Re: Compile error on the aarch64 platform: Missing asm/hwcap.h

I wrote:
> ... I'm inclined to think
> it's better to do something like

> +#if defined(__linux__) && (defined(__aarch64__) ? !defined(HWCAP_CRC32) : !defined(HWCAP2_CRC32))

> or perhaps that's too unreadable and we should break it out into
> multiple #if's.

I tried it as a nest of #ifdef's and decided that was none too
readable either, so pushed it as above.  Thanks for the report!

            regards, tom lane