Bug 492973
| Summary: | optimized strncmp macro creates odd warnings | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Bill Nottingham <notting> |
| Component: | gcc | Assignee: | Jakub Jelinek <jakub> |
| Status: | CLOSED DUPLICATE | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | medium | Docs Contact: | |
| Priority: | low | ||
| Version: | rawhide | CC: | dcantrell, jakub, rvokal |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2009-03-31 00:25:13 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
*** This bug has been marked as a duplicate of bug 492846 *** |
[notting@nostromo: ~]$ cat foo.c #include <stdio.h> #include <string.h> int main() { char *foo = ".."; printf("%d\n", strncmp(foo, ".",1)); return 0; } [notting@nostromo: ~]$ gcc -Wall -o foo foo.c -O2 foo.c: In function ‘main’: foo.c:6: warning: offset ‘3’ outside bounds of constant string Turning off optimization (or parens around strncmp) fixes the warning. Version-Release number of selected component (if applicable): gcc-4.4.0-0.30.x86_64 glibc-devel-2.9.90-11.x86_64 How reproducible: 100%