go compilation on ARM (aarch64) with goC and dynamic link

[Christophe Valmir]

Hello I tried to compile a Go program on ARM with dynamic link.

Why dynamic? Because the libs I use in C are proprietary and the constructor does not want to compile in static.

I build like this:

export PATH=$PATH:/home/ronron/aml_npu_sdk_6.4.3/toolchains/
export CGO_ENABLED=1
export LIB_DIR=$TOOLCHAIN/../aarch64-linux-gnu/libc/lib
export ROOTSDK=/home/ronron/aml_npu_sdk_6.4.3/
export VIVANTE_SDK_INC="/home/ronron/aml_npu_sdk_6.4.3/linux_sdk/linux_sdk_6.4.2.1/build/sdk/include"
export AQROOT="/home/ronron/aml_npu_sdk_6.4.3/linux_sdk/linux_sdk_6.4.3/build"
export OVXLIB_DIR="$ROOTSDK/linux_sdk/linux_sdk_6.4.3/acuity-ovxlib-dev"
export OPENCV_ROOT="/home/ronron/aml_npu_sdk_6.4.3/linux_sdk/linux_sdk_6.4.0.10/build/sdk/opencv3-3.4.3"
export CGO_CFLAGS="-I$VIVANTE_SDK_INC -I$VIVANTE_SDK_INC/HAL -I$AQROOT/sdk/inc  -I./ -I$OVXLIB_DIR/include/utils -I$OVXLIB_DIR/include/client  -I$OVXLIB_DIR/include/ops -I$OVXLIB_DIR/include -I$OVXLIB_DIR/third-party/jpeg-9b -DgcdSTATIC_LINK=0"
export CGO_CPPFLAGS="-I$VIVANTE_SDK_INC -I$VIVANTE_SDK_INC/HAL -I$AQROOT/sdk/inc  -I./ -I$OVXLIB_DIR/include/utils -I$OVXLIB_DIR/include/client  -I$OVXLIB_DIR/include/ops -I$OVXLIB_DIR/include -I$OVXLIB_DIR/third-party/jpeg-9b -DgcdSTATIC_LINK=0"
export CGO_LDFLAGS=" -lpthread -ldl -L$OVXLIB_DIR/lib -L $OPENCV_ROOT/lib -L$AQROOT/sdk/lib -L/home/ronron/aml_npu_sdk_6.4.3/linux_sdk/linux_sdk_6.4.3/build/sdk/drivers_32 -ljpeg -lovxlib -L$VIVANTE_SDK_LIB -lOpenVX  -lovxlib  -shared   -lopencv_imgproc -lopencv_core -lopencv_videoio -lopencv_imgcodecs -lopencv_highgui -lz -lm"
go build  -linkshared  -a

when I run program:

rron:~/test_go$ strace ./test_go te
execve("./test_go", ["./test_go", "te"], 0x7ff746a528 /* 27 vars */) = 0
--- SIGILL {si_signo=SIGILL, si_code=ILL_ILLOPC, si_addr=0x7fadb45000} ---
+++ killed by SIGILL +++
Illegal instruction

I don't make crosscompiling and I don't see my error :( one idea ?

[Christophe Valmir]

I make a test with small program and it's a option " -shared" only into CGO_LDFLAGS  which causes me problem.

If I don't use it of course I can't use dynamic libs. Do you think the libstd.so program?

ron:~/test_go$ ldd ./test_go
    linux-vdso.so.1 (0x0000007f87ebc000)
    libstd.so => /home/ron/go-1.5/pkg/linux_arm64_dynlink/libstd.so (0x0000007f857e9000)
    libdl.so.2 => /lib/aarch64-linux-gnu/libdl.so.2 (0x0000007f857c0000)
    libpthread.so.0 => /lib/aarch64-linux-gnu/libpthread.so.0 (0x0000007f85790000)
    libc.so.6 => /lib/aarch64-linux-gnu/libc.so.6 (0x0000007f8561d000)
    /lib/ld-linux-aarch64.so.1 (0x0000007f87e8c000)

[Christophe Valmir]

Something else interesting :

ron :~/inceptionv3/test_go$ ldd ./test_go
    linux-vdso.so.1 (0x0000007f7a3d1000)
    libstd.so => not found
ron :~/inceptionv3/test_go$ ./test_go
Illegal instruction
ron :~/inceptionv3/test_go$ file  ./test_go
./test_go: ELF 64-bit LSB shared object, ARM aarch64, version 1 (SYSV), dynamically linked, Go BuildID=fW09jr3tjA78E5z6UAUz/bPYMiN2NZHGu_lvhfvko/fIPbh6IEkrveNgcnIXTL/VbfOnD9J9BmSEbkH06qe, BuildID[sha1]=c62d3a4e50902a4d21777d41df33a41e5d6df6f6, not stripped

I thinks there are big problem XD

[Christophe Valmir]

I'm not getting along :)
The -linkshared option creates a lib not an executable, otherwise it works.