{ stdenv, fetchgit }:

stdenv.mkDerivation rec {
  pname = "lmdb";
  version = "0.9.25";

  src = fetchgit {
    url = "https://git.openldap.org/openldap/openldap.git";
    rev = "LMDB_${version}";
    sha256 = "0i60zlca8r6fib23gdgl4c80gxpx24772ggpvz94yr7zaai4k11w";
  };

  postUnpack = "sourceRoot=\${sourceRoot}/libraries/liblmdb";

  patches = [ ./hardcoded-compiler.patch ];
  patchFlags = [ "-p3" ];

  outputs = [ "bin" "out" "dev" ];

  makeFlags = [
    "prefix=$(out)"
    "CC=${stdenv.cc.targetPrefix}cc"
    "AR=${stdenv.cc.targetPrefix}ar"
  ]
    ++ stdenv.lib.optional stdenv.isDarwin "LDFLAGS=-Wl,-install_name,$(out)/lib/liblmdb.so";

  doCheck = true;
  checkPhase = "make test";

  postInstall = ''
    moveToOutput bin "$bin"
  ''
    # add lmdb.pc (dynamic only)
    + ''
    mkdir -p "$dev/lib/pkgconfig"
    cat > "$dev/lib/pkgconfig/lmdb.pc" <<EOF
    Name: lmdb
    Description: ${meta.description}
    Version: ${version}

    Cflags: -I$dev/include
    Libs: -L$out/lib -llmdb
    EOF
  '';

  meta = with stdenv.lib; {
    description = "Lightning memory-mapped database";
    longDescription = ''
      LMDB is an ultra-fast, ultra-compact key-value embedded data store
      developed by Symas for the OpenLDAP Project. It uses memory-mapped files,
      so it has the read performance of a pure in-memory database while still
      offering the persistence of standard disk-based databases, and is only
      limited to the size of the virtual address space.
    '';
    homepage = "http://symas.com/mdb/";
    maintainers = with maintainers; [ jb55 vcunat ];
    license = licenses.openldap;
    platforms = platforms.all;
  };
}