Fix: tommyds: ignore incorrect -Wfree-nonheap-object warnings by GCC
#301
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- GCC 15 (and maybe other versions) reports warnings in the `tommyds` library about freeing non-heap objects when compiling RTRlib without debug options (`-D CMAKE_BUILD_TYPE=Release`), even though the code is correct. A GCC bug report for false-positives when the `-Wfree-nonheap-object` option is enabled can be found in https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54202.
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Contribution description
#296 reports that with GCC 15 warnings for freeing non-heap objects are reported while compiling RTRlib.
I could reproduce the warnings when using a release build (
-D CMAKE_BUILD_TYPE=Release) for the reported version as well as on master. However, the warnings are false positives since the correct pointers (i.e. the pointers that were returned bytommy_calloc/tommy_malloc) are passed totommy_free.A quick search online revealed that GCC can report false positives when the
-Wfree-nonheap-objectoption is enabled (see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54202).To remove the warning and avoid further bug reports in the future I disabled the warning for the respective lines in the C code by using the following GCC pragma construct:
Testing procedure
Issues/PRs references
Fixes #296