Hi,
+.abiversion 2I'd prefer that was left to the compiler flags.
Problem is that it's the compiler that is responsible for providing this directive in the intermediate .s prior invoking the assembler. And there is no assembler flag to pass through -Wa. If concern is ABI neutrality, then solution would rather be #if (_CALL_ELF-0) == 2/#endif. One can also make a case for
#ifdef _CALL_ELF .abiversion _CALL_ELF #endif Cheers.