On Mon, 29 Apr 2002 18:03:37 +1000,
Brendan J Simon <[EMAIL PROTECTED]> wrote:
>Keith Owens wrote:
>
>>base_target(zlib_dummy) # so it does not default to vmlinux
>>objlink(zlib.a zlib.o)
>>select(zlib.a)
>>
>Can the "zlib_dummy" identifier be called zlib.a ?
>Is that too confusing ??
Not to kbuild, it might be confusing to humans.
>>Is zlib.a only used in zvmlinux or will it be used by multiple boot
>>loader targets? It makes a difference to the best way to handle it.
>>
>It looks like multiple boot loader targets use zlib.a.
>/arch/ppc/boot/chrp
>/arch/ppc/boot/mbx
>/arch/ppc/boot/pmac
>/arch/ppc/boot/prep
>/arch/ppc/boot/simple
>/arch/ppc/boot/tree
>
>What's the best way to handle it for all these bootloader targets ?
Normally I recommend that each object that is to be linked into a
target be explicitly specified against each base target that uses it,
like this.
base_target(abc)
select(foo.o)
base_target(def)
select(foo.o)
base_target(xyz)
select(foo.o)
And each base target has link_subdir(foo_directory). Explicitly
specifying objects against each base that uses them is self documenting
and checking.
Libraries are a special case, they are meant to used repeatedly so
doing a separate select() for each base target provides no extra
information, and can be downright ugly. For a library, do one dummy
base target and select it once. Then manually append the librray name
to the object list for each base target. For example,
base_target(zlib.a)
objlink(zlib.a zlib.o)
select(zlib.a)
Other directory :-
base_target(XXX)
select(abc.o)
link_subdirs(def)
XXX_objects := $(__pp_XXX_objects) # automatically filled in by kbuild
XXX_objects += $(objfile /arch/$(ARCH)/zlib.a)
user_command(XXX
($(XXX_objects) ...
Real example from ia64.
installable(CONFIG_IA64_SGI_SN fprom)
base_target(fprom)
select(fpromasm.o main.o fw-emu.o fpmem.o klgraph_init.o)
fprom_objects := $(__pp_fprom_objects)
fprom_objects += $(objfile /arch/$(ARCH)/lib/lib.a)
user_command(fprom
($(fprom_objects))
($(LD) -static -T$(srcfile fprom.lds) $(fprom_objects) -o $@)
()
)
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