Compile issues on RPi 32 bit since commit d46bc7b2d176f7efc71eaaedd9aefa8850ab5efa

[ScallyBag]

Hi Amanj,

Since commit d46bc7b I cannot compile Zahak without removing the -mavx from the CFLAGS in fathom.go

Al@RPi4-SSD:~/Engine-Source/zahak-nnue $ make -j5
go clean ./...
rm -f engine/nn.go
CC=cc CGO_ENABLED="1" go run -gcflags "-B" -ldflags "-X 'main.netPath=default.nn' -X 'main.Version=3253478557873477dc3908536cc02ca9e1a6b447'" netgen/nn.go
mkdir -p bin
CC=cc CGO_ENABLED="1" go build -gcflags "-B" -o bin ./...

github.com/amanjpro/zahak/fathom

cc: error: unrecognized command line option '-mavx'; did you mean '-marm'?
make: *** [Makefile:31: build] Error 2

———-

Al@RPi4-SSD:~/Engine-Source/zahak-nnue $ make cross-build -j5
go clean ./...
rm -f engine/nn.go
mkdir -p bin
echo "!!!! WARNING !!!! Cross build will not support Syzygy Probing"
!!!! WARNING !!!! Cross build will not support Syzygy Probing
CC=cc CGO_ENABLED="1" go run -ldflags "-X 'main.netPath=default.nn' -X 'main.Version=7.1'" netgen/nn.go
CC=cc CGO_ENABLED="1" GOOS=linux GOARCH=arm go build -gcflags "-B" -o bin ./... && mv bin/zahak bin/zahak-linux-arm32

github.com/amanjpro/zahak/fathom

cc: error: unrecognized command line option '-mavx'; did you mean '-marm'?
make: *** [Makefile:62: cross-build] Error 2
Al@RPi4-SSD:~/Engine-Source/zahak-nnue $

———-

However when I remove this flag, I can compile for 32 bit ONLY, I get these errors on trying the cross-build make

Al@RPi4-SSD:~/Engine-Source/zahak-nnue $ make cross-build -j5
go clean ./...
rm -f engine/nn.go
mkdir -p bin
echo "!!!! WARNING !!!! Cross build will not support Syzygy Probing"
!!!! WARNING !!!! Cross build will not support Syzygy Probing
CC=cc CGO_ENABLED="1" go run -ldflags "-X 'main.netPath=default.nn' -X 'main.Version=7.1'" netgen/nn.go
CC=cc CGO_ENABLED="1" GOOS=linux GOARCH=arm go build -gcflags "-B" -o bin ./... && mv bin/zahak bin/zahak-linux-arm32
CC=cc CGO_ENABLED="1" GOOS=linux GOARCH=arm64 go build -gcflags "-B" -o bin ./... && mv bin/zahak bin/zahak-linux-arm64

runtime/cgo

In file included from _cgo_export.c:4:
cgo-gcc-export-header-prolog:25:14: error: size of array ‘_check_for_64_bit_pointer_matching_GoInt’ is negative
make: *** [Makefile:63: cross-build] Error 2

———-

Thanks,

Al.

[amanjpro]

Ah... I can disable Syzygy in RPi builds, after all Syzygy is useless under RPi, due to the slow disk access

[ScallyBag]

Ok if you think that helps. however I use 3-4-5 piece syzygy tables on all engines that support it. My RPi systems run from SSD drives with M.2 drives as backups.

[amanjpro]

Ok, then I can literally copy fathom.go one to compile for avx, the other not
depending if it is targeting RPi or not

[amanjpro]

I'll fix that in version 8.1