BUG: fix ISO C compliance #431
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In ISO C, at least one argument should be specified for the "..." argument of a function-like macro. Signed-off-by: Cheng Qiao <admin@cismon.net>
drakenclimber
approved these changes
Aug 15, 2024
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Merged via 5eb0b07, thanks! |
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When macro
_SCMP_VA_NUM_ARGSis invoked with one argument, it expands to_SCMP_VA_NUM_ARGS_IMPLwith only 3 arguments specified.Compilers like gcc and clang support empty variadic macro argument as a language extension, however, in ISO C, at least one argument should be specified for the
...argument of a function-like macro (See ISO/IEC 9899:1999 6.10.3(4)).This patch should make the code more standard-compliant, and silences certain compiler warnings (e.g. clang
-Wgnu-zero-variadic-macro-arguments)Note: there are other non-standard code (e.g. void pointer arithmetic), but not addressed in this patch. It's okay for projects to use language extensions, but less so in public headers.