my.cabal

cabal-version: 3.6
name:          Hsc2HsOptions
version:       0.1
license:       BSD-3-Clause
stability:     stable
category:      PackageTests
build-type:    Simple
description:   Check that preprocessors are run.

executable my-executable
  main-is:        Main.hs
  build-depends:  base
  other-modules:  Foo
  hsc2hs-options: "--cc=g++"