Re: [PATCH] uml: remove elf.h

[Andrew Morton <akpm@osdl.org>]

Linux Kernel Mailing List <linux-kernel@vger.kernel.org> wrote:
>
> tree a3d85d9f43f64bbd8437c973caf98f79d95b5f3e
> parent a123edab03ac39e08c2f9cb4fc1af07e099c68bc
> author Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Tue, 17 May 2005 11:53:14 -0700
> committer Linus Torvalds <torvalds@ppc970.osdl.org> Tue, 17 May 2005 21:59:11 -0700
> 
> [PATCH] uml: remove elf.h
> 
> Actually remove elf.h in the tree.  The previous patch, due to a quilt
> bug/misuse, left it in the tree as a 0-length file, preventing the build to
> see it as missing and to generate a symlink in its place.
> 
> Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
> Signed-off-by: Andrew Morton <akpm@osdl.org>
> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
> 
>  asm-um/elf.h |    0 
>  1 files changed
> 
> Index: include/asm-um/elf.h

Hot damn, this zero-length file is hard to get rid of.  I pulled Linus's
tree this morning with this bizarre concoction:

	cd $GIT_TREE
	cg-pull origin
	tagsha1=$(cat .git/refs/tags/v$(kversion))
	t=$(cat-file tag $tagsha1 | head -n 1 | sed -e 's/object //')
	cg-diff -r $t -r $(cat .git/refs/heads/origin) > $PULL/linus.patch

and the resulting diff has:

Index: include/asm-ia64/ioctl32.h
===================================================================
--- eed337ef5e9ae7d62caa84b7974a11fddc7f06e0/include/asm-ia64/ioctl32.h  (mode:100644 sha1:d0d227f45e05d23705ac849f4bd5c06a28288b58)
+++ 6bb5a1cf91bbda8308ec7e6d900cb89071907dcd/include/asm-ia64/ioctl32.h  (mode:100644 sha1:e69de29bb2d1d6434b8b29ae775ad8c2e48c5391)
@@ -1 +0,0 @@
-#include <linux/ioctl32.h>
Index: include/asm-um/elf.h
===================================================================
Index: include/asm-x86_64/apicdef.h
===================================================================

which of course doesn't remove that file at all.

And I bet that when Linus releases patch-2.6.12-rc5.gz and patch-2.6.12.gz,
they will have the same construct.  AFAICT, the patch-based people will
need to download a full new tarball to get rid of this dang file.

It all wouldn't really matter much, except apparently the mere presence of
this file breaks the UML build.

Frazzle.  Paolo, I'm almost wondering if we should change that test to also
check for a zero-length file.
-
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