ci: add a github action ci to test Rust std::autodiff #2430

sgasho · 2025-08-31T05:46:44Z

closes: #2429
related: rust-lang/rust#145899

result of act dry-run

act -n -W .github/workflows/enzyme-rust.yml -P self-hosted=ubuntu-latest -P Linux=ubuntu-latest -P X64=ubuntu-latest -P 32-core=ubuntu-latest
INFO[0000] Using docker host 'unix:///var/run/docker.sock', and daemon socket 'unix:///var/run/docker.sock' 
WARN  ⚠ You are using Apple M-series chip and you have not specified container architecture, you might encounter issues while running act. If so, try running it with '--container-architecture linux/amd64'. ⚠  
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 19-1] ⭐ Run Set up job
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 19-1] 🚀  Start image=ubuntu-latest
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 20-2] ⭐ Run Set up job
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 20-2] 🚀  Start image=ubuntu-latest
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 20-2]   🐳  docker pull image=ubuntu-latest platform= username= forcePull=true
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 19-1]   🐳  docker pull image=ubuntu-latest platform= username= forcePull=true
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 20-2]   🐳  docker create image=ubuntu-latest platform= entrypoint=["tail" "-f" "/dev/null"] cmd=[] network="host"
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 20-2]   🐳  docker run image=ubuntu-latest platform= entrypoint=["tail" "-f" "/dev/null"] cmd=[] network="host"
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 20-2]   ✅  Success - Set up job
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 19-1]   🐳  docker create image=ubuntu-latest platform= entrypoint=["tail" "-f" "/dev/null"] cmd=[] network="host"
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 19-1]   🐳  docker run image=ubuntu-latest platform= entrypoint=["tail" "-f" "/dev/null"] cmd=[] network="host"
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 19-1]   ✅  Success - Set up job
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 19-1] 🧪  Matrix: map[llvm:19]
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 20-2] 🧪  Matrix: map[llvm:20]
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 19-1] ⭐ Run Main Install LLVM and dependencies
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 20-2] ⭐ Run Main Install LLVM and dependencies
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 20-2]   ✅  Success - Main Install LLVM and dependencies [3.041958ms]
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 19-1]   ✅  Success - Main Install LLVM and dependencies [3.560292ms]
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 20-2] ⭐ Run Main Install Rust toolchain
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 19-1] ⭐ Run Main Install Rust toolchain
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 20-2]   ✅  Success - Main Install Rust toolchain [2.436583ms]
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 19-1]   ✅  Success - Main Install Rust toolchain [2.396541ms]
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 20-2] ⭐ Run Main Checkout Enzyme
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 19-1] ⭐ Run Main Checkout Enzyme
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 19-1]   ✅  Success - Main Checkout Enzyme [1.037666ms]
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 20-2]   ✅  Success - Main Checkout Enzyme [1.382292ms]
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 19-1] ⭐ Run Main Build Enzyme
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 20-2] ⭐ Run Main Build Enzyme
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 20-2]   ✅  Success - Main Build Enzyme [2.28875ms]
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 19-1]   ✅  Success - Main Build Enzyme [2.499958ms]
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 20-2] ⭐ Run Main Clone and configure Rust compiler
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 19-1] ⭐ Run Main Clone and configure Rust compiler
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 19-1]   ✅  Success - Main Clone and configure Rust compiler [2.189917ms]
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 20-2]   ✅  Success - Main Clone and configure Rust compiler [2.093583ms]
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 19-1] ⭐ Run Main Build Rust compiler stage 1
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 20-2] ⭐ Run Main Build Rust compiler stage 1
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 20-2]   ✅  Success - Main Build Rust compiler stage 1 [2.484125ms]
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 19-1]   ✅  Success - Main Build Rust compiler stage 1 [2.589625ms]
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 19-1] ⭐ Run Main Run Rust autodiff tests
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 20-2] ⭐ Run Main Run Rust autodiff tests
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 20-2]   ✅  Success - Main Run Rust autodiff tests [2.293625ms]
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 20-2] ⭐ Run Complete job
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 20-2] Cleaning up container for job Rust Autodiff Tests LLVM 20
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 19-1]   ✅  Success - Main Run Rust autodiff tests [2.496792ms]
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 19-1] ⭐ Run Complete job
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 19-1] Cleaning up container for job Rust Autodiff Tests LLVM 19
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 19-1]   ✅  Success - Complete job
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 19-1] 🏁  Job succeeded
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 20-2]   ✅  Success - Complete job
*DRYRUN* [Enzyme Rust CI/Rust Autodiff Tests LLVM 20-2] 🏁  Job succeeded

wsmoses · 2025-08-31T15:26:17Z

.github/workflows/enzyme-rust.yml

+      run: |
+        curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
+        source ~/.cargo/env
+        rustup toolchain install nightly


until Rust adds CI for Enzyme, I think this should be fixed to a specific commit

.github/workflows/enzyme-rust.yml

wsmoses · 2025-08-31T15:27:10Z

.github/workflows/enzyme-rust.yml

+jobs:
+  rust-autodiff:
+    name: Rust Autodiff Tests LLVM ${{ matrix.llvm }}
+    runs-on: [self-hosted, Linux, X64, 32-core]


this is not the correct setup for the runner, see https://github.com/EnzymeAD/Enzyme/blob/main/.github/workflows/enzyme-mlir.yml for an example

it needs to run on linux-x86-n2-32

wsmoses · 2025-09-01T01:19:45Z

.github/workflows/enzyme-rust.yml

+        cmake ../enzyme -DLLVM_EXTERNAL_LIT=`which lit` -DCMAKE_BUILD_TYPE=Release -DLLVM_DIR=/usr/lib/llvm-${{ matrix.llvm }}/lib/cmake/llvm
+        make -j `nproc` LLVMEnzyme-${{ matrix.llvm }}
+    - name: Clone and configure Rust compiler
+      run: |


this is never told to use the enzyme we built above?

wsmoses · 2025-09-01T01:19:59Z

.github/workflows/enzyme-rust.yml

+        source ~/.cargo/env
+        git clone --depth 1 --branch master https://github.com/rust-lang/rust.git
+        cd rust
+        ./configure --enable-llvm-link-shared --enable-llvm-plugins --enable-llvm-enzyme --release-channel=nightly --enable-llvm-assertions --enable-clang --enable-lld --enable-option-checking --enable-ninja --disable-docs


we should also use ccache here, and cache intermediate artifacts

sgasho · 2025-09-01T15:43:17Z

@wsmoses @ZuseZ4
Thank you so much for the review!
However, I'm sorry for being a beginner at GitHub Actions and Enzyme and I'm not sure how to properly fix about some comments, especially

#2430 (comment)
#2430 (comment)
#2430 (comment)

Could you give me some hints, examples, suggestions, or something I should study?
I did some commits, but I'm not confident, especially wip

wsmoses · 2025-09-02T14:07:22Z

@ZuseZ4 can you help @sgasho understand the next steps from the comments?

ZuseZ4 · 2025-09-02T17:49:19Z

I have no experience with ccache and to me it sounds like something that should be added in a follow-up pr to avoid feature creep. But it looks like you've already added it in your last commit? If it works I guess it should stay.

For the pinning of the version, I would assume we want to fix the rustc we build, and not necessarily the rust version we use to build rustc. It's fine to do both, but right now you only pin the version used to build. You should also check out a specific commit of github.com/rust-lang/rust instead of just the master branch. This way, we can verify that new Enzyme versions don't break support. We would update the rustc commit every once in a while. This way, an update to rustc can't break Enzyme CI.

I don't know whats the relevant difference between your. yml file and the mlir example given, so I'd leave that for Billy to answer.

I-Al-Istannen · 2025-09-02T21:10:01Z

.github/workflows/enzyme-rust.yml

+        echo "CC=ccache gcc" >> $GITHUB_ENV
+        echo "CXX=ccache g++" >> $GITHUB_ENV


Who uses this? What exactly is built using GCC? I think Rust still uses LLVM. The rust invocation will prefix its invocations with ccache by itself as far as I can see, thanks to the --enable-ccache a few lines above.

.github/workflows/enzyme-rust.yml

I-Al-Istannen · 2025-09-02T21:14:04Z

.github/workflows/enzyme-rust.yml

+      run: |
+        . ~/.cargo/env
+        rm -rf build && mkdir build && cd build
+        RUST_LLVM_DIR=${GITHUB_WORKSPACE}/rust/build/x86_64-unknown-linux-gnu/llvm


I would shell-quote this. GitHub probably has no space or special chars in the checkout dir, but better be safe.

I shell-quoted it in this commit!
use quotes

I-Al-Istannen · 2025-09-02T21:19:01Z

.github/workflows/enzyme-rust.yml

+      run: |
+        curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
+        . ~/.cargo/env
+        # Pin to specific nightly commit for reproducibility


What is this used for? Rustc bootstrap? Might be worth it to add a comment saying what is now reproducible. Enzyme itself is built against the latest rust compiler (you check out the main branch of rust-lang/rust), so I imagine it won't really help there?

wsmoses · 2025-09-03T14:44:12Z

.github/workflows/enzyme-rust.yml


    container:
-      image: ${{ (contains(matrix.os, 'linux') && 'ghcr.io/enzymead/reactant-docker-images@sha256:91e1edb7a7c869d5a70db06e417f22907be0e67ca86641d48adcea221fedc674' ) || '' }}
+      image: ${{ (contains(matrix.os, 'linux') && 'ghcr.io/enzymead/reactant-docker-images:main' ) || '' }}


this should use the specific hash, not main

wsmoses · 2025-09-03T18:32:10Z

.github/workflows/enzyme-rust.yml

+    - name: Install dependencies
+      run: |
+        apt-get update
+        apt-get install -y binutils ninja-build cmake gcc g++ python3 python3-dev ccache nodejs npm


do you need all these deps?

wsmoses · 2025-09-03T18:33:00Z

.github/workflows/enzyme-rust.yml

+        . ~/.cargo/env
+        git clone https://github.com/rust-lang/rust.git
+        cd rust
+        git checkout 51ff895062ba60a7cba53f57af928c3fb7b0f2f4


can you move the commit to the matrix? that'll make it easier to update, and or if in the future we want to checkout multiple and/or stable tags

ZuseZ4 · 2025-09-05T19:45:57Z

This currently builds Enzyme twice, once as part of rustc and once standalone.
Unfortunately it uses the old one from rustc for testing.
Is there a way to delete the default Enzyme submodule and re-add it using the new Enzyme source code which we have here (e.g. through ln -s or copying)? Then you can stop to build it seperately and we use the normal rust infra for building it.

.github/workflows/enzyme-rust.yml

wsmoses · 2025-09-08T13:01:02Z

.github/workflows/enzyme-rust.yml

+    - name: Clone and configure Rust compiler
+      run: |
+        . ~/.cargo/env
+        git clone https://github.com/rust-lang/rust.git


you should use another actions/checkout for this [and can give it the relevant tag/commit]

ZuseZ4 · 2025-09-10T17:06:56Z

@wsmoses this looks ready? Can you run CI, I don't have permission

wsmoses · 2025-09-20T22:28:58Z

.github/workflows/enzyme-rust.yml

+          --enable-clang \
+          --enable-lld \
+          --disable-optimize-llvm \
+          --enable-option-checking \


we should use the github actions cache here, but lets see if it builds first

otherwise ccache doesn't do anything as the run is ephemeral

wsmoses · 2025-09-20T23:26:01Z

fails

CMAKE_TOOLCHAIN_FILE_x86_64-unknown-linux-gnu = None
CMAKE_TOOLCHAIN_FILE_x86_64_unknown_linux_gnu = None
HOST_CMAKE_TOOLCHAIN_FILE = None
CMAKE_TOOLCHAIN_FILE = None
CMAKE_PREFIX_PATH_x86_64-unknown-linux-gnu = None
CMAKE_PREFIX_PATH_x86_64_unknown_linux_gnu = None
HOST_CMAKE_PREFIX_PATH = None
CMAKE_PREFIX_PATH = None
CMAKE_x86_64-unknown-linux-gnu = None
CMAKE_x86_64_unknown_linux_gnu = None
HOST_CMAKE = None
CMAKE = None
running: cd "/__w/Enzyme/Enzyme/rust/build/x86_64-unknown-linux-gnu/enzyme/build" && CMAKE_PREFIX_PATH="" DESTDIR="" LC_ALL="C" LLVM_CONFIG_REAL="/__w/Enzyme/Enzyme/rust/build/x86_64-unknown-linux-gnu/llvm/bin/llvm-config" "cmake" "/__w/Enzyme/Enzyme/rust/src/tools/enzyme/enzyme/" "-G" "Ninja" "-DCMAKE_INSTALL_MESSAGE=LAZY" "-DCMAKE_C_COMPILER_LAUNCHER=ccache" "-DCMAKE_CXX_COMPILER_LAUNCHER=ccache" "-DCMAKE_C_COMPILER=cc" "-DCMAKE_CXX_COMPILER=c++" "-DCMAKE_ASM_COMPILER=cc" "-DCMAKE_C_FLAGS=-ffunction-sections -fdata-sections -fPIC -m64" "-DCMAKE_CXX_FLAGS=-ffunction-sections -fdata-sections -fPIC -m64" "-DCMAKE_SHARED_LINKER_FLAGS=" "-DCMAKE_MODULE_LINKER_FLAGS=" "-DCMAKE_EXE_LINKER_FLAGS=" "-DLLVM_ENABLE_ASSERTIONS=ON" "-DENZYME_EXTERNAL_SHARED_LIB=ON" "-DENZYME_BC_LOADER=OFF" "-DLLVM_DIR=/__w/Enzyme/Enzyme/rust/build/x86_64-unknown-linux-gnu/llvm" "-DCMAKE_INSTALL_PREFIX=/__w/Enzyme/Enzyme/rust/build/x86_64-unknown-linux-gnu/enzyme" "-DCMAKE_ASM_FLAGS= -ffunction-sections -fdata-sections -fPIC -m64" "-DCMAKE_BUILD_TYPE=Debug"
CMake Error: The source directory "/__w/Enzyme/Enzyme/rust/src/tools/enzyme/enzyme" does not exist.
Specify --help for usage, or press the help button on the CMake GUI.

thread 'main' panicked at /root/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/cmake-0.1.54/src/lib.rs:1119:5:

ZuseZ4 · 2025-09-26T14:22:23Z

@sgasho Not sure if it's related, or needed but you can also try to do a submodule update for enzyme and commit it.

wsmoses · 2025-09-26T23:42:02Z

Run source ~/.cargo/env
Run '/home/runner/k8s/index.js'
using script executor
/__w/_temp/4f4ab6b8-84af-4b9c-8304-d6f25cfb5572.sh: 1: source: not found
Error: Error: ScriptExecutorError when trying to execute: "Error: Job failed with exit code 127."
Error: Process completed with exit code 1.
Error: Executing the custom container implementation failed. Please contact your self hosted runner admini

ZuseZ4 · 2025-10-01T20:30:18Z

@sgasho Looks like you managed it! The last test is failing, but that one frequently changes the IR generated, not sure if it's because of rustc, LLVM, or Enzyme changing. I'll look into making it more robust, it's not like that feature (batching) is well tested in Rust atm anyway.

From my side that sounds like it's good to merge?

Also side note, we'll probably switch from linking against Enzyme to just dlopen'ing Enzyme, which should make this CI even simpler in the future: rust-lang/rust#146623

wsmoses · 2025-10-01T20:40:37Z

while @ZuseZ4 fixes the last test to pass, @sgasho can you get the ccache stuff working?

I think those are the last two things in order to merge!

…youxu bless autodiff batching test This pr blesses a broken test and unblocks running rust in the Enzyme CI: EnzymeAD/Enzyme#2430 Enzyme is the plugin used by our std::autodiff and (future) std::batching modules, both of which are not build by default. In the near future we also hope to enable std::autodiff in the Rust CI. This test is the only one to combine two features, automatic differentiation and batching/vectorization. This combination is even more experimental than either feature on its own. I have a wip branch in which I enable more vectorization/batching and as part of that I'll think more about how to write those tests in a robust way (and likely change the interface). Until that lands, I don't care too much about what specific IR we generate here; it's just nice to track changes. r? compiler

wsmoses · 2025-10-04T17:09:31Z

.github/workflows/enzyme-rust.yml

+      uses: actions/cache@v4
+      with:
+        path: ~/.cache/ccache
+        key: ccache-${{ matrix.os }}-${{ matrix.commit }}


maybe also include rust here?

Rollup merge of #147315 - ZuseZ4:fix-ad-batching-test, r=jieyouxu bless autodiff batching test This pr blesses a broken test and unblocks running rust in the Enzyme CI: EnzymeAD/Enzyme#2430 Enzyme is the plugin used by our std::autodiff and (future) std::batching modules, both of which are not build by default. In the near future we also hope to enable std::autodiff in the Rust CI. This test is the only one to combine two features, automatic differentiation and batching/vectorization. This combination is even more experimental than either feature on its own. I have a wip branch in which I enable more vectorization/batching and as part of that I'll think more about how to write those tests in a robust way (and likely change the interface). Until that lands, I don't care too much about what specific IR we generate here; it's just nice to track changes. r? compiler

ZuseZ4 · 2025-10-04T22:27:30Z

I blessed the last Rust test, so now rust CI should pass if rerun.

wsmoses · 2025-10-04T22:29:05Z

Or rather if the commit is updated, presumably.

The test shouldn't pull main but a fixed commit

ZuseZ4 · 2025-10-05T07:36:21Z

That's unlucky, another update just changed a function hash in a test case. I added another fix on the Rust side to make the test more robust, it should land in a few hrs: rust-lang/rust#147364 (comment)

…eyouxu update autodiff testcases unblock EnzymeAD/Enzyme#2430 (again). Just as I landed a fix for the last test, this one broke. The test should now be fine if the name mangling hash changes again. Also removed an outdated fixme that's not needed since moving autodiff to an intrinsic. The test currently just checks that it compiles, I'll add more precise checks once we actually run this in CI. r? compiler

Rollup merge of #147364 - ZuseZ4:update-autodiff-tests, r=jieyouxu update autodiff testcases unblock EnzymeAD/Enzyme#2430 (again). Just as I landed a fix for the last test, this one broke. The test should now be fine if the name mangling hash changes again. Also removed an outdated fixme that's not needed since moving autodiff to an intrinsic. The test currently just checks that it compiles, I'll add more precise checks once we actually run this in CI. r? compiler

ZuseZ4 · 2025-10-05T22:16:50Z

@sgasho the fix landed, so if you update the rust commit it should pass now :)

wsmoses reviewed Aug 31, 2025

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sgasho force-pushed the rust-autodiff-ci branch from 959f1ee to f6c53f9 Compare September 3, 2025 14:33

wsmoses reviewed Sep 3, 2025

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sgasho force-pushed the rust-autodiff-ci branch from ec70a9d to 2071224 Compare September 4, 2025 15:58

sgasho commented Sep 7, 2025

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wsmoses reviewed Sep 8, 2025

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sgasho force-pushed the rust-autodiff-ci branch from eadd4f3 to 9e3b7aa Compare September 11, 2025 14:42

ZuseZ4 requested a review from wsmoses September 20, 2025 22:25

wsmoses reviewed Sep 20, 2025

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sgasho force-pushed the rust-autodiff-ci branch from 726c421 to 79282f3 Compare September 27, 2025 02:28

ZuseZ4 mentioned this pull request Oct 3, 2025

bless autodiff batching test rust-lang/rust#147315

Merged

ci: add ci to test rust std::autodiff

708beb1

sgasho force-pushed the rust-autodiff-ci branch from 6c69259 to 708beb1 Compare October 4, 2025 14:10

sgasho requested a review from wsmoses October 4, 2025 14:12

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sgasho added 2 commits October 5, 2025 12:23

include rust in the key for the cache

29abf8c

update rust commit

871ef84

sgasho requested a review from wsmoses October 5, 2025 03:34

ZuseZ4 mentioned this pull request Oct 5, 2025

update autodiff testcases rust-lang/rust#147364

Merged

update rust commit

99862d2

		echo "CC=ccache gcc" >> $GITHUB_ENV
		echo "CXX=ccache g++" >> $GITHUB_ENV

ci: add a github action ci to test Rust std::autodiff #2430

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ci: add a github action ci to test Rust std::autodiff #2430

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