| Brian Silverman | cc09f18 | 2022-03-09 15:40:20 -0800 | [diff] [blame^] | 1 | """Triples are a way to define information about a platform/system. This module provides |
| 2 | a way to convert a triple string into a well structured object to avoid constant string |
| 3 | parsing in starlark code. |
| 4 | |
| 5 | Triples can be described at the following link: |
| 6 | https://clang.llvm.org/docs/CrossCompilation.html#target-triple |
| 7 | """ |
| 8 | |
| 9 | def triple(triple): |
| 10 | """Constructs a struct containing each component of the provided triple |
| 11 | |
| 12 | Args: |
| 13 | triple (str): A platform triple. eg: `x86_64-unknown-linux-gnu` |
| 14 | |
| 15 | Returns: |
| 16 | struct: |
| 17 | - arch (str): The triple's CPU architecture |
| 18 | - vendor (str): The vendor of the system |
| 19 | - system (str): The name of the system |
| 20 | - abi (str, optional): The abi to use or None if abi does not apply. |
| 21 | - triple (str): The original triple |
| 22 | """ |
| 23 | if triple == "wasm32-wasi": |
| 24 | return struct( |
| 25 | arch = "wasm32", |
| 26 | system = "wasi", |
| 27 | vendor = "wasi", |
| 28 | abi = None, |
| 29 | triple = triple, |
| 30 | ) |
| 31 | |
| 32 | component_parts = triple.split("-") |
| 33 | if len(component_parts) < 3: |
| 34 | fail("Expected target triple to contain at least three sections separated by '-'") |
| 35 | |
| 36 | cpu_arch = component_parts[0] |
| 37 | vendor = component_parts[1] |
| 38 | system = component_parts[2] |
| 39 | abi = None |
| 40 | |
| 41 | if system == "androideabi": |
| 42 | system = "android" |
| 43 | abi = "eabi" |
| 44 | |
| 45 | if len(component_parts) == 4: |
| 46 | abi = component_parts[3] |
| 47 | |
| 48 | return struct( |
| 49 | arch = cpu_arch, |
| 50 | vendor = vendor, |
| 51 | system = system, |
| 52 | abi = abi, |
| 53 | triple = triple, |
| 54 | ) |