bug? gcc/graphite-poly.h:398:43: error: 'isl_constraint' has not been declared

["dclarke at blastwave dot org" <dclarke at blastwave dot org>]

Dear gcc types : 

It has been a while since I tried to bootstrap gcc and with the latest
production release 5.2.0 and I see on the "Prerequisites for GCC" page
that "ISL Library version 0.15, 0.14, 0.13, or 0.12.2" is required as
per https://gcc.gnu.org/install/prerequisites.html

I therefore fetched isl 0.15 from the infrastructure ftp site : 

     ftp://gcc.gnu.org/pub/gcc/infrastructure/isl-0.15.tar.bz2

I extracted it into the gcc 5.2.0 source tree and created a symlink
from isl-0.15 to isl thus : 

# bzip2 -dc ../../src/isl-0.15.tar.bz2 | tar -xf - 
# ln -s ./isl-0.15 ./isl

This results in the in-tree extracted sources for the pre-requisites :

# ls -lad gmp-6.0.0 gmp mpfr-3.1.3 mpfr mpc-1.0.3 mpc isl isl-0.15
lrwxrwxrwx   1 root root      11 Sep 21 22:14 gmp -> ./gmp-6.0.0
drwxr-xr-x  15 1001 root      70 Mar 25  2014 gmp-6.0.0
lrwxrwxrwx   1 root root      10 Oct  2 10:46 isl -> ./isl-0.15
drwxrwxr-x   9 1000 1000     187 Jun 11 10:47 isl-0.15
lrwxrwxrwx   1 root root      11 Sep 21 22:14 mpc -> ./mpc-1.0.3
drwxr-xr-x   6 1001 1001      29 Feb 16  2015 mpc-1.0.3
lrwxrwxrwx   1 root root      12 Sep 21 22:15 mpfr -> ./mpfr-3.1.3
drwxr-xr-x   9 1000 1000      35 Jun 19 19:55 mpfr-3.1.3


I then do configure in a build directory as per usual and then try
a bootstrap using my available gcc compiler thus : 

mimas_# which gcc
/usr/local/gcc4/bin/gcc

mimas_# gcc --version 
gcc (genunix Fri Jan  2 11:56:03 GMT 2015) 4.9.2
Copyright (C) 2014 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is
NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE.


The make process runs for hours and then fails : 

.
.
.
In file included from
/usr/local/build/gcc-5.2.0/isl/include/isl/map_type.h:4:0,
                 from
/usr/local/build/gcc-5.2.0/isl/include/isl/set.h:13,
                 from ../../gcc-5.2.0/gcc/graphite.c:38:
/usr/local/build/gcc-5.2.0/isl/include/isl/ctx.h:83:17: warning: comma
at end of enumerator list [-Wpedantic]
  isl_stat_ok = 0,
                 ^
In file included from ../../gcc-5.2.0/gcc/graphite.c:88:0:
../../gcc-5.2.0/gcc/graphite-poly.h:398:43: error: 'isl_constraint' has
not been declared
 extern void print_isl_constraint (FILE *, isl_constraint *);
                                           ^
../../gcc-5.2.0/gcc/graphite-poly.h:402:35: error: variable or field
'debug_isl_constraint' declared void
 extern void debug_isl_constraint (isl_constraint *);
                                   ^
../../gcc-5.2.0/gcc/graphite-poly.h:402:35: error: 'isl_constraint' was
not declared in this scope
../../gcc-5.2.0/gcc/graphite-poly.h:402:51: error: expected
primary-expression before ')' token
 extern void debug_isl_constraint (isl_constraint *);
                                                   ^
gmake[3]: *** [graphite.o] Error 1
gmake[3]: Leaving directory
`/usr/local/build/gcc-5.2.0_SunOS5.10_sparcv9.001/gcc'
gmake[2]: *** [all-stage1-gcc] Error 2
gmake[2]: Leaving directory
`/usr/local/build/gcc-5.2.0_SunOS5.10_sparcv9.001'
gmake[1]: *** [stage1-bubble] Error 2
gmake[1]: Leaving directory
`/usr/local/build/gcc-5.2.0_SunOS5.10_sparcv9.001'
gmake: *** [all] Error 2


Wondering if isl 0.15 is really ready to go or should I use a previous 
version or can I remove the isl bits entirely ? 

Dennis