//mojo:toolchain.bzl

This file declares the mojo_toolchain rule.

`mojo_toolchain`

mojo_toolchain(name, LD_LIBRARY_PATH, MODULAR_HOME, MOJO_CC_PATH, MOJO_COMPILER,
               MOJO_PYTHON_LIBRARY, symbolizer)

Name	Description
`name`	`Name`, required. A unique name for this target.
`LD_LIBRARY_PATH`	`Label`, optional, defaults to `None`. -
`MODULAR_HOME`	`Label`, optional, defaults to `None`. -
`MOJO_CC_PATH`	`Label`, optional, defaults to `None`. -
`MOJO_COMPILER`	`Label`, optional, defaults to `None`. The path to the mojo compiler.
`MOJO_PYTHON_LIBRARY`	`Label`, optional, defaults to `None`. -
`symbolizer`	`Label`, optional, defaults to `“@llvm-project//llvm:llvm-symbolizer ”`. The `llvm-symbolizer`.