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Enable PGO and native builds for aarch64-unknown-linux-gnu - #484

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Enable PGO and native builds for aarch64-unknown-linux-gnu#484
zanieb wants to merge 7 commits into
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zb/native-aarch64

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@zanieb

@zanieb zanieb commented Jan 7, 2025

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@zanieb zanieb added platform:linux Specific to the Linux platform arch:aarch64 labels Jan 7, 2025
@indygreg

indygreg commented Jan 8, 2025

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We currently don't use a modern LLVM toolchain for Linux aarch64. As a result we won't get the same optimizations from PGO or LTO.

It may just work though since the CPython configure should resolve the appropriate compiler flags from the detected toolchain.

We can look into adopting modern LLVM on Linux ARM separately.

@zanieb

zanieb commented Jan 8, 2025

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@indygreg Are you sure? Perhaps I'm misunderstanding but it looks like we cross-compile with LLVM 19

python-build-standalone/pythonbuild/utils.py

Lines 423 to 436 in 0be0a57

def clang_toolchain(host_platform: str, target_triple: str) -> str:
if host_platform == "linux64":
# musl currently has issues with LLVM 15+.
if "musl" in target_triple:
return "llvm-14-x86_64-linux"
else:
return "llvm-19-x86_64-linux"
elif host_platform == "macos":
if platform.mac_ver()[2] == "arm64":
return "llvm-aarch64-macos"
else:
return "llvm-x86_64-macos"
else:
raise Exception("unhandled host platform")

https://github.com/astral-sh/python-build-standalone/actions/runs/12677576491/job/35333290679

@zanieb zanieb mentioned this pull request Feb 12, 2025
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@zanieb

zanieb commented Mar 20, 2025

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Okay after some poking around this is blocked by the Dockerfile which cannot be built on aarch64 yet.

@zanieb zanieb mentioned this pull request May 14, 2025
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@zanieb zanieb mentioned this pull request Jul 1, 2025
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zanieb commented Jul 1, 2025

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See #670

@zanieb zanieb closed this Jul 1, 2025
zanieb added a commit that referenced this pull request Aug 28, 2025
@zanieb
Add support for aarch64 musl (#569)
fd9784e 
Closes #87 

Does not include the `+static` variant as I was having a hard time
getting the bzip2 build passing. I'll open a new issue to track that.

Related #484
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@zanieb @indygreg