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# TensorFlow in Go
Construct and execute TensorFlow graphs in Go.
[](https://godoc.org/github.com/tensorflow/tensorflow/tensorflow/go)
> *WARNING*: The API defined in this package is not stable and can change
> without notice. The same goes for the package path:
> (`github.com/tensorflow/tensorflow/tensorflow/go`).
## Quickstart
Refer to [Installing TensorFlow for Go](https://www.tensorflow.org/install/lang_go)
## Building the TensorFlow C library from source
If the "Quickstart" instructions above do not work (perhaps the release archives
are not available for your operating system or architecture, or you're using a
different version of CUDA/cuDNN), then the TensorFlow C library must be built
from source.
### Prerequisites
- [bazel](https://www.bazel.build/versions/master/docs/install.html)
- Environment to build TensorFlow from source code
([Linux of macOS](https://www.tensorflow.org/install/source)).
If you don't need GPU support, then try the following:
```sh
sudo apt-get install python swig python-numpy # Linux
brew install swig # OS X with homebrew
```
### Build
1. Download the source code
```sh
go get -d github.com/tensorflow/tensorflow/tensorflow/go
```
2. Build the TensorFlow C library:
```sh
cd ${GOPATH}/src/github.com/tensorflow/tensorflow
./configure
bazel build -c opt //tensorflow:libtensorflow.so
```
This can take a while (tens of minutes, more if also building for GPU).
3. Make `libtensorflow.so` available to the linker. This can be done by either:
a. Copying it to a system location, e.g.,
```sh
sudo cp ${GOPATH}/src/github.com/tensorflow/tensorflow/bazel-bin/tensorflow/libtensorflow.so /usr/local/lib
```
OR
b. Setting environment variables:
```sh
export LIBRARY_PATH=${GOPATH}/src/github.com/tensorflow/tensorflow/bazel-bin/tensorflow
# Linux
export LD_LIBRARY_PATH=${GOPATH}/src/github.com/tensorflow/tensorflow/bazel-bin/tensorflow
# OS X
export DYLD_LIBRARY_PATH=${GOPATH}/src/github.com/tensorflow/tensorflow/bazel-bin/tensorflow
```
4. Build and test:
```sh
go test github.com/tensorflow/tensorflow/tensorflow/go
```
### Generate wrapper functions for ops
Go functions corresponding to TensorFlow operations are generated in `op/wrappers.go`. To regenerate them:
Prerequisites:
- [Protocol buffer compiler (protoc) 3.x](https://github.com/google/protobuf/releases/)
- The TensorFlow repository under GOPATH
```sh
go generate github.com/tensorflow/tensorflow/tensorflow/go/op
```
## Support
Use [stackoverflow](http://stackoverflow.com/questions/tagged/tensorflow) and/or
[Github issues](https://github.com/tensorflow/tensorflow/issues).
## Contributions
Contributions are welcome. If making any signification changes, probably best to
discuss on a [Github issue](https://github.com/tensorflow/tensorflow/issues)
before investing too much time. Github pull requests are used for contributions.
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