[U-Boot] RFC: auto-generate ARM mach-types.h file from ARM machine database

[Wolfgang Denk <wd@denx.de>]

Dear Michael Schwingen,

In message <4DC5259C.7040208@discworld.dascon.de> you wrote:
>
> If I put rules in arch/arm/config.mk, then the first of these rules
> becomes the default rule which is executed in subdir makes (like "make
> -C arch"), which breaks compilation completely, since config.mk is
> included before the rules are defined in the subdir Makefiles.

You are not suppoed to put any make rules in config.mk files.

> It seems the current scheme allows only variable definitions in
> config.mk files, which is not sufficient here.

As the name implies, these files contain configuration (= variable)
settings. Nothing else.

> rules.mk would be fine, however, there is no provision to include rules
> from lower directories, since all the building in subdirectories is
> handled by recursively calling make (this is one of the problems that
> arise by recursively calling make for each directory, but that is a
> different topic).

But lower level directories inherit all settings from the top level
Makefile?

Best regards,

Wolfgang Denk

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