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Check compatibility with macOS deployment target during JIT builds #134291
Description
As with #100384, we should ensure that symbols use is guarded or the interpreter will crash at runtime on older macOS platforms.
There are a couple violations for a target of 10.15 (which we agreed on in #128155):
cpython-3.14> Python/jit.c:530:5: error: 'pthread_jit_write_protect_np' is only available on macOS 11.0 or newer [-Werror,-Wunguarded-availability-new]
cpython-3.14> 530 | pthread_jit_write_protect_np(0);
cpython-3.14> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
cpython-3.14> /Applications/Xcode_15.2.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.2.sdk/usr/include/pthread.h:588:6: note: 'pthread_jit_write_protect_np' has been marked as being introduced in macOS 11.0 here, but the deployment target is macOS 10.15.0
cpython-3.14> 588 | void pthread_jit_write_protect_np(int enabled);
cpython-3.14> | ^
cpython-3.14> Python/jit.c:530:5: note: enclose 'pthread_jit_write_protect_np' in a __builtin_available check to silence this warning
cpython-3.14> 530 | pthread_jit_write_protect_np(0);
cpython-3.14> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
cpython-3.14> Python/jit.c:570:5: error: 'pthread_jit_write_protect_np' is only available on macOS 11.0 or newer [-Werror,-Wunguarded-availability-new]
cpython-3.14> 570 | pthread_jit_write_protect_np(1);
cpython-3.14> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
cpython-3.14> /Applications/Xcode_15.2.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.2.sdk/usr/include/pthread.h:588:6: note: 'pthread_jit_write_protect_np' has been marked as being introduced in macOS 11.0 here, but the deployment target is macOS 10.15.0
cpython-3.14> 588 | void pthread_jit_write_protect_np(int enabled);
cpython-3.14> | ^
cpython-3.14> Python/jit.c:570:5: note: enclose 'pthread_jit_write_protect_np' in a __builtin_available check to silence this warning
cpython-3.14> 570 | pthread_jit_write_protect_np(1);
cpython-3.14> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
cpython-3.14> 2 errors generated.
Activity
pythongh-134291: Add `unguarded-availability` check to JIT builds
GH-134291: Support older macOS deployment targets for JIT builds (GH-…
[3.14] GH-134291: Support older macOS deployment targets for JIT buil…
pythonGH-134291: Support older macOS deployment targets for JIT builds (
hugovk commentedon Aug 21, 2025
@zanieb Anything still to do here, or can we close this?
[3.14] pythonGH-134291: Support older macOS deployment targets for JI…