On Thu, Jul 28, 2016 at 4:56 AM, Jonathan Wakely <jwakely.gcc@xxxxxxxxx> wrote: > 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 ? No. I avoided it because the _fp_/-fp- signals single precision floats, which this unit does not use. But it turned out it was neded. Jeff
