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-rw-r--r--README9
1 files changed, 9 insertions, 0 deletions
diff --git a/README b/README
index 6fe1e0fc2..791677779 100644
--- a/README
+++ b/README
@@ -655,6 +655,15 @@ The following options need to be configured:
to get the character out. Baud rates will need to default
to something sensible.
+- Safe printf() functions
+ Define CONFIG_SYS_VSNPRINTF to compile in safe versions of
+ the printf() functions. These are defined in
+ include/vsprintf.h and include snprintf(), vsnprintf() and
+ so on. Code size increase is approximately 300-500 bytes.
+ If this option is not given then these functions will
+ silently discard their buffer size argument - this means
+ you are not getting any overflow checking in this case.
+
- Boot Delay: CONFIG_BOOTDELAY - in seconds
Delay before automatically booting the default image;
set to -1 to disable autoboot.