On 19 April 2016 at 14:47, Laurent Thévenoux <laurent.theven...@ens-lyon.fr> wrote: > 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> 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/ > > > 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
Ah, indeed sorry I assumed it was a compiler issue and stop the compilation after cc1 (option -S), and the error messages are given by the assembler, which comes from binutils version 2.24 in our 4.9.4 binary release, whereas it is binutils version 2.25 in GCC 5 ones. The commit which fixed this issue in 2.25 is this one: https://sourceware.org/ml/binutils/2014-11/msg00135.html _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-dev
