Does not build on Windows

[mpilgrem]

Building on Windows 11 (with stack version 2.7.5 and lts-19.4 (GHC 9.0.2)) fails with:

brotli> configure (lib)
Configuring brotli-0.0.0.0...
brotli> build (lib)
Preprocessing library for brotli-0.0.0.0..
Building library for brotli-0.0.0.0..
brotli> copy/register
Installing library in C:\Users\mikep\Documents\Code\GitHub\brotli\.stack-work\install\9e456e06\lib\x86_64-windows-ghc-9.0.2\brotli-0.0.0.0-HH3BgkM1KFnCoH8s0HSlFJ
Registering library for brotli-0.0.0.0..
Cabal-simple_Z6RU0evB_3.4.1.0_ghc-9.0.2.exe:
'C:\Users\mikep\AppData\Local\Programs\stack\x86_64-windows\ghc-9.0.2\bin\ghc-pkg-9.0.2.exe'
exited with an error:
brotli-0.0.0.0: Warning: haddock-interfaces:
C:\Users\mikep\Documents\Code\GitHub\brotli\.stack-work\install\9e456e06\doc\brotli-0.0.0.0\brotli.haddock
doesn't exist or isn't a file
brotli-0.0.0.0: library-dirs: /mingw64/lib is a relative path which makes no
sense (as there is nothing for it to be relative to). You can make paths
relative to the package database itself by using ${pkgroot}. (use --force to
override)
brotli-0.0.0.0: dynamic-library-dirs: /mingw64/lib is a relative path which
makes no sense (as there is nothing for it to be relative to). You can make
paths relative to the package database itself by using ${pkgroot}. (use
--force to override)


--  While building package brotli-0.0.0.0 (scroll up to its section to see the error) using:
      C:\sr\setup-exe-cache\x86_64-windows\Cabal-simple_Z6RU0evB_3.4.1.0_ghc-9.0.2.exe --builddir=.stack-work\dist\d53b6a14 register
    Process exited with code: ExitFailure 1

This appears to be due to part of brotli.cabal, namely pkgconfig-depends: libbrotlienc, libbrotlidec. If I replace that in a local fork of the package with extra-libraries: libbrotlienc, libbrotlidec, it builds as expected. I will submit a pull request, accordingly.

[mpilgrem]

This may, somehow, have been due to there being another MSYS2 set up on my machine. Having now deleted it, and relying only on the stack-supplied MSYS2, I can't repeat the problem. Key steps (extracts only of outputs):

> stack unpack brotli
> cd brotli-0.0.0.0
> stack init
> stack exec -- pacman -S mingw-w64-x86_64-pkg-config
> stack exec -- pkg-config --variable=pc_path pkg-config
C:\Users\mikep\AppData\Local\Programs\stack\x86_64-windows\msys2-20210604\mingw64\lib\pkgconfig;C:\Users\mikep\AppData\Local\Programs\stack\x86_64-windows\msys2-20210604\mingw64\share\pkgconfig
> stack exec -- pacman -S mingw-w64-x86_64-brotli
> stack build
...
Installing library in C:\Users\mikep\Documents\Code\Haskell\brotli-0.0.0.0\.stack-work\install\4a3b70df\lib\x86_64-windows-ghc-9.0.2\brotli-0.0.0.0-HH3BgkM1KFnCoH8s0HSlFJ
Registering library for brotli-0.0.0.0..