fetch-configlet scripts: Add arm64 support #122
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Aug 16, 2023
Add a script to install Zig, and add a job to the build workflow that
uses `zig cc` to cross compile configlet for arm64 (AKA aarch64) Linux.
This means that the next configlet release will have two new release
assets:
configlet_4.0.0-beta.14_linux_arm64.tar.gz
configlet_4.0.0-beta.14_linux_arm64.tar.gz.minisig
and extracting the archive will yield the executable:
$ file ./configlet
./configlet: ELF 64-bit LSB executable, ARM aarch64, version 1 (SYSV), statically linked, stripped
Also support running `nimble build -d:zig` locally.
For now, the new executable has a large comment section:
$ readelf -p .comment ./configlet
String dump of section '.comment':
[ 0] clang version 16.0.6 (https://github.com/ziglang/zig-bootstrap 1dda86241204c4649f668d46b6a37feed707c7b4)
[...] (repeat for 39 KiB)
[ 8d82] clang version 16.0.6 (https://github.com/ziglang/zig-bootstrap 1dda86241204c4649f668d46b6a37feed707c7b4)
[ 8deb] Linker: LLD 16.0.6
Try to strip it later. Our `strip` doesn't support elf64-aarch64 as a
target, and `zig objcopy` doesn't have a `-R, --remove-section` option
currently. But prepare to use `llvm-strip`.
Cross-compiling for arm64 macos currently produces an error:
CC: ../nimdir/lib/std/sysrand.nim
/home/runner/.cache/nim/configlet_r/@m..@snimdir@slib@sstd@ssysrand.nim.c:9:10:
fatal error: 'Security/SecRandom.h' file not found
which is due to a recent commit [1].
See some posts on cross-compiling with Zig [2][3][4] and the support table [5].
Refs: #24
Refs: #122
Refs: #764
[1] 53a75a2 ("nimble, uuid: generate UUIDs via std/sysrand, not pragmagic/uuids", 2023-08-07)
[2] https://ziglang.org/learn/overview/#cross-compiling-is-a-first-class-use-case
[3] https://andrewkelley.me/post/zig-cc-powerful-drop-in-replacement-gcc-clang.html
[4] https://www.uber.com/blog/bootstrapping-ubers-infrastructure-on-arm64-with-zig/
[5] https://ziglang.org/download/0.11.0/release-notes.html#Support-Table
ee7
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Aug 17, 2023
Continue the recent `zig cc` work [1], such that the next configlet
release will have two new release assets:
configlet_4.0.0-beta.14_macos_arm64.tar.gz
configlet_4.0.0-beta.14_macos_arm64.tar.gz.minisig
where the archive contains the executable:
$ file ./configlet
configlet: Mach-O 64-bit arm64 executable, flags:<NOUNDEFS|DYLDLINK|TWOLEVEL|PIE|HAS_TLV_DESCRIPTORS>
`configlet uuid` now uses [2] `std/sysrand`, which on macOS uses [3] the
Security Framework. So to produce the macOS arm64 configlet, it's
easiest to cross-compile from macOS x86_64, where the macOSX SDK is
already available. Make the cross-compile and install-zig scripts
support macOS, and add a build job for it.
It looks like the macos-12 GitHub runner has SDK versions 12.3 and 13.1
installed. Use the latest one.
The new executable is about 1.09 MiB, which is notably larger than the
655 KiB macOS x86_64 executable. Possible ways to reduce the size in
the future:
- Enable LTO when `zig ld` supports it [4].
- Compile it natively, when GitHub begins to provide a hosted arm64
macOS runner [5].
- Compile it natively, using a non-GitHub arm64 macOS runner.
Refs: #24
Refs: #122
Refs: #764
[1] 0e8d665, ".github, config: use Zig to cross-compile arm64 Linux asset", 2023-08-13
[2] 53a75a2, "nimble, uuid: generate UUIDs via std/sysrand, not pragmagic/uuids", 2023-08-07
[3] https://github.com/nim-lang/Nim/blob/v2.0.0/lib/std/sysrand.nim#L235-L256
[4] https://www.github.com/ziglang/zig/issues/8680
[5] https://www.github.com/github/roadmap/issues/528
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ee7
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Aug 18, 2023
Continue the recent `zig cc` work [1][2][3], such that the next
configlet release will have two new release assets:
configlet_4.0.0-beta.14_windows_arm64.zip
configlet_4.0.0-beta.14_windows_arm64.zip.minisig
where the archive contains the executable:
$ file ./configlet.exe
./configlet: PE32+ executable (console) Aarch64, for MS Windows, 6 sections
The aarch64-windows-gnu target will have Tier 1 Zig support [4].
Also make the cross-compilation jobs and scripts work on Windows, even
though we currently cross-compile the new executable from Linux.
Refs: #24
Refs: #122
Closes: #764
[1] 0e8d665, 2023-08-16, ".github, config: use Zig to cross-compile arm64 Linux asset"
[2] f280445, 2023-08-17, ".github: cross-compile arm64 macOS asset"
[3] a962b18, 2023-08-17, ".github: cross-compile riscv64 Linux asset"
[4] https://ziglang.org/download/0.11.0/release-notes.html#Support-Table
ee7
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This was referenced Aug 19, 2023
ee7
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Aug 22, 2023
The most recent configlet release [1] includes pre-built binaries for: - arm64 Linux [2] - arm64 macOS [3] - arm64 Windows [4] - riscv64 Linux [5] Support arm64 in the bash fetch-configlet script. Refs: #122 [1] https://github.com/exercism/configlet/releases/tag/4.0.0-beta.14 [2] 0e8d665, 2023-08-16, ".github, config: use Zig to cross-compile arm64 Linux asset" [3] f280445, 2023-08-17, ".github: cross-compile arm64 macOS asset" [4] 3824299, 2023-08-18, ".github, cli, completion: cross-compile arm64 Windows asset" [5] a962b18, 2023-08-17, ".github: cross-compile riscv64 Linux asset"
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Similar to issue #24, but for the fetch scripts (which already have 32-bit support).
The v2
configletreleased ARM binaries, but the fetch-configlet script there never supported downloading them.This will become a more important issue as more people start using the latest ARM-based Mac machines with the Apple M1 chip.
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