Setting this avoids premature cache object eviction during large builds.

Signed-off-by: Zachary T Welch <zach@...>
---
meta/classes/ccache.bbclass | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/meta/classes/ccache.bbclass b/meta/classes/ccache.bbclass
index 4532894c57..913304ab35 100644
--- a/meta/classes/ccache.bbclass
+++ b/meta/classes/ccache.bbclass
@@ -12,7 +12,12 @@
# Set CCACHE_TOP_DIR to a shared dir
# CCACHE_TOP_DIR = /path/to/shared_ccache/
#
-# - TO debug ccahe
+# - Adjust the ccache size limit to avoid overflow during large builds:
+# export CCACHE_MAXSIZE = "100G"
+# To find a reasonable limit, set this limit to 0 (no limit), then
+# observe how large the ccache directory grows.
+#
+# - To debug ccache:
# export CCACHE_DEBUG = "1"
# export CCACHE_LOGFILE = "${CCACHE_DIR}/logfile.log"
# And also set PARALLEL_MAKE = "-j 1" to get make the log in order
--
2.25.1