On 28 July 2016 at 00:42, Jeffrey Walton wrote: > This is kind of weird, but I think there's a disconnect in my > understanding of things. CRC can be enabled with the following: > > $ gcc -g3 -O0 -march=armv8-a+crc -mfpu=neon test.cc -o test.exe > $ > > However, the Crypto stuff fails to compile: > > $ gcc -g3 -O0 -march=armv8-a+crc+crypto -mfpu=neon test.cc -o test.exe > gcc: error: unrecognized argument in option ‘-march=armv8-a+crc+crypto’ > > So the question becomes, how do I enable the Crypto extensions? Have you tried -mfpu=crypto-neon-fp-armv8 ? That's the only occurrence of "crypto" in the manual page you linked to, so it seems like a good bet.
