doc: Mention that --ccache-skip currently does not mean "skip hashing option"

diff --git a/MANUAL.txt b/MANUAL.txt
index f15d6667e6e111bda3ec4eedcf9b1e8d48e292ca..f38bd9d0f4ce29b21dcc8150600ce37128efff8a 100644 (file)
--- a/MANUAL.txt
+++ b/MANUAL.txt
@@ -151,7 +151,10 @@ Extra options
 When run as a compiler, ccache usually just takes the same command line options
 as the compiler you are using. The only exception to this is the option
 *--ccache-skip*. That option can be used to tell ccache to avoid interpreting
-the next option in any way and to pass it along to the compiler as-is.
+the next option in any way and to pass it along to the compiler as-is. *Note*:
+*--ccache-skip* currently only tells ccache not to interpret the next option as
+a special compiler option -- the option will still be included in the direct
+mode hash.
 
 The reason this can be important is that ccache does need to parse the command
 line and determine what is an input filename and what is a compiler option, as