Hi Yvan, > Le 19 avr. 2016 à 13:46, Yvan Roux <yvan.r...@linaro.org> a écrit : > > Hi Laurent, > > On 19 April 2016 at 11:00, Laurent Thévenoux > <laurent.theven...@ens-lyon.fr <mailto:laurent.theven...@ens-lyon.fr>> wrote: >> Dear Devs, >> >> I get the following error when I use gcc 4.9.4 with the -mcpu flag set with >> a certain configuration of ‘feature/nofeature’, i.e.: >> -mcpu=cortex-a57+fp+simd+nocrypto+nocrc will fail, but >> -mcpu=cortex-a57+fp+nocrypto+simd+nocrc won’t, for example. >> >> Here the error I get with the former -mcpu flag: >> >> Assembler messages: >> Error: unknown architectural extension `n' >> Error: unrecognized option -mcpu=cortex-a57+fp+simd+n >> >> >> Minimal test case: $gcc -march=armv8-a+fp+simd+nocrc+nocrypto >> -mcpu=cortex-a57+fp+simd+nocrypto+nocrc -mtune=cortex-a57 helloworld.c. >> >> According to the gcc documentation >> <https://gcc.gnu.org/onlinedocs/gcc-4.9.3/gcc/AArch64-Options.html#AArch64-Options> >> the order seems to be irrelevant. I obtained the error with the linaro-gcc >> 4.9.4 binary release, as well as a personal built from linaro sources >> package. It also fails with gcc 4.9.2 on the 3.18.0-linaro-hikey debian >> distribution. >> >> I also tried with (linaro) gcc 4.8.5, 5.1.1, 5.2.1, and 5.3.1 versions, and >> it works well. > > On which version of GCC 4.9.4 do you see that issue ? I can't > reproduce with our latest 4.9.4 release (4.9-2016.02) which is > available here: > > https://releases.linaro.org/components/toolchain/binaries/4.9-2016.02/aarch64-linux-gnu/ > > <https://releases.linaro.org/components/toolchain/binaries/4.9-2016.02/aarch64-linux-gnu/>
I think I have the latest one, -v gives me: gcc version 4.9.4 20151028 (prerelease) (Linaro GCC 4.9-2016.02). Moreover, I downloaded the version from your link, and I reproduce the issue with : $ ./gcc-linaro-4.9-2016.02-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-gcc -march=armv8-a+fp+simd+nocrc+nocrypto -mcpu=cortex-a57+fp+simd+nocrypto+nocrc -mtune=cortex-a57 helloworld.c Assembler messages: Error: unknown architectural extension `n' Error: unrecognized option -mcpu=cortex-a57+fp+simd+n > > FYI, in GCC 5 this part of the code was highly refactored and enhanced. > > Cheers, > Yvan > >> Do I have to open a bug report for this, or maybe, I just misunderstood >> something, somewhere? >> >> Regards, >> Laurent Thévenoux >> >> _______________________________________________ >> linaro-dev mailing list >> linaro-dev@lists.linaro.org >> https://lists.linaro.org/mailman/listinfo/linaro-dev
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