Re: cross-compiling flags?

[Hollis Blanchard <hollisb@us.ibm.com>]

On Wednesday 05 November 2008 20:51:18 Liu Yu wrote:
> 
> > -----Original Message-----
> > From: Hollis Blanchard [mailto:hollisb@us.ibm.com] 
> > Sent: Tuesday, November 04, 2008 11:57 PM
> > To: Liu Yu-B13201
> > Cc: kvm-ppc
> > Subject: cross-compiling flags?
> > 
> > Hi Yu, Christian tells me you have some weird cross-build setup that
> > brings you to want to use gcc's -idirafter flag for zlib headers. I
> > don't like using something that obscure. Can you elaborate on 
> > the errors
> > you get when using -I ?
> > 
> 
> I don't know what libc headers are used in your case. The host libc
> header files?

When I cross-compile qemu, it's using the cross-toolchain glibc headers. Since 
my toolchain is from crosstool, those headers are 
at /opt/crosstool/gcc-3.4.5-glibc-2.3.6/powerpc-440-linux-gnu/powerpc-440-linux-gnu

> In my case, the libc headers are already appointed to a
> toolchain-combined version in LTIB(assume you know it).
> But zlib.h is not existing so I had to use qemu-cflag to appoint another
> dir

If your zlib headers are mixed in with the target libc headers, then why do 
you need any -I at all?

I have heard of LTIB, but I don't know how its toolchain is installed.

-- 
Hollis Blanchard
IBM Linux Technology Center