[mercury-users] Problem compiling 0.12.1 in Fedora 4 (gcc32)

[Julien Fischer]

On Tue, 6 Dec 2005, Ralph Becket wrote:

> Hi Robert,
>
> the problem you observe
>
> > mercury_layout_util.c: In function `MR_generate_proc_name_from_layout':
> > mercury_layout_util.c:894: unable to find a register to spill in class `SIREG'
> > mercury_layout_util.c:894: this is the insn:
> > (insn:QI 113 112 114 (parallel[
> >             (set (reg:CC 17 flags)
> >                 (compare:CC (mem:BLK (reg/f:SI 0 eax [80]) [0 A8])
> >                     (mem/s/u:BLK (reg/f:SI 1 edx [81]) [71 S10 A8])))
>
> is a bug in gcc 3.2.3 which we don't seem to have encountered before.
> On the "Current Release" web page there is a "What do I need?" section
> which includes some details:
>
> 	 We recommend GCC 3.4.x.
>
> 	 GCC 3.0, 3.3.1 and 4.0 will NOT work. They have bugs which
> 	 cause internal compiler errors when compiling the C code
> 	 generated by the Mercury compiler.
>
> 	 Avoid GCC 2.96 (distributed with Red Hat Linux 7.x) and other
> 	 unofficial releases of GCC. Also avoid versions of GCC less
> 	 than GCC 2.95.X.
>
> We will extend the list of known buggy gcc versions to include 3.2.3.
> The best solution is to install a 3.4.x version.  Apologies for the
> inconvenience!
>

Actually, we have encountered similar problems with gcc 3.2 before; the
reason it's not on the buggy gcc list is that we thought we'd worked
around them - apparently not though :-(

Cheers,
Julien.
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