[3.14] gh-156112: Load the ObjC runtime by name when find_library() cannot resolve it (GH-156113) (#156216)
freakboy3742 <[email protected]>
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https://github.com/python/cpython/commit/f89e637fdf4641d5a1e8eb3da56b164bcb9bb3df commit: f89e637fdf4641d5a1e8eb3da56b164bcb9bb3df branch: 3.14 author: Miss Islington (bot) <[email protected]> committer: freakboy3742 <[email protected]> date: 2026-08-22T04:17:22Z summary: [3.14] gh-156112: Load the ObjC runtime by name when find_library() cannot resolve it (GH-156113) (#156216) Provides a fallback name for the ObjC runtime library on iOS, and improved error handling when that library cannot be loaded. (cherry picked from commit 918fb3aec907baf8d9b6181570ff308529be16a3) Co-authored-by: Clément Péron <[email protected]> files: A Misc/NEWS.d/next/Library/2026-08-20-13-50-49.gh-issue-156112.yEcma8.rst M Lib/_ios_support.py diff --git a/Lib/_ios_support.py b/Lib/_ios_support.py index 20467a7c2bcaeb..cc51aa504916e3 100644 --- a/Lib/_ios_support.py +++ b/Lib/_ios_support.py @@ -10,12 +10,15 @@ else: # ctypes is available. Load the ObjC library, and wrap the objc_getClass, # sel_registerName methods - lib = util.find_library("objc") - if lib is None: - # Failed to load the objc library - raise ImportError("ObjC runtime library couldn't be loaded") + # find_library() resolves a system library through the dyld shared cache, + # which needs _dyld_shared_cache_contains_path(); that is unavailable before + # iOS 14, so fall back to the bare name, which dyld resolves by itself. + lib = util.find_library("objc") or "libobjc.dylib" - objc = cdll.LoadLibrary(lib) + try: + objc = cdll.LoadLibrary(lib) + except OSError: + raise ImportError("ObjC runtime library couldn't be loaded") objc.objc_getClass.restype = c_void_p objc.objc_getClass.argtypes = [c_char_p] objc.sel_registerName.restype = c_void_p diff --git a/Misc/NEWS.d/next/Library/2026-08-20-13-50-49.gh-issue-156112.yEcma8.rst b/Misc/NEWS.d/next/Library/2026-08-20-13-50-49.gh-issue-156112.yEcma8.rst new file mode 100644 index 00000000000000..ba92df3c5cb6c1 --- /dev/null +++ b/Misc/NEWS.d/next/Library/2026-08-20-13-50-49.gh-issue-156112.yEcma8.rst @@ -0,0 +1,4 @@ +:mod:`!_ios_support` no longer fails to import when +:func:`ctypes.util.find_library` cannot resolve the ObjC runtime through the +dyld shared cache, as is the case on iOS 13. The runtime is now loaded by name, +which dyld resolves against the cache directly. _______________________________________________ Python-checkins mailing list -- [email protected] To unsubscribe send an email to [email protected] https://mail.python.org/mailman3//lists/python-checkins.python.org Member address: [email protected]