diff options
| author | Simon Glass <sjg@chromium.org> | 2019-02-16 20:24:37 -0700 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2019-02-20 15:21:44 +0800 |
| commit | f9811e8575eb42e75c615ba9b44f0481cdb78330 (patch) | |
| tree | 8eb5ef4d0bb4529d4bb2d017310881023e8273b7 /doc/README.log | |
| parent | 8dee7b96fd6eaea54400aaf317f72aac9b323b58 (diff) | |
log: Allow #define LOG_DEBUG to enable logging in a file
At present it is possible to '#define DEBUG' at the top of a file which
causes all debug() statements in that file to become active. There is
currently no equivalent with logging, but this is a useful function.
Add a LOG_DEBUG define along with documentation.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'doc/README.log')
| -rw-r--r-- | doc/README.log | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/doc/README.log b/doc/README.log index 75350ecd41..19856d43da 100644 --- a/doc/README.log +++ b/doc/README.log @@ -69,6 +69,21 @@ If CONFIG_LOG is not set, then no logging will be available. The above have SPL versions also, e.g. CONFIG_SPL_MAX_LOG_LEVEL. +Temporary logging within a single file +-------------------------------------- + +Sometimes it is useful to turn on logging just in one file. You can use this: + + #define LOG_DEBUG + +to enable building in of all logging statements in a single file. Put it at +the top of the file, before any #includes. + +To actually get U-Boot to output this you need to also set the default logging +level - e.g. set CONFIG_LOG_DEFAULT_LEVEL to 7 (LOGL_DEBUG) or more. Otherwise +debug output is suppressed and will not be generated. + + Convenience functions --------------------- |