[PATCH v7 0/9] ARM: VDSO

On Sat, Jun 28, 2014 at 10:55:04AM +0100, Russell King - ARM Linux wrote:

On Sat, Jun 28, 2014 at 10:42:19AM +0100, Russell King - ARM Linux wrote:

quoted

On Fri, Jun 27, 2014 at 12:01:12PM -0500, Nathan Lynch wrote:

quoted

Since removing -lgcc from the link (one of the changes from v6 to v7), I
believe the VDSO is not asking more of the toolchain or build
environment than the rest of the kernel does.  I have definitely built
it without a target libc.  Apart from the host program's use of
too-recent ELF constants (now fixed), I would appreciate help
identifying any remaining sources of fragility.

There's still something wrong:

fs/binfmt_elf.c: In function 'create_elf_tables':
fs/binfmt_elf.c:231:35: error: 'AT_SYSINFO_EHDR' undeclared (first use in this function)
fs/binfmt_elf.c:231:35: note: each undeclared identifier is reported only once for each function it appears in

The problem is the fscking generated includes.  This is going to be a
right pain - Arnd, is there anything which can be done about this?

And yes, I see that you've mentioned this in the cover - but I think we
/really/ need this solved before we can merge this series, otherwise
we're likely to get lots of people asking about it.

Thinking about this some more - if this can't be resolved by kbuild,
then I think we should add to arch/arm/Kconfig to detect the generated
include file, print a helpful message telling the user how to fix their
build tree, and error out.

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