Re: [lkcd-devel] Re: [kbuild-devel] sorting out the kerntypes mess

2005-02-11 Thread Arnd Bergmann 
On Dunnersdag 10 Februar 2005 17:51, Christoph Hellwig wrote:
 Linking it into vmlinux would increase vmlinux size, which is exactly
 what the Kerntypes approach is trying to avoid.

Well, building the whole kernel with -gstabs or similar will enlarge
the binary by factor ten or more, which should definitely be avoided.

The kerntypes.o file is very small compared to vmlinux, so it doesn't
hurt much to link them together. Also, the debug information is stripped
out of the zImage file and therefore doesn't affect many uses at all.

OTOH, it should also be possible to just drop the debug information
in the vmlinux link step and create a separate binary with only the debug
data from the same input files, using a different linker script.

Arnd 




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Re: [lkcd-devel] Re: [kbuild-devel] sorting out the kerntypes mess

2005-02-10 Thread Christoph Hellwig 
On Sun, Jan 30, 2005 at 11:16:35PM +0100, Arnd Bergmann wrote:
 On S?nndag 30 Januar 2005 18:37, Christoph Hellwig wrote:
   So you expect kerntypes-y := file.o
   to be present in one or a few places outside arch/
   And then in one or a few files within arch/ the arch
   specific types are brought in with kerntypes-y := archfile.o
   
   And kbuild shall link the resuting files to a single kerntypes.o file
   to be located in the root of the kernel output dir.
  
  Currenly it's called Kerntypes, which would make sense to be kept, but
  else yes.
 
 How about simply linking the kerntypes files into vmlinux? AFAIK, lcrash
 is able to use vmlinux with stabs information instead of a separate
 kerntypes file. Supporting this could be as simple as putting
 
 obj-y += $(kerntypes-y)
 $(kerntypes-y): CFLAGS += $(KERNTYPES_FLAGS)
 
 into scripts/Makefile.build, although I haven't tried that.

Linking it into vmlinux would increase vmlinux size, which is exactly
what the Kerntypes approach is trying to avoid.



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