HEADER_SRC}"
-                "${CISST_REVISION_HEADER}")
+                "${CMAKE_CURRENT_SOURCE_DIR}/cisstRevision.h.tmp")
+
+execute_process (COMMAND
+                 ${CMAKE_COMMAND} -E copy_if_different
+                 "${CMAKE_CURRENT_SOURCE_DIR}/cisstRevision.h.tmp"
+                 "${CISST_REVISION_HEADER}")