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From: Florian Weimer <fweimer@redhat.com>
To: Mathieu Malaterre via Gcc-help <gcc-help@gcc.gnu.org>
Cc: Mathieu Malaterre <mathieu.malaterre@gmail.com>
Subject: Re: virtual memory exhausted: Cannot allocate memory
References: <CA+7wUsxJ4zHXFxbjvNZG7-YxBc3itGgHZX2Z9dhBBtbbzCv7vw@mail.gmail.com>
Date: Wed, 30 Nov 2022 08:29:55 +0100
In-Reply-To: <CA+7wUsxJ4zHXFxbjvNZG7-YxBc3itGgHZX2Z9dhBBtbbzCv7vw@mail.gmail.com>
	(Mathieu Malaterre via Gcc-help's message of "Wed, 30 Nov 2022
	08:19:41 +0100")
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* Mathieu Malaterre via Gcc-help:

> I am having a hard time understanding which flags to change in case of
> `virtual memory exhausted: Cannot allocate memory`. I can compile
> openvdb on all Debian supported arches but mipsel. I tried tweaking
> the debug level as well as the optimization level without luck so far.
>
> Latest attempt is:
>
> g++-12 [...] -g0 -O0 --param ggc-min-expand=0 --param
> ggc-min-heapsize=131072 [...]
>
> What should I try next ?

It could be a compiler bug.  GCC might try to allocate infinite amounts
or just way too much memory.

Perhaps you can build with -save-temps, capture the preprocessed .i
file, and then try to reproduce the issue with a cross-compiler using
that .i file?

Thanks,
Florian