opentofu/BUILDING.md

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Building from Source

If you'd like to build OpenTofu from source, you can do so using the Go build toolchain and the options specified in this document.

Prerequisites

  1. Ensure you've installed the Go language version specified in .go-version.
  2. Clone this repository to a location of your choice.

OpenTofu Build Options

OpenTofu accepts certain options passed using ldflags at build time which control the behavior of the resulting binary.

Dev Version Reporting

OpenTofu will include a -dev flag when reporting its own version (ex: 1.5.0-dev) unless version.dev is set to no:

go build -ldflags "-w -s -X 'github.com/opentofu/opentofu/version.dev=no'" -o bin/ ./cmd/tofu

Experimental Features

Experimental features of OpenTofu will be disabled unless main.experimentsAllowed is set to yes:

go build -ldflags "-w -s -X 'main.experimentsAllowed=yes'" -o bin/ ./cmd/tofu

Go Options

For the most part, the OpenTofu release process relies on the Go toolchain defaults for the target operating system and processor architecture.

CGO_ENABLED

One exception is the CGO_ENABLED option, which is set explicitly when building OpenTofu binaries. For most platforms, we build with CGO_ENABLED=0 in order to produce a statically linked binary. For MacOS/Darwin operating systems, we build with CGO_ENABLED=1 to avoid a platform-specific issue with DNS resolution.