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Aelin
79bb9f71e7
`powerpc64-unknown-linux-gnu` currently is an ELFv1 target, while `powerpc64-unknown-linux-musl` is an ELFv2 target. Big-endian and little-endian ELFv2 targets both behave normally: they emit `.note.GNU-stack`. Therefore, currently the tests would fail on big-endian powerpc64 with ELFv2 ABI. To determine whether we need to special-case powerpc64, we should check the ABI instead of the endianness. The problem here is that the `e_flags` part of the ELF header is actually `0` in the output of `cc -O0 -ffunction-sections -fdata-sections -fPIC -m64 -mabi=elfv2 -Wall -Wextra -o missing_gnu_stack_section.o -c missing_gnu_stack_section.S`, the output of that command is bit-for-bit identical on ELFv1 and ELFv2 hosts. In order to know when to allow an unset `.note.GNU-stack` we therefore must set `.abiversion 2` to be able to tell them apart from the ELF header. This makes all tests pass on `powerpc64-unknown-linux-musl`.