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* [Bug c/115311] New: -fno-builtin-xxx allowing anything for xxx @ 2024-05-31 17:34 gjl at gcc dot gnu.org 2024-05-31 20:39 ` [Bug c/115311] " jsm28 at gcc dot gnu.org ` (2 more replies) 0 siblings, 3 replies; 4+ messages in thread From: gjl at gcc dot gnu.org @ 2024-05-31 17:34 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115311 Bug ID: 115311 Summary: -fno-builtin-xxx allowing anything for xxx Product: gcc Version: 14.1.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: gjl at gcc dot gnu.org Target Milestone: --- Test case: echo "" | gcc -xc - -S -fno-builtin-isinfff This should rather complain that isinfff is not a valid built-in to disable. Marked as a "c" flaw as the logic is in c-family. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c/115311] -fno-builtin-xxx allowing anything for xxx 2024-05-31 17:34 [Bug c/115311] New: -fno-builtin-xxx allowing anything for xxx gjl at gcc dot gnu.org @ 2024-05-31 20:39 ` jsm28 at gcc dot gnu.org 2024-06-01 9:28 ` gjl at gcc dot gnu.org 2024-06-03 6:57 ` rguenth at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: jsm28 at gcc dot gnu.org @ 2024-05-31 20:39 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115311 --- Comment #1 from Joseph S. Myers <jsm28 at gcc dot gnu.org> --- This definitely wouldn't work for glibc; we freely use -fno-builtin-<func> when e.g. aliasing double and long double functions when the formats are the same, where GCC gives an error if it has the functions as built-in and so objects to the incompatible types, and we don't limit this to the functions GCC has as built-in in a particular version but also use those options for functions that might be built-in in future (e.g. C23 functions). The number of functions involved is large, needing configure tests for all of them would be a bad idea. That is, it's useful to use -fno-builtin-<func> for a valid function name that might be built-in in future without needing configure tests for whether it's built-in in a particular version. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c/115311] -fno-builtin-xxx allowing anything for xxx 2024-05-31 17:34 [Bug c/115311] New: -fno-builtin-xxx allowing anything for xxx gjl at gcc dot gnu.org 2024-05-31 20:39 ` [Bug c/115311] " jsm28 at gcc dot gnu.org @ 2024-06-01 9:28 ` gjl at gcc dot gnu.org 2024-06-03 6:57 ` rguenth at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: gjl at gcc dot gnu.org @ 2024-06-01 9:28 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115311 Georg-Johann Lay <gjl at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |WONTFIX --- Comment #2 from Georg-Johann Lay <gjl at gcc dot gnu.org> --- Thanks for the explanation; so it's a feature rather than a bug. Closing as won't fix. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c/115311] -fno-builtin-xxx allowing anything for xxx 2024-05-31 17:34 [Bug c/115311] New: -fno-builtin-xxx allowing anything for xxx gjl at gcc dot gnu.org 2024-05-31 20:39 ` [Bug c/115311] " jsm28 at gcc dot gnu.org 2024-06-01 9:28 ` gjl at gcc dot gnu.org @ 2024-06-03 6:57 ` rguenth at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: rguenth at gcc dot gnu.org @ 2024-06-03 6:57 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115311 --- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> --- Note we handle -Wno-xyz similarly, but of course a typo like -fno-builtin-sun (s/sun/sin) isn't noticed this way which is the drawback. ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2024-06-03 6:57 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2024-05-31 17:34 [Bug c/115311] New: -fno-builtin-xxx allowing anything for xxx gjl at gcc dot gnu.org 2024-05-31 20:39 ` [Bug c/115311] " jsm28 at gcc dot gnu.org 2024-06-01 9:28 ` gjl at gcc dot gnu.org 2024-06-03 6:57 ` rguenth at gcc dot gnu.org
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