(tvm-ffi) branch main updated: [CI] Pass the venv Python to the Rust stubgen example build (#868)

[tqchen]

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in repository https://gitbox.apache.org/repos/asf/tvm-ffi.git


The following commit(s) were added to refs/heads/main by this push:
     new b310f9c8  [CI] Pass the venv Python to the Rust stubgen example build 
(#868)
b310f9c8 is described below

commit b310f9c88eb89551acc27cbf62bf91ac573e81fa
Author: Linzhang Li <yuchuan.7stre...@gmail.com>
AuthorDate: Thu Oct 22 13:56:38 2026 -0400

     [CI] Pass the venv Python to the Rust stubgen example build (#868)
    
    ## Summary
    
    Fix the `Run rust stubgen example` step on `ubuntu-latest`. On the new
    ubuntu-26.04 runner image it fails to configure
    
    ## Cause
    
    `ubuntu-latest` moved from ubuntu-24.04 to ubuntu-26.04. The new image
    ships
    CMake 4.4.4 (previously 3.31.6) and a system Python 3.14.
    
    From CMake 4.4, FindPython defaults `Python_FIND_ABI` to
    `ANY;ANY;ANY;OFF` on
    POSIX, so it rejects the job's free-threaded (3.14t) venv interpreter as
    "Wrong ABI" and falls back to `/usr/bin/python3.14`, which has no
    tvm_ffi.
    CMake 3.31 checked the ABI only when `Python_FIND_ABI` was set, so the
    venv
    interpreter was found.
    
    The step had not run on the new image before: until #865, every
    `ubuntu-latest` job stopped earlier at the GCC 15.2 ICE in `Run cpp
    tests`.
---
 .github/workflows/ci_test.yml | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/ci_test.yml b/.github/workflows/ci_test.yml
index a4d9bf36..4dcb3902 100644
--- a/.github/workflows/ci_test.yml
+++ b/.github/workflows/ci_test.yml
@@ -211,13 +211,16 @@ jobs:
 
       # Build the Rust stubgen example against the installed package. Its 
post-build
       # step refreshes the bindings in place, so a diff means the checked-in 
file was stale.
+      # Pass the venv interpreter explicitly: from CMake 4.4, FindPython skips 
free-threaded
+      # interpreters (3.14t) by default and would pick a system Python without 
tvm_ffi.
       - name: Run rust stubgen example
         if: ${{ matrix.os == 'ubuntu-latest' }}
         working-directory: examples/rust_stubgen
         env:
           CMAKE_BUILD_PARALLEL_LEVEL: ${{ steps.env_vars.outputs.cpu_count }}
         run: |
-          cmake -B build -DCMAKE_BUILD_TYPE=Release
+          cmake -B build -DCMAKE_BUILD_TYPE=Release \
+            -DPython_EXECUTABLE="$(which python)" 
-DPython3_EXECUTABLE="$(which python)"
           cmake --build build
           git diff --exit-code -- rust/src/generated
           cd rust && cargo run