| """Triples are a way to define information about a platform/system. This module provides |
| a way to convert a triple string into a well structured object to avoid constant string |
| parsing in starlark code. |
| |
| Triples can be described at the following link: |
| https://clang.llvm.org/docs/CrossCompilation.html#target-triple |
| """ |
| |
| def triple(triple): |
| """Constructs a struct containing each component of the provided triple |
| |
| Args: |
| triple (str): A platform triple. eg: `x86_64-unknown-linux-gnu` |
| |
| Returns: |
| struct: |
| - arch (str): The triple's CPU architecture |
| - vendor (str): The vendor of the system |
| - system (str): The name of the system |
| - abi (str, optional): The abi to use or None if abi does not apply. |
| - triple (str): The original triple |
| """ |
| if triple == "wasm32-wasi": |
| return struct( |
| arch = "wasm32", |
| system = "wasi", |
| vendor = "wasi", |
| abi = None, |
| triple = triple, |
| ) |
| |
| component_parts = triple.split("-") |
| if len(component_parts) < 3: |
| fail("Expected target triple to contain at least three sections separated by '-'") |
| |
| cpu_arch = component_parts[0] |
| vendor = component_parts[1] |
| system = component_parts[2] |
| abi = None |
| |
| if len(component_parts) == 4: |
| abi = component_parts[3] |
| |
| return struct( |
| arch = cpu_arch, |
| vendor = vendor, |
| system = system, |
| abi = abi, |
| triple = triple, |
| ) |
