## Summary When using LLVM backend on Windows, a link error "undefined symbol: `_fltused`" occurs if the program contains floating-point related code. ## Steps to reproduce With MSYS2, ``` $ cat test-llvm.hs add :: Double -> Double -> Double add x y = x + y {-# NOINLINE add #-} main = do putStrLn "Hello world!" print (add 1.0 2.0) $ ghc-9.4.3 -fllvm -pgmlo /c/ghcup/ghc/9.4.3/mingw/bin/opt -pgmlc /c/ghcup/ghc/9.4.3/mingw/bin/llc -fforce-recomp test-llvm.hs [1 of 2] Compiling Main ( test-llvm.hs, test-llvm.o ) [2 of 2] Linking test-llvm.exe ld.lld: error: undefined symbol: _fltused >>> referenced by test-llvm.o clang: error: linker command failed with exit code 1 (use -v to see invocation) ghc-9.4.3.exe: `clang.exe' failed in phase `Linker'. (Exit code: 1) ``` ## Expected behavior The program should link fine. ## Environment * GHC version used: 9.4.3 Optional: * Operating System: Windows * System Architecture: x86\_64