Re: compiling GHC with a custom path to GCC

Malcolm Wallace wrote:

Seth Kurtzberg writes:

...

There has to be one, because the problem occurs when you compile gcc with gcc. I'll look for a specific bug report. It happens much more frequently with 3.x than with 2.95, in my testing, but that was not a test of compiling Haskell, so I have no frequency information, specifically.

Sounds like a CPU-overheating problem to me. It is well known that running an inadequately cooled processor at 100% for an extended period will cause random crashes. There are third-party reports that it happens with Linux kernel builds, and I have personally seen it with builds of nhc98 and Hat. When I replaced the CPU fan, the problems disappeared.

...

The other problem for the gcc people is the fact that it occurs randomly. The behavior has changed; 3.4 will crash in a different place than 3.3. If the program is large enough, it will happen.

Non-repeatable crashes certainly point the finger first at hardware rather than software. Could also be deteriorating memory chips - but that is likely to bring the whole machine down eventually.

Regards, Malcolm

Ordinally I would agree, but in this cases it hash to be software because I got probem on 40 different solais system As for the processor overheating, you would expect that it's on it's last legs if it starts overheating. It also happens on older machies; I've seen it happen on a PII machine, which isn't terribly hot. I think that because I've seen it so many times, on machines that continue to run flawlessly, some for two years, we can eliminate hardware. This is almost certainly heap corruption. The KDE tool that is like purify (only better and free), valgrind, should help fix it if it is caused by any sort of memory corruption. That would be Remember, it is always crashing (I believe always) with an internal compiler error. Were hardware involved, you would expect to not get the same message. (Unless its the only error they have a name for). If you really want to fix it, we could use a watchdog timer, and have it restart the compiler whenever it crashes.

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