nix: Fix cross-build on same platform #6691
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📝 WalkthroughWalkthroughThe pull request introduces cross-compilation support in the Changes
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Actionable comments posted: 0
🧹 Outside diff range and nitpick comments (2)
nix/rust-builder.nix (1)
68-73: LGTM! Consider documenting the cross-compilation workflow.The propagation of
isCrossthroughcallPackageis well-integrated with the existing build system. The parameter inheritance alongsidefoundryBin,solcDefault, andcraneLibensures consistent cross-compilation behavior.Consider adding documentation in the repository's Nix documentation to:
- Explain when to use
isCrossvs letting the system detect cross-compilation- Provide examples of common cross-compilation scenarios
- Document the interaction between
isCross,crossSystem, and platform comparisonnix/rust-package.nix (1)
Line range hint
165-171: Consider adding error handling for patchelf operations.While the interpreter patching logic is correct, it could benefit from error handling to ensure the patching operation succeeds.
Consider applying this improvement:
preFixup = lib.optionalString (isCross && targetInterpreter != "") '' for f in `find $out/bin/ -type f`; do echo "patching interpreter for $f to ${targetInterpreter}" - patchelf --set-interpreter ${targetInterpreter} --output $f.patched $f - mv $f.patched $f + if ! patchelf --set-interpreter ${targetInterpreter} --output $f.patched $f; then + echo "Failed to patch interpreter for $f" + exit 1 + fi + if ! mv $f.patched $f; then + echo "Failed to replace original binary $f" + exit 1 + fi done '';
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📒 Files selected for processing (3)
flake.nix(1 hunks)nix/rust-builder.nix(2 hunks)nix/rust-package.nix(1 hunks)
🔇 Additional comments (8)
nix/rust-builder.nix (1)
4-4: LGTM! Verify platform comparison behavior.
The addition of isCross parameter with a default value of false is a good approach for explicit cross-compilation control.
Let's verify the platform comparison behavior in the codebase:
✅ Verification successful
The shell script results provide comprehensive information about how isCross is used across the codebase. Let me generate the final response based on this verification:
Platform comparison logic is correctly implemented
The isCross parameter works correctly with the platform comparison logic:
- In
rust-builder.nix,crossSystemis properly normalized usingpkgsLocal.lib.systems.equalsto compare withlocalSystem - The parameter is consistently propagated to
rust-package.nixwhere it's used inpreFixupfor interpreter patching - All cross-compilation cases in
flake.nixexplicitly setisCross = truewith their respectivecrossSystemvalues
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Description: Check how platform comparison is handled across the codebase
# Look for platform comparison logic that might interact with isCross
# Search for platform comparison patterns
rg -A 5 "buildPlatform|hostPlatform|crossSystem" --type nix
# Search for other isCross usage
rg "isCross" --type nix
Length of output: 6488
nix/rust-package.nix (2)
11-11: LGTM: Explicit cross-build identification parameter added.
The addition of isCross parameter with a default value of false aligns well with the PR objective of making cross-build identification explicit in the configuration.
Line range hint 32-36: Verify support for all required target architectures.
The target interpreter paths are defined for x86_64, aarch64, and armv7 Linux platforms. Let's verify if these cover all required target platforms for cross-compilation.
✅ Verification successful
Target interpreter paths are correctly defined for all supported architectures
Based on the codebase analysis:
- The
flake.nixdefines builds for x86_64-linux, aarch64-linux, armv7l-linux, x86_64-darwin, and aarch64-darwin - The target interpreter paths in
rust-package.nixcorrectly cover all Linux architectures:- x86_64:
/lib64/ld-linux-x86-64.so.2 - aarch64:
/lib64/ld-linux-aarch64.so.1 - armv7:
/lib64/ld-linux-armhf.so.3
- x86_64:
- Darwin platforms don't need interpreter paths as they use a different linking mechanism
- The
rust-builder.nixhandles the correct cargo target triple mapping for armv7
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Description: Check for any other architectures referenced in the codebase that might need interpreter support
# Search for architecture-specific references in Nix files
rg -t nix "(x86_64|aarch64|armv7|arm64|i686)"
# Search for build target definitions
fd -e nix -x grep -l "buildPlatform\|hostPlatform"
Length of output: 2905
Script:
#!/bin/bash
# Let's check the actual target platforms defined in the build configuration
# Check rust-builder.nix for platform configurations
cat nix/rust-builder.nix
# Check for any other platform-specific handling in rust-package.nix
cat nix/rust-package.nix
Length of output: 8260
flake.nix (5)
99-99: Ensure 'isCross = true' is correctly applied for cross-compilation
The addition of isCross = true in the rust-builder-x86_64-linux configuration explicitly indicates cross-compilation, which aligns with the PR objectives to fix cross-building issues when the build and target platforms are the same.
105-105: Ensure 'isCross = true' is correctly applied for cross-compilation
Similarly, adding isCross = true to the rust-builder-x86_64-darwin configuration ensures that cross-compilation is explicitly identified, which should help resolve the cross-building issue on this platform.
111-111: Ensure 'isCross = true' is correctly applied for cross-compilation
Including isCross = true in the rust-builder-aarch64-linux configuration appropriately addresses the cross-compilation identification for this target platform.
117-117: Ensure 'isCross = true' is correctly applied for cross-compilation
The addition of isCross = true to the rust-builder-aarch64-darwin configuration correctly signifies cross-compilation, aiding in the proper handling of builds for this platform.
123-123: Ensure 'isCross = true' is correctly applied for cross-compilation
Adding isCross = true in the rust-builder-armv7l-linux configuration is appropriate and aligns with the goal of explicit cross-compilation identification.
| @@ -8,6 +8,7 @@ | |||
| , foundryBin | |||
| , git | |||
| , html-tidy | |||
| , isCross ? false | |||
The problem was the cross build identification when the build platform was the same as the target platform. This has been made explicit in the configuration of the builder now.
Fixes #6689