1 files changed, 2 insertions, 1 deletions
diff --git a/Source/cmFileCommand.h b/Source/cmFileCommand.h
index b4aa903..a0862ec 100644
--- a/Source/cmFileCommand.h
+++ b/Source/cmFileCommand.h
@@ -89,7 +89,8 @@ public:
       "       [TIMEOUT timeout] [STATUS status] [LOG log] [SHOW_PROGRESS])\n"
       "WRITE will write a message into a file called 'filename'. It "
       "overwrites the file if it already exists, and creates the file "
-      "if it does not exist.\n"
+      "if it does not exist. (If the file is a build input, use "
+      "configure_file to update the file only when its content changes.)\n"
       "APPEND will write a message into a file same as WRITE, except "
       "it will append it to the end of the file\n"
       "READ will read the content of a file and store it into the "