Preprocessor fails to make arithmetic calculation

[vilox]

Let check this test.c:

#if ((0xffffffffffffffffULL) % 0xFFFF)
# error BOOOOM
#endif
int main(void) { return 0; }

$ cppcheck --enable=all --error-exitcode=17 test.c ; echo $?
Checking test.c ...
0

... nice. But suddenly

$ cppcheck --enable=all --error-exitcode=17 -DSOME test.c; echo $?
Checking test.c ...
test.c:2:0: error: #error BOOOOM [preprocessorErrorDirective]
# error BOOOOM
^
17

Applies to version 2.3, current git (2020-12-28 b94a6d595), debian 10 on x64.
I do not have bugtracker account, so report this here.

[Daniel Marjamäki]

Thanks! I have created ticket https://trac.cppcheck.net/ticket/10132

The analysis of the test.c is essentially skipped because there is #error. I believe this is a usability problem more or less.

Normally we just want to skip configurations that lead to an #error.. we do not want to set the error exitcode and we do not want to check those configurations..

If all configurations that are checked have an #error then maybe it would make sense to write some information message that cppcheck fails to analyze the file. Setting the error exitcode also sounds reasonable..