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bpo-44689: ctypes.util.find_library() now finds macOS 11+ system libraries when built on older macOS systems #27251

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Merged
ned-deily merged 7 commits into from
Aug 30, 2021
Merged

bpo-44689: ctypes.util.find_library() now finds macOS 11+ system libraries when built on older macOS systems #27251

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0858c0c
Add _ctypes.shared_library_is_loadable. Remove _ctypes._dyld_shared_c…
bergkvist Jul 20, 2021
b7aa289
Fix test_ctypes for Windows.
bergkvist Jul 20, 2021
00388a2
📜🤖 Added by blurb_it.
blurb-it[bot] Jul 20, 2021
9d3c834
bpo-44689: Remove dlopen in find_library. Load _dyld_shared_cache_con…
bergkvist Jul 27, 2021
01bcf2b
Update Misc/NEWS.d/next/macOS/2021-07-20-22-27-01.bpo-44689.mmT_xH.rst
bergkvist Jul 27, 2021
52473a4
bpo-44689: Revert to using weak linking implementation. Only use dyna…
bergkvist Aug 6, 2021
dfcc357
bpo-44689: edit NEWS blurb and comment
ned-deily Aug 30, 2021
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bpo-44689: edit NEWS blurb and comment
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@ned-deily
ned-deily committed Aug 30, 2021
commit dfcc35789e97e94a8ae04650ef39fc08f33ecc7d
7 changes: 5 additions & 2 deletions Misc/NEWS.d/next/macOS/2021-07-20-22-27-01.bpo-44689.mmT_xH.rst
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Original file line number Diff line number Diff line change
@@ -1,2 +1,5 @@
You can now compile Python on MacOS < 11.0 and
:meth:`ctypes.util.find_library` will still work on MacOS >= 11.0.
:meth:`ctypes.util.find_library` now works correctly on macOS 11 Big Sur
even if Python is built on an older version of macOS. Previously, when
built on older macOS systems, ``find_library`` was not able to find
macOS system libraries when running on Big Sur due to changes in
how system libraries are stored.
2 changes: 1 addition & 1 deletion Modules/_ctypes/callproc.c
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Expand Up @@ -1447,7 +1447,7 @@ copy_com_pointer(PyObject *self, PyObject *args)
#define HAVE_DYLD_SHARED_CACHE_CONTAINS_PATH_RUNTIME \
__builtin_available(macOS 11.0, iOS 14.0, tvOS 14.0, watchOS 7.0, *)
#else
// Support the deprecated case of compiling on an older MacOS version
// Support the deprecated case of compiling on an older macOS version
static void *libsystem_b_handle;
static bool (*_dyld_shared_cache_contains_path)(const char *path);

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