cabal-version:       2.2
name:                inline-c-cpp
version:             0.5.0.1
synopsis:            Lets you embed C++ code into Haskell.
description:         Utilities to inline C++ code into Haskell using inline-c.  See
                     tests for example on how to build.
license:             MIT
license-file:        LICENSE
author:              Francesco Mazzoli
maintainer:          f@mazzo.li
copyright:           (c) 2015-2016 FP Complete Corporation, (c) 2017-2019 Francesco Mazzoli
category:            FFI
tested-with:         GHC == 8.4.4, GHC == 8.6.5, GHC == 8.8.4, GHC == 8.10.2
build-type:          Simple
extra-source-files:  test/*.h

source-repository head
  type:     git
  location: https://github.com/fpco/inline-c

flag std-vector-example
  description:         Build std::vector example
  default:             False

common cxx-opts
  -- These options are for compilation of C++ _files_. We need to duplicate
  -- these in ghc-options to apply them on inline-c-cpp snippets.
  -- This is partly(?) due to Cabal < 3.2.1.0 not passing cxx-options to
  -- GHC 8.10 correctly. See https://github.com/haskell/cabal/issues/6421
  cxx-options:
    -- Compilers strive to be ABI compatible regardless of the C++ language
    -- version (except perhaps experimental features).
    -- Discussion: https://stackoverflow.com/questions/46746878/is-it-safe-to-link-c17-c14-and-c11-objects/49118876
    -- We only have to raise this if a new inline-c-cpp feature requires us to
    -- bundle C++ code that requires a newer version of the standard.
    -- Generated code in user libraries will be compiled with the language
    -- version configured there.
    -std=c++11
    -Wall

  -- Linking to the C++ standard library
  if impl(ghc >= 9.4)
    build-depends: system-cxx-std-lib == 1.0
  elif os(linux)
    extra-libraries: stdc++
  elif os(darwin)
    extra-libraries: c++
    -- avoid https://gitlab.haskell.org/ghc/ghc/issues/11829
    ld-options:  -Wl,-keep_dwarf_unwind

  if impl(ghc >= 8.10)
    ghc-options:
      -optcxx-std=c++11
      -optcxx-Wall
  else
    -- On GHC < 8.10, we have to emulate -optcxx by making the C compiler compile
    -- C++. GCC accepts this via -std, whereas Clang requires us to change the
    -- command.
    ghc-options:
      -optc-std=c++11
      -optc-Wall
    if os(darwin)
      ghc-options: -pgmc=clang++

library
  import:              cxx-opts
  exposed-modules:     Language.C.Inline.Cpp
                       Language.C.Inline.Cpp.Exception
                       Language.C.Inline.Cpp.Exceptions
                       Language.C.Inline.Cpp.Unsafe
  build-depends:       base >=4.7 && <5
                     , bytestring
                     , inline-c >= 0.9.0.0
                     , template-haskell
                     , text
                     , safe-exceptions
                     , containers
  hs-source-dirs:      src
  default-language:    Haskell2010
  ghc-options:         -Wall
  include-dirs:        include
  install-includes:    HaskellException.hxx HaskellStablePtr.hxx
  cxx-sources:         cxx-src/HaskellException.cxx
                       cxx-src/HaskellStablePtr.cxx

test-suite tests
  import:              cxx-opts
  type:                exitcode-stdio-1.0
  hs-source-dirs:      test
  main-is:             tests.hs
  other-modules:       StdVector
                     , TemplateSpec
  build-depends:       base >=4 && <5
                     , bytestring
                     , inline-c
                     , inline-c-cpp
                     , safe-exceptions
                     , hspec
                     , containers
                     , template-haskell
                     , vector
  default-language:    Haskell2010
  cxx-options:         -Werror -std=c++11

  if impl(ghc >= 8.10)
    ghc-options:
      -optcxx-Werror
  -- else
  --   ghc-options:
  --     -- GHC < 8.10 can pass options to the C++ compiler, but it warns
  --     -- so -Werror will not work.
  --     -optc-Werror