Dejagnu: use -isystem to include system header files.

[Daniel Jacobowitz]

On Thu, Nov 11, 2004 at 11:58:15AM +0000, Nick Clifton wrote:
> Hi Guys,
> 
>   I am going to check in the attached patch which imports a fix from
>   the mainline dejagnu sources.  This fix is to use the -isystem
>   switch to include system header files rather than -I.  This fixes
>   several unexpected failures in the GCC and G++ testsuites where the
>   newlib system header file <limits.h> is included in strict ANSI
>   mode, and the compiler barfs on the #include_next directive.

This patch will break in-tree testing for yet other targets.  I believe
arm-elf was affected - anything which does not set
NO_IMPLICIT_EXTERN_C.  I discussed this with H-P on the dejagnu list
but never figured out a solution, but...

>         * lib/libgloss.exp (newlib_include_flags): Use -isystem, not -I.
>         (libio_include_flags, g++_include_flags, libstdc++_include_flags,
>         winsup_include_flags): Ditto.

... I strongly suspect that g++ and winsup should be left out.

-- 
Daniel Jacobowitz