[PATCH]. Fix HAVE_SYS_SDT_H for cross-compilation

[Christian Bruel]

Hello Bill and Jakub

On 08/22/2013 07:47 PM, Jakub Jelinek wrote:
> On Thu, Aug 22, 2013 at 09:39:48AM -0500, Bill Schmidt wrote:
>> Hi Christian and Jakub,
>>
>> I'm curious whether there was ever any resolution for:
>> http://gcc.gnu.org/ml/gcc-patches/2012-12/msg01124.html.
>

Sorry for not having sent a follow up for this.

The problem is that configure was checking for cross features in the
host root dir instead of the cross root dir.

This SDT failure was only the visible part of the problem while building
a Canadian Cross linux hosted GCC, as  we could as well silently test
for different cross/target runtime features :-).

I fixed this problem  by fixing the usage of with_build_sysroot while
checking system features with target_header_dir when host != build.
Checked for legacy issue with various bare or hosted SH4 compilers in
various environments (linux, mingwn, cygwin)

Comments ? does this is seems reasonable to push to trunk ?

Cheers

Christian


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