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

[Jonathan Wakely <jwakely dot gcc at gmail dot com>]

On 2 October 2015 at 11:51, dclarke@blastwave.org wrote:
>
> 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

It's not required, because it's only used for the optional Graphite
optimisations.

> 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 ?

You don't need ISL to build GCC and can remove it entirely.

Or you can run ./contrib/download_prerequisites to fetch known-good
versions (that uses isl-0.14)