Fail with "cnip: preprocessor invocation failed" on large file

[malbarbo]

Description

Generate a large large file:

for i in $(seq 1 100000); do echo "int i$i;" >> a.c; done

Run cnip:

./cnip a.c

Get the error:

cnip: preprocessor invocation failed

Version

commit cb578e9d10c2cc67980e9f383f9afd542f784e17 (HEAD -> master, origin/master, origin/HEAD)
Author: Leandro T. C. Melo <ltcmelo@gmail.com>
Date:   Mon Feb 22 10:24:11 2021 -0300

    add Psyche-C logo

Expected behavior

I would expect cnip run without any error.

[aytey]

It looks like this was fixed in:

* 21717af

but the build was broken, so works as of:

* 847c471

Currently this is hidden under the --cc-pp option, but still reproduces if you use --cc-pp.