Config.in: Document BR2_CCACHE_DIR override

This variable, like BR2_DL_DIR, is designed to be overridable from the
environment.  Unlike BR2_DL_DIR, it is not documented as such in the
Config.in help text.  Do so now.

Signed-off-by: Trent Piepho <tpiepho@impinj.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/Config.in b/Config.in
index 037ea2265b..a74b24ae45 100644
--- a/Config.in
+++ b/Config.in
@@ -332,6 +332,9 @@ config BR2_CCACHE_DIR
 	default "$(HOME)/.buildroot-ccache"
 	help
 	  Where ccache should store cached files.
+	  If the Linux shell environment has defined the BR2_CCACHE_DIR
+	  environment variable, then this overrides this configuration
+	  item.
 
 config BR2_CCACHE_INITIAL_SETUP
 	string "Compiler cache initial setup"