golang

Golang Bindings

In order to build the underlying ICICLE libraries you should run the build script build.sh found in the wrappers/golang directory.

Build script USAGE

./build.sh [-curve=<curve> | -field=<field>] [-cuda_version=<version>] [-g2] [-ecntt] [-devmode]

curve - The name of the curve to build or "all" to build all curves
field - The name of the field to build or "all" to build all fields
-g2 - Optional - build with G2 enabled 
-ecntt - Optional - build with ECNTT enabled
-devmode - Optional - build in devmode

To build ICICLE libraries for all supported curves with G2 and ECNTT enabled.

./build.sh all -g2 -ecntt

If you wish to build for a specific curve, for example bn254, without G2 or ECNTT enabled.

./build.sh bn254

Note

Current supported curves are bn254, bls12_381, bls12_377, bw6_671 and grumpkin Current supported fields are babybear

Note

G2 and ECNTT are located in nested packages

Running golang tests

To run the tests for curve bn254.

go test ./wrappers/golang/curves/bn254 -count=1

To run all the tests in the golang bindings

go test ./... -count=1

How do Golang bindings work?

The libraries produced from the CUDA code compilation are used to bind Golang to ICICLE's CUDA code.

1. These libraries (named libingo_curve_<curve>.a and libingo_field_<curve>.a) can be imported in your Go project to leverage the GPU accelerated functionalities provided by ICICLE.

2. In your Go project, you can use cgo to link these libraries. Here's a basic example on how you can use cgo to link these libraries:

/*
#cgo LDFLAGS: -L$/path/to/shared/libs -lingo_curve_bn254 -L$/path/to/shared/libs -lingo_field_bn254 -lstdc++ -lm
#include "icicle.h" // make sure you use the correct header file(s)
*/
import "C"

func main() {
    // Now you can call the C functions from the ICICLE libraries.
    // Note that C function calls are prefixed with 'C.' in Go code.
}

Replace /path/to/shared/libs with the actual path where the shared libraries are located on your system.

Common issues

Cannot find shared library

In some cases you may encounter the following error, despite exporting the correct LD_LIBRARY_PATH.

/usr/local/go/pkg/tool/linux_amd64/link: running gcc failed: exit status 1
/usr/bin/ld: cannot find -lbn254: No such file or directory
/usr/bin/ld: cannot find -lbn254: No such file or directory
/usr/bin/ld: cannot find -lbn254: No such file or directory
/usr/bin/ld: cannot find -lbn254: No such file or directory
/usr/bin/ld: cannot find -lbn254: No such file or directory
collect2: error: ld returned 1 exit status

This is normally fixed by exporting the path to the shared library location in the following way: export CGO_LDFLAGS="-L/<path_to_shared_lib>/"

cuda_runtime.h: No such file or directory

# github.com/ingonyama-zk/icicle/v2/wrappers/golang/curves/bls12381
In file included from wrappers/golang/curves/bls12381/curve.go:5:
wrappers/golang/curves/bls12381/include/curve.h:1:10: fatal error: cuda_runtime.h: No such file or directory
    1 | #include <cuda_runtime.h>
      |          ^~~~~~~~~~~~~~~~
compilation terminated.

Our golang bindings rely on cuda headers and require that they can be found as system headers. Make sure to add the cuda/include of your cuda installation to your CPATH

export CPATH=$CPATH:<path/to/cuda/include>