@hackage / hs-pkg-config

Create pkg-config configuration files

Latest0.2.1.0

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  • Last updated , by PeterTrsko
  • License BSD-3-Clause
  • Categories Development

  • Maintained by: peter.trsko@gmail.com

  • Lottery factor: 0

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Installation

Package Flags

Use the -f option with cabal commands to enable flags

    pedantic (off by default)

    Pass additional warning flags including -Werror to GHC during compilation.

Readme

Hs-pkg-config

Hackage BSD3 License

Description

Library for creating pkg-config configuration files from Haskell.

One of the possible usage examples of this library is generating .pc files from Shake build system.

Example

Following Haskell code is able to generate package configuration file named foo.pc for library foo:

{-# LANGUAGE OverloadedStrings #-}
module Main (main)
  where

import Data.String (IsString)

import Data.Default.Class (Default(def))
   -- From data-default-class library:
   -- http://hackage.haskell.org/package/data-default-class

import Control.Lens
   -- From lens library:
   -- http://hackage.haskell.org/package/lens

import Data.PkgConfig


libraryBaseName :: IsString a => a
libraryBaseName = "foo"

main :: IO ()
main = writePkgConfig (libraryBaseName ++ ".pc") libPkgConfig
  where
    libPkgConfig = def
        & pkgVariables   .~
            [ ("prefix",     "/usr/local"              )
            , ("includedir", var "prefix" </> "include")
            , ("libdir",     var "prefix" </> "lib"    )
            , ("arch",       "i386"                    )
            ]
        & pkgName        .~ libraryBaseName
        & pkgDescription .~ "Example pkg-config."
        & pkgVersion     .~ version [1, 2, 3]
        & pkgCflags      .~ includes [var "includedir"]
        & pkgRequires    .~ list
            [ "bar" ~> [0], "bar" ~<= [3, 1]
            , "baz" ~= [1, 2, 3]
            ]
        & pkgLibs        .~ options
            [ libraryPath [var "libdir", var "libdir" </> var "arch"]
            , libraries [libraryBaseName]
            ]

Content of foo.pc:

prefix=/usr/local
includedir=${prefix}/include
libdir=${prefix}/lib
arch=i386

Name: foo
Description: Example pkg-config.
Version: 1.2.3
Requires: bar > 0, bar <= 3.1, baz = 1.2.3
Cflags: -I"${includedir}"
Libs: -L"${libdir}" -L"${libdir}/${arch}" -lfoo

Now lets see if pkg-config would be able to tell us something about this library:

$ PKG_CONFIG_PATH=`pwd` pkg-config --modversion foo
1.2.3

Note that asking for --cflags or other options would result in error saying that it is unable to find bar and baz libraries. That is OK, it means that it is able to parse file correctly, we just hadn't provided bar.pc and baz.pc. If we delete lines that define Requires: field, then pkg-config would be able to give us --cflags, --libs, etc. You can try it.

Building options

  • -fpedantic (disabled by default)

    Pass additional warning flags including -Werror to GHC during compilation.