10000 devguide/porting.rst at 04edcf341b801ff42d2db6c7927e99747aa06bc6 · python/devguide · GitHub
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class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003ePorting Python to a new platform\u003c/h1\u003e\u003ca id=\"user-content-porting-python-to-a-new-platform\" class=\"anchor\" aria-label=\"Permalink: Porting Python to a new platform\" href=\"#porting-python-to-a-new-platform\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eThe first step is to familiarize yourself with the development toolchain on\nthe platform in question, notably the C compiler. Make sure you can compile and\nrun a hello-world program using the target compiler.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eNext, learn how to compile and run the Python interpreter on a platform to\nwhich it has already been ported; preferably Unix, but Windows will\ndo, too. The build process for Python, in particular the \u003ccode\u003eMakefile\u003c/code\u003e in the\nsource distribution, will give you a hint on which files to compile\nfor Python. Not all source files are relevant: some are platform\nspecific, others are only used in emergencies (e.g. \u003ccode\u003egetopt.c\u003c/code\u003e).\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eIt is not recommended to start porting Python without at least medium-level\nunderstanding of your target platform; i.e. how it is generally used, how to\nwrite platform specific apps, etc. Also, some Python knowledge is required, or\nyou will be unable to verify that your port is working correctly.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eYou will need a \u003ccode\u003epyconfig.h\u003c/code\u003e file tailored for your platform. You can\nstart with \u003ccode\u003epyconfig.h.in\u003c/code\u003e, read the comments, and turn on definitions that\napply to your platform. Also, you will need a \u003ccode\u003econfig.c\u003c/code\u003e file, which lists\nthe built-in modules you support. Again, starting with\n\u003ccode\u003eModules/config.c.in\u003c/code\u003e is recommended.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eFinally, you will run into some things that are not supported on your\ntarget platform. Forget about the \u003ccode\u003eposix\u003c/code\u003e module in the beginning. You can\nsimply comment it out of the \u003ccode\u003econfig.c\u003c/code\u003e file.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eKeep working on it until you get a \u003ccode\u003e\u0026gt;\u0026gt;\u0026gt;\u003c/code\u003e prompt. You may have to disable the\nimporting of \u003ccode\u003esite.py\u003c/code\u003e by passing the \u003ccode\u003e-S\u003c/code\u003e option. When you have a prompt,\nbang on it until it executes very simple Python statements.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eAt some point you will want to use the \u003ccode\u003eos\u003c/code\u003e module; this is the time to start\nthinking about what to do with the \u003ccode\u003eposix\u003c/code\u003e module. It is okay to simply\ncomment out functions in the \u003ccode\u003eposix\u003c/code\u003e module that cause problems; the\nremaining ones will be quite useful.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eBefore you are done, it is highly recommended to run the Python regression test\nsuite, as described in \u003ca href=\"#id1\"\u003e\u003cspan id=\"user-content-id2\"\u003e:ref:`runtests`\u003c/span\u003e\u003c/a\u003e.\u003c/p\u003e\n\n\u003c/article\u003e","renderedFileInfo":null,"shortPath":null,"symbolsEnabled":true,"tabSize":8,"topBannersInfo":{"overridingGlobalFundingFile":false,"globalPreferredFundingPath":"/python/.github/blob/5a0a7cb55767fb3667fe2391bcb66bda638edcb4/FUNDING.yml","showInvalidCitationWarning":false,"citationHelpUrl":"https://docs.github.com/github/creating-cloning-and-archiving-repositories/creating-a-repository-on-github/about-citation-files","actionsOnboardingTip":null},"truncated":false,"viewable":true,"workflowRedirectUrl":null,"symbols":{"timed_out":false,"not_analyzed":true,"symbols":[]}},"copilotInfo":null,"copilotAccessAllowed":false,"modelsAccessAllowed":false,"modelsRepoIntegrationEnabled":false,"csrf_tokens":{"/python/devguide/branches":{"post":"Z49P01NkrZc2oq3TYscbLrF0tRZx5Uq4PLHzgKgCEHRzjTL4gXcz5RDAgU9hwCVdWuJTMDm6CMY5Vh9Bv0K7WA"},"/repos/preferences":{"post":"DL3NlRFFFDMm4GQhvlZH7jgC-oBu-WncOEX9hCG6cwlMgWDkvOtKccx5wVQLIz3fRrhgfwQsYEZvMnzHzRP6Pg"}}},"title":"devguide/porting.rst at 04edcf341b801ff42d2db6c7927e99747aa06bc6 · python/devguide","appPayload":{"helpUrl":"https://docs.github.com","findFileWorkerPath":"/assets-cdn/worker/find-file-worker-7d7eb7c71814.js","findInFileWorkerPath":"/assets-cdn/worker/find-in-file-worker-1ae9fa256942.js","githubDevUrl":null,"enabled_features":{"code_nav_ui_events":false,"react_blob_overlay":false,"accessible_code_button":true,"github_models_repo_integration":false}}}
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