RFC: PowerPC bsp_specs Clean Up Question

[Joel Sherrill]

Hi

Many of the PowerPC BSPs uses a shared linker script. That's good.
Unfortunately, there is variation in the start symbol and the use of a "-u"
(e.g. undefined) symbol in the bsp_specs. I had initially thought I would
add the start symbol and any use of -u to the linkcmds (EXTERN). But now I
am thinking that due to use of shared linker scripts and inconsistencies,
some BSPs are better off if I add command line arguments to the linking
stage.

Also some use motld_start.o as the start file which is in conflict with
other BSPs using the same linker script.

This is the fragment in bsp_specs I am trying to eliminate or standardize:

-e __rtems_entry_point -u __vectors motld_start.o%s

Thoughts?

--joel
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