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Building the extensions results in several warnings of two classes:
- comparison of integer expressions of different signedness: ‘Py_ssize_t’ {aka ‘long int’} and ‘size_t’ {aka ‘long unsigned int’} [-Wsign-compare]
- may be used uninitialized [-Wmaybe-uninitialized]
$ pip install -vv -e .
numcodecs/blosc.c: In function ‘__pyx_pf_9numcodecs_5blosc_22decompress’:
numcodecs/blosc.c:6049:38: warning: comparison of integer expressions of different signedness: ‘Py_ssize_t’ {aka ‘long int’} and ‘size_t’ {aka ‘long unsigned int’} [-Wsign-compare]
6049 | __pyx_t_2 = (__pyx_v_dest_nbytes < __pyx_v_nbytes);
| ^
In function ‘__Pyx_PyLong_From_int’,
inlined from ‘__pyx_pf_9numcodecs_5blosc_20compress’ at numcodecs/blosc.c:5659:17,
inlined from ‘__pyx_pw_9numcodecs_5blosc_21compress’ at numcodecs/blosc.c:4751:13:
numcodecs/blosc.c:14883:20: warning: ‘__pyx_v_cbytes’ may be used uninitialized [-Wmaybe-uninitialized]
14883 | return PyLong_FromLong((long) value);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
numcodecs/blosc.c: In function ‘__pyx_pw_9numcodecs_5blosc_21compress’:
numcodecs/blosc.c:4775:7: note: ‘__pyx_v_cbytes’ was declared here
4775 | int __pyx_v_cbytes;
| ^~~~~~~~~~~~~~
...
numcodecs/zstd.c: In function ‘__pyx_pf_9numcodecs_4zstd_2decompress’:
numcodecs/zstd.c:3816:38: warning: comparison of integer expressions of different signedness: ‘Py_ssize_t’ {aka ‘long int’} and ‘size_t’ {aka ‘long unsigned int’} [-Wsign-compare]
3816 | __pyx_t_3 = (__pyx_v_dest_nbytes < __pyx_v_dest_size);
| ^
...
numcodecs/lz4.c: In function ‘__pyx_pf_9numcodecs_3lz4_2decompress’:
numcodecs/lz4.c:3449:38: warning: comparison of integer expressions of different signedness: ‘int’ and ‘long unsigned int’ [-Wsign-compare]
3449 | __pyx_t_3 = (__pyx_v_source_size < (sizeof(uint32_t)));
| ^
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