Re: [RFC] Add Platform Include path in modules

[Laszlo Ersek <lersek@redhat.com>]

On 02/26/18 11:55, Pankaj Bansal wrote:
> Hi,
> 
> Consider a simple driver which needs that some data structures be
> filled by the Platform, which is using the driver.
> 
> Driver.c #include <Platform.h>
> 
> Struct a = platformVal;
> 
> We can define platformVal in Platform.h, which would be unique to the
> platform being built. This Platform.h can be placed in include
> directories, whose path would be defined in Platform.dec file.
> 
> Now, whenever we build driver for each unique platform, we need not
> to mention Platform.dec file in driver.inf [packages] section. We can
> append Platform.dec include paths to each driver. i.e. look for the
> include files in [packages] section as well as in Platform include
> directories.
> 
> For this, I am looking for Platform.dec file in same directory as
> Platform.dsc and using same name as Platform.dsc
> 
> We can refine this change further. i.e. add Platform include
> directories to driver's include paths based on some condition in
> driver.inf file.

(Apologies in advance if I failed to grasp the use case.)

If I understand correctly, you have multiple platforms (defined by DSC
and FDF files), and you build a given driver for several of these
platforms, separately. And, when building the driver for the separate
platforms, you'd like the driver to get different initializers for
various static (global) structure variables.

Have you tried the structured PCD format? I think that could cover your
use case.

Unfortunately I couldn't find anything about structured PCDs in the edk2
specs, but there are several BZ references in the following mailing list
message:

[edk2] [Patch 00/14] Enable Structure PCD support in edk2

http://mid.mail-archive.com/1512140335-6932-1-git-send-email-liming.gao@intel.com

Thanks
Laszlo