## Summary Using cabal to test my [avif](https://github.com/vmchale/avif) library yields an error during linking when using GHC 9.12.3 but not when using GHC 9.12.2 ## Steps to reproduce ``` % cabal test -w ghc-9.12.2 ... Preprocessing test suite 'avif-test' for avif-2.0.0.0... Building test suite 'avif-test' for avif-2.0.0.0... Running 1 test suites... Test suite avif-test: RUNNING... Roundtrip test/data/original.avif: OK (0.01s) test/data/original.avif: OK (8.21s) decodeE: OK All 3 tests passed (8.21s) Test suite avif-test: PASS .... % cabal test -w ghc-9.12.3 ... Configuring library for avif-2.0.0.0... Preprocessing library for avif-2.0.0.0... Building library for avif-2.0.0.0... ... Configuring test suite 'avif-test' for avif-2.0.0.0... Preprocessing test suite 'avif-test' for avif-2.0.0.0... Building test suite 'avif-test' for avif-2.0.0.0... [1 of 1] Compiling Main ( test/Spec.hs, dist-newstyle/build/aarch64-osx/ghc-9.12.3/avif-2.0.0.0/t/avif-test/build/avif-test/avif-test-tmp/Main.o ) [2 of 2] Linking dist-newstyle/build/aarch64-osx/ghc-9.12.3/avif-2.0.0.0/t/avif-test/build/avif-test/avif-test Undefined symbols for architecture arm64: "_iconv", referenced from: _hs_iconv in libHSghc-internal-9.1203.0-d191.a[5](iconv.o) "_iconv_close", referenced from: _hs_iconv_close in libHSghc-internal-9.1203.0-d191.a[5](iconv.o) "_iconv_open", referenced from: _hs_iconv_open in libHSghc-internal-9.1203.0-d191.a[5](iconv.o) ld: symbol(s) not found for architecture arm64 clang: error: linker command failed with exit code 1 (use -v to see invocation) ghc-9.12.3: Uncaught exception ghc-9.12.3-89b4:GHC.Utils.Panic.GhcException: `gcc' failed in phase `Linker'. (Exit code: 1) While handling `gcc' failed in phase `Linker'. (Exit code: 1) HasCallStack backtrace: bracket, called at compiler/GHC/Driver/Make.hs:2959:3 in ghc-9.12.3-89b4:GHC.Driver.Make ``` Using GHC 9.6.7 yields a similar failure during linking; while GHC 9.8.4 and GHC 9.10.3 proceed successfully. GHC 9.14.1 also yields a failure where e.g. GHC 9.12.2 worked. ## Expected behavior Linking behavior should not vary across versions. ## Environment * GHC version used: 9.12.2, 9.12.3 Optional: * Operating System: macOS 15.7.3 * System Architecture: M4