[3.8] bpo-41100: Support macOS 11 Big Sur and Apple Silicon Macs #25806
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This is a partial backport of bpo-41100 changes `e8b1c038b14b5fc8120aab62c9bf5fb840274cb6` and `96d906b144e6e6aa96c5ffebecbcc5d38034bbda` for Python 3.8. We introduce the ability to build Python from source for `arm64` on macOS, but we do not make a promise of support. This allows us to omit support for Universal2 binaries as well as weak-linking of symbols from the macOS SDK based on the deployment target, which are larger changes much more difficult to merge. This also includes a backport of subsequent bpo-42688 change `7e729978fa08a360cbf936dc215ba7dd25a06a08` to fix build errors with external `libffi`.
…thonGH-23301) (pythonGH-23455) On macOS system provided libraries are in a shared library cache and not at their usual location. This PR teaches distutils to search in the SDK, even if there was no "-sysroot" argument in the compiler flags. (cherry picked from commit 404a719) Co-authored-by: Ronald Oussoren <ronaldoussoren@mac.com>
macOS releases numbering has changed as of macOS 11 Big Sur. Previously, major releases were of the form 10.x, 10.x+1, 10.x+2, etc; as of Big Sur, they are now x, x+1, etc, so, for example, 10.15, 10.15.1, ..., 10.15.7, 11, 11.0.1, 11.1, ..., 12, 12.1, etc. Allow Python to build with single-digit deployment target values. Patch provided by FX Coudert. (cherry picked from commit 5291639) Co-authored-by: FX Coudert <fxcoudert@gmail.com>
…a string (pythonGH-24341) (pythonGH-24410) * bpo-42504: Ensure that get_config_var('MACOSX_DEPLOYMENT_TARGET') is a string (cherry picked from commit 49926cf) Co-authored-by: Ronald Oussoren <ronaldoussoren@mac.com>
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pythonGH-25806 was a python 3.8 backport of pythonGH-22855 to support macOS 11, but didn't backport the changes that enabled building python with a new macOS SDK and target an older macOS version. This commit adds support for that.
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This is a partial backport of changes in Python 3.9.1 to support building and running on macOS 11 (Big Sur) and on Apple Silicon (
arm64) Macs. Besides building native single-architecture binaries on either Intel or Apple Silicon Macs, a newuniversal2build option is added witharm64andx86_64fat binaries that run natively on either CPU type.Note that support for "weaklinking" - building binaries targeted for newer
versions of macOS that will also run correctly on older versions by
testing at runtime for missing features - is not included in this backport
from Python 3.9. To support a range of macOS versions on 3.8, continue to target
for and build on the oldest version in the range.
(Originally contributed by Ronald Oussoren and Lawrence D'Anna in bpo-41100,
with fixes by FX Coudert (bpo-42504) and Eli Rykoff (bpo-42688), and backported
to 3.8 by Maxime Bélanger and Ned Deily)
https://bugs.python.org/issue41100