INSTALL.md: Note that Clang and ccache aren't completely compatible.

CC: Russell Bryant <rbryant@redhat.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Russell Bryant <rbryant@redhat.com>

diff --git a/INSTALL.md b/INSTALL.md
index b2b0cbb..3762e00 100644 (file)
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -259,6 +259,10 @@ Building the Sources
    For improved warnings if you installed "sparse" (see "Prerequisites"),
    add C=1 to the command line.
 
+   Some versions of Clang and ccache are not completely compatible.
+   If you see unusual warnings when you use both together, consider
+   disabling ccache for use with Clang.
+
 2. Consider running the testsuite.  Refer to "Running the Testsuite"
    below, for instructions.