Re: [ECOS] Order in which CDL scripts are processed

[Gary Thomas <gary@mlbassoc.com>]

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Mike Sweeney wrote:
> While looking through the code for the CYGPKG_HAL_ARM_XSCALE_CORE
> package I noticed that it exports some header files to cyg/hal in the
> install tree. In particular, it exports hal_cache.h which contains
> some cache size definitions and such. Furthermore, some of the generic
> ARM platform HAL packages such as the CYGPKG_HAL_ARM_AEB export
> hal_cache.h to the same directory. Now, granted since the generic ARM
> targets won't include the XScale package there won't be a conflict,
> but out of curiousity if I did export a hal_cache.h from an XScale
> variant HAL package is there any guarantee as to which hal_cache.h
> would end up in the install tree under include/cyg/hal, i.e. the one
> from CYGPKG_HAL_ARM_XSCALE_CORE or the one from my XScale variant HAL
> package?
> 
> In a nutshell, if I export the same header file to the same directory
> from two different packages, which one wins out or is it undefined
> behavior?

Undefined and probably no guaranteed behaviour, so don't do it.

If you need platform and/or variant changes/additions, there are
files for that (which are in turn included by the main hal_cache.h)


- --
- ------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
- ------------------------------------------------------------
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