一开始想用docker安装, 结果拉取的镜像CPU架构不对，无法启动。
nbs@kylin-pc:~/桌面$ sudo docker pull ghcr.io/silkeh/clang:21-trixie
输入密码
21-trixie: Pulling from silkeh/clang
0b233165d073: Pull complete
bce2073474a5: Pull complete
c7a5eef2ddc9: Pull complete
Digest: sha256:8c5aee059ffdc87dcf5d177f50fbf85602568e42d1580e41b01d8a4e7563c65d
Status: Downloaded newer image for ghcr.io/silkeh/clang:21-trixie
ghcr.io/silkeh/clang:21-trixie
nbs@kylin-pc:~/桌面$ sudo docker run -itd -v /home/nbs/par:/par --network=host --name clang21 ghcr.io/silkeh/clang:21-trixie
WARNING: The requested image's platform (linux/amd64) does not match the detected host platform (linux/arm64/v8) and no specific platform was requested
648b20a8afb2517453fab6287f60060b07893f07869cd6cf87b2a8523b4cd70d改用apt来安装，先进入一个空的ubuntu容器。先修改apt源为清华源，然后依次执行apt update，apt install clang。
nbs@kylin-pc:~/桌面$ sudo docker start ubuntu26
ubuntu26
nbs@kylin-pc:~/桌面$ sudo docker exec -it ubuntu26 bash
root@kylin-pc:/# vi /etc/apt/sources.list
bash: vi: command not found
root@kylin-pc:/# mv /etc/apt/sources.list /etc/apt/sources.list.old
# 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ resolute main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ resolute main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ resolute-updates main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ resolute-updates main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ resolute-backports main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ resolute-backports main restricted universe multiverse
# 以下安全更新软件源为官方源配置
deb http://security.ubuntu.com/ubuntu/ resolute-security main restricted universe multiverse
# deb-src http://security.ubuntu.com/ubuntu/ resolute-security main restricted universe multiverse
# 预发布软件源，不建议启用
# deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ resolute-proposed main restricted universe multiverse
# # deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ resolute-proposed main restricted universe multiverse
root@kylin-pc:/# cp /par/sources.list /etc/apt/sources.list
root@kylin-pc:/# apt update
Get:1 https://mirrors.tuna.tsinghua.edu.cn/ubuntu resolute InRelease [136 kB]
...
Get:24 http://ports.ubuntu.com/ubuntu-ports resolute-security/main arm64 Packages [60.1 kB]
Fetched 24.0 MB in 4s (6087 kB/s)
18 packages can be upgraded. Run 'apt list --upgradable' to see them.
Notice: Some sources can be modernized. Run 'apt modernize-sources' to do so.
root@kylin-pc:/# apt install clang
Upgrading:
libc-bin libc-gconv-modules-extra libc6
Installing:
clang
Installing dependencies:
binfmt-support gcc-15-base libclang-cpp21 libffi-dev libjansson4 libobjc4 libubsan1 llvm-21-linker-tools python3-yaml
binutils libasan8 libclang-rt-21-dev libgc1 libllvm21 libpfm4 libxml2-dev llvm-21-runtime rpcsvc-proto
binutils-aarch64-linux-gnu libbinutils libclang1-21 libgcc-15-dev liblsan0 libpipeline1 libyaml-0-2 llvm-21-tools zlib1g-dev
binutils-common libc-dev-bin libctf-nobfd0 libgprofng0 liblzma-dev libsframe3 linux-libc-dev manpages
clang-21 libc6-dev libctf0 libhwasan0 libncurses-dev libstdc++-15-dev llvm-21 manpages-dev
clang-tools-21 libclang-common-21-dev libedit2 libitm1 libobjc-15-dev libtsan2 llvm-21-dev python3-pygments
Suggested packages:
binutils-doc binutils-gold wasi-libc glibc-doc ncurses-doc pkgconf man-browser ttf-bitstream-vera
gprofng-gui clang-21-doc libc-devtools liblzma-doc libstdc++-15-doc llvm-21-doc python-pygments-doc
Summary:
Upgrading: 3, Installing: 52, Removing: 0, Not Upgrading: 15
Download size: 168 MB
Space needed: 928 MB / 140 GB available
Continue? [Y/n]
...
Setting up clang (1:21.1.6-71) ...
Setting up llvm-21-dev (1:21.1.8-6ubuntu1) ...
Processing triggers for libc-bin (2.43-2ubuntu2) ...
root@kylin-pc:/# clang --version
Ubuntu clang version 21.1.8 (6ubuntu1)
Target: aarch64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/lib/llvm-21/bin安装的版本是21.1.8。
然后用sqlite3源码测试clang编译。比gcc编译的sqlite3运行速度要慢一点。
root@kylin-pc:/# cd /par/sqlite*8
root@kylin-pc:/par/sqlite-20260511102558-45a2152908# clang shell.c sqlite3.c -O3 -lpthread -lm -ldl -o sqlite3cl
root@kylin-pc:/par/sqlite-20260511102558-45a2152908# time ./sqlite3cl < ../sum.sql
╭──────────────────╮
│ sum(value) │
╞══════════════════╡
│ 5000000050000000 │
╰──────────────────╯
real 0m3.057s
user 0m3.039s
sys 0m0.001s
root@kylin-pc:/par/sqlite-20260511102558-45a2152908# time ./sqlite3o2 < ../sum.sql
╭──────────────────╮
│ sum(value) │
╞══════════════════╡
│ 5000000050000000 │
╰──────────────────╯
real 0m2.599s
user 0m2.574s
sys 0m0.004s检查python版本，建立虚拟环境，设定codon安装目录为搜索路径，用pip安装codon-jit模块。
root@kylin-pc:/# python3
Python 3.14.4 (main, Apr 8 2026, 04:02:31) [GCC 15.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>
root@kylin-pc:/par/tpy3145# python/bin/python -m venv codonenv
root@kylin-pc:/par/tpy3145# source codonenv/bin/activate
(codonenv) root@kylin-pc:/par/tpy3145# export PATH=/par/codon/bin:$PATH
(codonenv) root@kylin-pc:/par/tpy3145# pip install codon-jit --no-index -f ../tpy314/314
Looking in links: ../tpy314/314
Processing /par/tpy314/314/codon_jit-0.4.6.tar.gz
Installing build dependencies ... done
Getting requirements to build wheel ... done
Preparing metadata (pyproject.toml) ... done
Processing /par/tpy314/314/cython-3.2.4-cp314-cp314-manylinux2014_aarch64.manylinux_2_17_aarch64.manylinux_2_28_aarch64.whl (from codon-jit)
Processing /par/tpy314/314/astunparse-1.6.3-py2.py3-none-any.whl (from codon-jit)
Processing /par/tpy314/314/wheel-0.47.0-py3-none-any.whl (from astunparse->codon-jit)
Processing /par/tpy314/314/six-1.17.0-py2.py3-none-any.whl (from astunparse->codon-jit)
Processing /par/tpy314/314/packaging-26.2-py3-none-any.whl (from wheel<1.0,>=0.23.0->astunparse->codon-jit)
Building wheels for collected packages: codon-jit
Building wheel for codon-jit (pyproject.toml) ... done
Created wheel for codon-jit: filename=codon_jit-0.4.6-cp314-cp314-linux_aarch64.whl size=108289 sha256=afb7a1ccdf2f0c1719a4242aeac4d795401da68c1bc1dd62c2664041c396e146
Stored in directory: /root/.cache/pip/wheels/9f/36/32/3748d95f34594fa442964a7d1b6f99f14360459c5ca6a36caf
Successfully built codon-jit
Installing collected packages: six, packaging, cython, wheel, astunparse, codon-jit
Successfully installed astunparse-1.6.3 codon-jit-0.4.6 cython-3.2.4 packaging-26.2 six-1.17.0 wheel-0.47.0执行测试脚本报错，缺少numpy，安装后就能够执行了。
(codonenv) root@kylin-pc:/par/tpy3145# time python ../test-codonjit.py
Traceback (most recent call last):
File "/par/tpy3145/../test-codonjit.py", line 1, in <module>
import codon
File "/par/tpy3145/codonenv/lib/python3.14/site-packages/codon/__init__.py", line 7, in <module>
from .decorator import jit, convert, execute, JITError, JITWrapper, _jit_register_fn, _jit_callback_fn, _jit
File "/par/tpy3145/codonenv/lib/python3.14/site-packages/codon/decorator.py", line 13, in <module>
import numpy as np
ModuleNotFoundError: No module named 'numpy'
real 0m0.062s
user 0m0.049s
sys 0m0.012s
(codonenv) root@kylin-pc:/par/tpy3145# pip install numpy --no-index -f ../tpy314/314
Looking in links: ../tpy314/314
Processing /par/tpy314/314/numpy-2.4.4-cp314-cp314-manylinux_2_27_aarch64.manylinux_2_28_aarch64.whl
Installing collected packages: numpy
Successfully installed numpy-2.4.4
(codonenv) root@kylin-pc:/par/tpy3145# time python ../test-codonjit.py
[python] 8392 | took 56.61279606819153 seconds
[codon] 8392 | took 3.6273505687713623 seconds
real 1m10.909s
user 1m10.861s
sys 0m0.638s
(codonenv) root@kylin-pc:/par/tpy3145# time codon run ../test-codon.py
[python] 8392 | took 1.32626 seconds
real 0m3.896s
user 0m4.436s
sys 0m0.143s
(codonenv) root@kylin-pc:/par/tpy3145# time codon run --release ../test-codon.py
[python] 8392 | took 1.39554 seconds
real 0m3.903s
user 0m4.487s
sys 0m0.076s但是build二进制文件不行。报g++错误，但已经生成了test-codon.o目标文件。
(codonenv) root@kylin-pc:/par/tpy3145# time codon build --release ../test-codon.py
error: process for 'g++' exited with status 255
real 0m2.461s
user 0m3.045s
sys 0m0.109s
(codonenv) root@kylin-pc:/par/tpy3145# clang ../test-codon.o -o ../test-codoncl
/usr/bin/aarch64-linux-gnu-ld.bfd: ../test-codon.o: in function `main':
test-codon.py:(.text+0x24): undefined reference to `seq_init'
/usr/bin/aarch64-linux-gnu-ld.bfd: test-codon.py:(.text+0x28): undefined reference to `seq_stdout'
/usr/bin/aarch64-linux-gnu-ld.bfd: test-codon.py:(.text+0x30): undefined reference to `seq_stdin'
...
/usr/bin/aarch64-linux-gnu-ld.bfd: test-codon.py:(.text+0x150): undefined reference to `seq_alloc_atomic'
/usr/bin/aarch64-linux-gnu-ld.bfd: test-codon.py:(.text+0x1c8): undefined reference to `seq_print_full'
/usr/bin/aarch64-linux-gnu-ld.bfd: test-codon.py:(.text+0x1dc): undefined reference to `seq_print_full'
/usr/bin/aarch64-linux-gnu-ld.bfd: ../test-codon.o:(.data.DW.ref.seq_personality[DW.ref.seq_personality]+0x0): undefined reference to `seq_personality'
clang: error: linker command failed with exit code 1 (use -v to see invocation)想用clang代替g++链接.o文件，也不行。