[Bug preprocessor/89738] Warn for unused macro arguments

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89738

Andrew Pinski  changed:

   What|Removed |Added

 Ever confirmed|0   |1
 Status|UNCONFIRMED |NEW
   Last reconfirmed||2021-12-19
   Severity|normal  |enhancement

--- Comment #3 from Andrew Pinski  ---
Confirmed, though I don't know if this warning should be enabled by default as
there are many macro functions which don't use the arguments, especially
conditional defined ones.

[Bug preprocessor/89738] Warn for unused macro arguments

[david.bolvansky at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89738

--- Comment #2 from Dávid Bolvanský  ---
#define PARENT_NODE(x) ((id - 1) / 2)

int id = 0;
int idx = 1;
PARENT_NODE(idx); // macro contais id, but id is defined, warn?


But probably such analysis is not so easy...

[Bug preprocessor/89738] Warn for unused macro arguments

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89738

Andrew Pinski  changed:

   What|Removed |Added

  Component|c   |preprocessor

--- Comment #1 from Andrew Pinski  ---
One of the issue is that some macro functions are designed to ignore the
argument; e.g. assert.