On Mon, Aug 18, 2014 at 12:24:06PM -0600, Simon Glass wrote: > On 18 August 2014 01:16, Thierry Reding <[email protected]> wrote: > > From: Thierry Reding <[email protected]> > > > > This macro can be overridden in source files (before including common.h) > > and can be used to specify a prefix for debug and error messages. An > > example of how to use this is shown below: > > > > #define pr_fmt(fmt) "foo: " fmt > > > > #include <common.h> > > > > ... > > debug("bar"); > > > > The resulting message will read: > > > > foo: bar > > > > Signed-off-by: Thierry Reding <[email protected]> > > Acked-by: Simon Glass <[email protected]> > > Seems OK. But I wonder if a string might be simpler? > > #define DEBUG_PREFIX "foo: " > > +#ifndef DEBUG_PREFIX > +#define DEBUG_PREFIX "" > +#endif
The advantage of using the macro is that it can perform more complicated
transformations on the format string, like this for example:
#define pr_fmt(fmt) "foo: %s():" fmt, __func__
Thierry
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