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If the `host_env` feature is enabled, then enable the `_ctypes` module on the Android platform. by psyche314 · Pull Request #7402 · RustPython/RustPython

🧩 Analysis chain

🏁 Script executed:

#!/bin/bash
# Check if _ctypes module or its submodules have any platform guards that would protect against musl/sgx
echo "=== Checking _ctypes module for platform guards ==="
rg -n "cfg.*musl|cfg.*sgx" crates/vm/src/stdlib/_ctypes/

echo ""
echo "=== Checking top-level imports in _ctypes files ==="
rg -n "^use (libffi|libloading)" crates/vm/src/stdlib/_ctypes/

Repository: RustPython/RustPython

Length of output: 454


🏁 Script executed:

#!/bin/bash
# Read the mod.rs file to check the cfg conditions
echo "=== Reading crates/vm/src/stdlib/mod.rs around lines 41-49 ==="
sed -n '35,55p' crates/vm/src/stdlib/mod.rs

echo ""
echo "=== Checking for second cfg block around lines 91-98 ==="
sed -n '85,105p' crates/vm/src/stdlib/mod.rs

echo ""
echo "=== Full view of cfg conditions for _ctypes ==="
rg -B2 -A8 'mod _ctypes' crates/vm/src/stdlib/mod.rs

Repository: RustPython/RustPython

Length of output: 1668


🏁 Script executed:

#!/bin/bash
# Check if _ctypes.rs has any top-level cfg guards
echo "=== Checking _ctypes.rs for top-level cfg ==="
head -20 crates/vm/src/stdlib/_ctypes.rs

echo ""
echo "=== Check if libffi and libloading are available on musl/sgx ==="
# Check if there are any feature flags or conditional compilation for these deps
rg -n "libffi|libloading" Cargo.toml | head -20

Repository: RustPython/RustPython

Length of output: 609


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#!/bin/bash
# Check for documentation about ctypes feature
echo "=== Searching for ctypes in README or docs ==="
find . -name "README*" -o -name "Cargo.toml" -o -name "FEATURES*" | head -10 | xargs grep -l "ctypes" 2>/dev/null || echo "No direct ctypes documentation found"

echo ""
echo "=== Check Cargo.toml for ctypes feature definition ==="
rg -A5 '\[features\]' Cargo.toml | grep -A100 "ctypes"

Repository: RustPython/RustPython

Length of output: 294


🏁 Script executed:

#!/bin/bash
# Check if there are any comments in mod.rs explaining this design
echo "=== Searching for comments around the ctypes cfg condition ==="
sed -n '35,55p' crates/vm/src/stdlib/mod.rs | cat -n

echo ""
echo "=== Check if libloading/libffi have musl support ==="
rg -B3 -A3 "libffi|libloading" Cargo.toml

Repository: RustPython/RustPython

Length of output: 1108


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#!/bin/bash
# Check if there are any issues or PRs mentioning musl/sgx and ctypes
echo "=== Searching for any musl-related comments in stdlib ==="
rg -n "musl" crates/vm/src/stdlib/ | head -20

echo ""
echo "=== Check if libffi/libloading have documented musl issues ==="
# Check the Cargo.lock or dependency versions for any indicators
rg -B5 -A5 "libffi.*5\|libloading" Cargo.lock 2>/dev/null | head -30 || echo "Cargo.lock check skipped"

Repository: RustPython/RustPython

Length of output: 1938


🏁 Script executed:

#!/bin/bash
# Check if there's any issue or discussion about ctypes and musl in git history or issues
echo "=== Check if there's context in _ctypes.rs about musl/sgx ==="
grep -n "musl\|sgx\|platform" crates/vm/src/stdlib/_ctypes.rs || echo "No platform mentions in _ctypes.rs"

echo ""
echo "=== Verify the exact behavior: what happens when ctypes feature is enabled on musl ==="
# Check if there's a CI configuration that tests this
find . -name "*.yml" -o -name "*.yaml" | xargs grep -l "ctypes\|musl" 2>/dev/null | head -5

Repository: RustPython/RustPython

Length of output: 396


🏁 Script executed:

#!/bin/bash
# Check CI configuration for ctypes testing
echo "=== Checking CI for ctypes feature tests ==="
grep -n "ctypes" .github/workflows/ci.yaml

echo ""
echo "=== Checking if musl builds are tested ==="
grep -n "musl" .github/workflows/ci.yaml | head -20

echo ""
echo "=== Check if ctypes and musl are tested together ==="
grep -B5 -A5 "ctypes" .github/workflows/ci.yaml | grep -A10 -B10 "musl"

Repository: RustPython/RustPython

Length of output: 282


🏁 Script executed:

#!/bin/bash
# Check if there's any documentation or indication of libffi/libloading support on musl
echo "=== Check Cargo.toml dependencies for any musl-related features ==="
grep -B2 -A2 "libffi\|libloading" Cargo.toml

echo ""
echo "=== Look for any conditional dependencies based on target_env ==="
sed -n '/^\[target\./,/^\[/p' Cargo.toml | grep -A5 "musl"

echo ""
echo "=== Check if the ctypes feature is explicitly documented anywhere ==="
find . -name "*.md" -type f | xargs grep -i "ctypes" 2>/dev/null | head -10

Repository: RustPython/RustPython

Length of output: 716


Document the platform constraints for the ctypes feature.

The feature = "ctypes" flag bypasses platform checks and allows enabling ctypes on musl and SGX targets. Since _ctypes and its submodules unconditionally depend on libffi and libloading (which are not available on these platforms), users who enable --features ctypes on musl or SGX will encounter compile-time errors. This appears intentional—to allow users to opt-in despite platform restrictions—but should be documented in Cargo.toml or the project README so users understand the platform requirements before attempting to enable this feature.