Bug#905539: gcc-7 FTBFS with isl 0.20

[Helmut Grohne <helmut@subdivi.de>]

Source: gcc-7
Version: 7.3.0-27
Severity: serious
Tags: ftbfs
User: helmutg@debian.org
Usertags: rebootstrap

Hi Matthias,

I'm not sure whether you're aware already, but I felt that it was best
to just document that gcc-7 fails to build against isl 0.20. I tried to
check the vcs on whether this is already pending, but since alioth is
offline finding the vcs is difficult. Maybe you could also update the
Vcs fields. Build log symptom:

| ../../src/gcc/graphite-optimize-isl.c: In function 'isl_schedule_node* get_schedule_for_node_st(isl_schedule_node*, void*)':
| ../../src/gcc/graphite-optimize-isl.c:57:52: error: 'isl_space_dim' was not declared in this scope
|    unsigned dims = isl_space_dim (space, isl_dim_set);

Helmut