[PATCH, CFT] Fix bootstrap with in-tree ISL

[Bernhard Reutner-Fischer]

On 1 April 2015 at 17:53, Tobias Grosser <tobias@grosser.es> wrote:
> On 04/01/2015 05:09 PM, Bernhard Reutner-Fischer wrote:
>>
>> Hi,
>>
>> Trying to build config-list.mk for current trunk.
>> The box is a stable debian (7.8 it seems) so the OS' ISL is too old
>> thus i was attempting to use in-tree ISL.
>>
>> When using an in-tree ISL gcc attempts to determine if it is recent
>> enough and AFAIU fails to do so since the system's ISL (which we will not
>> use)
>> might be too old and the in-tree ISL is not yet built.
>>
>> This results in HAVE_ISL_SCHED_CONSTRAINTS_COMPUTE_SCHEDULE being not
>> set and thus compilation of graphite-isl-ast-to-gimple.c fails with
>> "template with C linkage".
>>
>> The attached seems to get me past compilation of
>> graphite-isl-ast-to-gimple.c with config-list.mk for e.g.
>> alpha-linux-gnu
>>
>> I'm scheduling a proper regstrap on x86_64-linux-gnu for a native
>> compiler but this will take days to start i fear.
>> So.. if somebody has spare cycles.. :)
>
>
> Hi Bernhard,
>
> I can not give an OK for the makefile/configure changes, but in general this
> seems to be the right direction.

It seems that the in-tree ISL is not configured nor built upon make
all-gcc, so libbackend linking fails as it stands. Will have a closer
look..

thanks,
>
> Thanks,
> Tobias