Toolchain differences reported by "configure" on macOS
Summary
Please read the guidance in [https://gitlab.haskell.org/ghc/ghc/-/wikis/report-a-bug] and write a brief description of the issue.
Steps to reproduce
$ git clone ghc
$ git clone https://github.com/alpmestan/ghc.nix
$ nix develop ghc.nix
ghc.nix ~ cd ghc
ghc.nix ~ ./boot && ./configure
Configures successfully, but this warning appears:
configure: WARNING:
There are some differences between the toolchain configured by "configure" (hadrian/cfg/default.target) and the toolchain configured by the "ghc-toolchain" program (hadrian/cfg/default.target.ghc-toolchain).
22c22
< { ccLinkProgram = Program { prgPath = "/nix/store/p72lcp92djj8xpdjm27rjrrxznjjgvyi-clang-wrapper-11.1.0/bin/cc" , prgFlags = ["--target=arm64-apple-darwin"] }
---
> { ccLinkProgram = Program { prgPath = "/nix/store/p72lcp92djj8xpdjm27rjrrxznjjgvyi-clang-wrapper-11.1.0/bin/cc" , prgFlags = ["--target=arm64-apple-darwin","-L/opt/homebrew/opt/llvm@13/lib"] }
Don't worry! This won't affect your ghc in any way.
However, in a near future, we will move to configuring toolchains with "ghc-toolchain" by default, so you might have discovered a future bug.
In light of it, if you've spotted this difference, please report a GHC bug at https://www.haskell.org/ghc/reportabug
Expected behavior
What do you expect the reproducer described above to do?
Not emit the warning.
Environment
- GHC version used: 9.11.20240518
Optional:
- Operating System: macOS Sonoma 14.4.1
- System Architecture: aarch64