[mercury-users] Odd behaviour...

[Fergus Henderson]

On 24-Feb-1999, Ralph Becket <rwab1 at cam.sri.com> wrote:
> This always worked before, but now...
> 
> $ mmake hello_world 
> mgnuc --grade asm_fast.gc     -I.       -c Mercury/cs/hello_world.c -o
> Mercury/os/hello_world.o
> cc1: Invalid option `-fno-gcse'

> Any clues?  I've a funny idea that we had an OS upgrade recently -
> does that sound a likely cause?  If so, I presume recompiling will do
> the trick.

You must have just upgraded to gcc 2.8.*.

Mercury 0.8 and 0.8.1 have a bug where they pass `-fno-gcse' to gcc,
which is accepted by gcc 2.7.* and by egcs 1.0.* and 1.1.*,
but not by gcc 2.8.*.  I posted a patch for that to this list
sometime in the last few months.  But you can also fix it simply
by editing the `mgnuc' script and deleting the `-fno-gcse'.

-- 
Fergus Henderson <fjh at cs.mu.oz.au>  |  "Binaries may die
WWW: <http://www.cs.mu.oz.au/~fjh>  |   but source code lives forever"
PGP: finger fjh at 128.250.37.3        |     -- leaked Microsoft memo.