Re: Does ARMEL toolchain include NEON support?
On Wed, Feb 27, 2019 at 02:16:46PM -0500, Jeffrey Walton wrote:
>Hi Everyone,
>
>I'm investigating a failed build for ARMEL. I don't have access to the
>build machine so I have to study the logs or ask our package
>maintainer to run commands for us.
>
>The build log is at
>https://buildd.debian.org/status/package.php?p=libcrypto%2B%2B&suite=experimental
>(package) and https://buildd.debian.org/status/fetch.php?pkg=libcrypto%2B%2B&arch=armel&ver=8.1.0-1&stamp=1551251751&raw=0
>(ARMEL).
>
>We have tried to use -mfpu=neon and -mfloat-abi=softfp or
>-mfloat-abi=hard for the NEON specific files but both produce compile
>failures. "NEON specific files" are ones with the name *_simd.cpp,
>like aria_simd.cpp.
>
>I test the build locally with about 6 ARM dev-boards and have not
>encountered the problem. However, all of the dev-board are hard float
>machines.
OK. In your build log I can see
n file included from aria_simd.cpp:19:
/usr/lib/gcc/arm-linux-gnueabi/8/include/arm_neon.h:31:2: error: #error "NEON intrinsics not available with the soft-float ABI. Please use -mfloat-abi=softfp or -mfloat-abi=hard"
#error "NEON intrinsics not available with the soft-float ABI. Please use -mfloat-abi=softfp or -mfloat-abi=hard"
What errors do you get if you try -mfloat-abi=softfp (etc.)?
To be able to use NEON support you may also have to specify a CPU/FPU
combination that includes it - the default armel setup it for ARMv5
which is not going to help you.
--
Steve McIntyre, Cambridge, UK. steve@einval.com
"I can't ever sleep on planes ... call it irrational if you like, but I'm
afraid I'll miss my stop" -- Vivek Das Mohapatra
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