KDE_FIND_PATH(pkg-config, PKGCONFIG, [${prefix}/bin ${exec_prefix}/bin /usr/bin /usr/local/bin /opt/local/bin], [
  AC_MSG_WARN([Could not find pkg-config])
])

AC_ARG_ENABLE(scripting,
    AC_HELP_STRING([--enable-scripting],
                   [build scripting library (Kross) [default=yes]]),
    compile_kross=$enableval, compile_kross=yes)
AM_CONDITIONAL(compile_kross, test "x$compile_kross" = "xyes")

###############################
# Check if Python is installed.

if test "x$compile_kross" = "xyes" ; then
    #KDE_CHECK_PYTHON(2.3)
    KDE_CHECK_PYTHON
fi

# Compile the Kross python plugin only if both, $LIBPYTHON and
# $PYTHONINC, are defined.
AM_CONDITIONAL(compile_kross_python,
               test -n "$LIBPYTHON" && test -n "$PYTHONINC")

###############################
# Check for Ruby

if test "x$compile_kross" = "xyes" ; then
  AC_CHECK_PROGS([RUBY], [ruby ruby1.8 ruby18 ruby1.9 ruby19], ruby)

  if test -n "$RUBY"; then
    AC_MSG_CHECKING(for Ruby dirs)
    # Note: pkgconfig file exists only for ruby >= 1.9.3
    if test -n "$PKGCONFIG"; then
      RUBY_VERSION=`$PKGCONFIG ruby --modversion 2>/dev/null`
      if test -n "$RUBY_VERSION"; then
        RUBY_CFLAGS=`$PKGCONFIG ruby --cflags`
      fi
      if test -z "$RUBY_VERSION"; then
        RUBY_VERSION=`$PKGCONFIG ruby-1.9 --modversion 2>/dev/null`
        if test -n "$RUBY_VERSION"; then
          RUBY_CFLAGS=`$PKGCONFIG ruby-1.9 --cflags`
        fi
      fi
      if test -z "$RUBY_VERSION"; then
        # pkgconfig file does not exist but might be 1.9.1: RUBY_VERSION defined in ruby/version.h
        if test -n "$RUBY -r rbconfig -e 'printf("%s",RbConfig::CONFIG@<:@"rubyhdrdir"@:>@)'"; then
          # rubyhdrdir parameter works only in >=1.9.1; this is 1.9.1
          RUBY_MAJOR=`$RUBY -r rbconfig -e 'printf("%s",RbConfig::CONFIG@<:@"['MAJOR']"@:>@)'`
          RUBY_MINOR=`$RUBY -r rbconfig -e 'printf("%s",RbConfig::CONFIG@<:@"['MINOR']"@:>@)'`
          RUBY_TEENY=`$RUBY -r rbconfig -e 'printf("%s",RbConfig::CONFIG@<:@"['TEENY']"@:>@)'`
          if test "$RUBY_MAJOR" == "1" && test "$RUBY_MINOR" == "9"; then
            RUBY_VERSION="$RUBY_MAJOR.$RUBY_MINOR.$RUBY_TEENY"
            RUBY_CFLAGS="-I`$RUBY -r rbconfig -e 'printf("%s",RbConfig::CONFIG@<:@"rubyhdrdir"@:>@)'`"
            RUBY_CFLAGS="$RUBY_CFLAGS/`$RUBY -r rbconfig -e 'printf("%s",RbConfig::CONFIG@<:@"arch"@:>@)'` $RUBY_CFLAGS"
            if test -n "`$RUBY -r rbconfig -e 'printf("%s",RbConfig::CONFIG@<:@"LIBRUBYARG_SHARED"@:>@)'`"; then
              RUBY_ENABLESHARED=yes
            fi
          fi
        fi
      fi
      if test -n "$RUBY_VERSION"; then
        RUBY_ARCHDIR=`$RUBY -r rbconfig -e 'printf("%s",RbConfig::CONFIG@<:@"archdir"@:>@)'`
        RUBY_SITEARCHDIR=`$RUBY -r rbconfig -e 'printf("%s",RbConfig::CONFIG@<:@"sitearchdir"@:>@)'`
        RUBY_SITEDIR=`$RUBY -r rbconfig -e 'printf("%s",RbConfig::CONFIG@<:@"sitelibdir"@:>@)'`
        RUBY_RUBYLIBDIR=`$RUBY -r rbconfig -e 'printf("%s",RbConfig::CONFIG@<:@"rubylibdir"@:>@)'`
        RUBY_LIBDIR=`$RUBY -r rbconfig -e 'printf("%s",RbConfig::CONFIG@<:@"libdir"@:>@)'`
        RUBY_INCLUDEDIR=`$RUBY -r rbconfig -e 'printf("%s",RbConfig::CONFIG@<:@"rubyhdrdir"@:>@)'`
        RUBY_LIBRUBYARG=`$RUBY -r rbconfig -e 'printf("%s",RbConfig::CONFIG@<:@"LIBRUBYARG_SHARED"@:>@)'`
        AC_DEFINE_UNQUOTED(HAVE_RUBY_1_9, 1, [Defines if your system has Ruby 1.9.x])
      fi
    fi
    if test -z "$RUBY_VERSION"; then
      RUBY_ARCHDIR=`$RUBY -r rbconfig -e 'printf("%s",Config::CONFIG@<:@"archdir"@:>@)'`
      RUBY_SITEARCHDIR=`$RUBY -r rbconfig -e 'printf("%s",Config::CONFIG@<:@"sitearchdir"@:>@)'`
      RUBY_SITEDIR=`$RUBY -r rbconfig -e 'printf("%s",Config::CONFIG@<:@"sitelibdir"@:>@)'`
      RUBY_RUBYLIBDIR=`$RUBY -r rbconfig -e 'printf("%s",Config::CONFIG@<:@"rubylibdir"@:>@)'`
      RUBY_LIBDIR=`$RUBY -r rbconfig -e 'printf("%s",Config::CONFIG@<:@"libdir"@:>@)'`
      RUBY_INCLUDEDIR=$RUBY_ARCHDIR
      RUBY_LIBRUBYARG=`$RUBY -r rbconfig -e 'printf("%s",Config::CONFIG@<:@"LIBRUBYARG_SHARED"@:>@)'`
    fi
    AC_MSG_RESULT([
                    archdir $RUBY_ARCHDIR,
                    sitearchdir $RUBY_SITEARCHDIR,
                    sitedir $RUBY_SITEDIR,
                    rubylibdir $RUBY_RUBYLIBDIR,
                    libdir $RUBY_LIBDIR,
                    includedir $RUBY_INCLUDEDIR,
                    librubyarg $RUBY_LIBRUBYARG,
                    cflags $RUBY_CFLAGS])
    AC_SUBST(RUBY_ARCHDIR)
    AC_SUBST(RUBY_SITEARCHDIR)
    AC_SUBST(RUBY_RUBYLIBDIR)
    AC_SUBST(RUBY_INCLUDEDIR)
    AC_SUBST(RUBY_LIBRUBYARG)
    AC_SUBST(RUBY_SITEDIR)
    AC_SUBST(RUBY_CFLAGS)

    AC_MSG_CHECKING(for Ruby header)

    if test ! -r $RUBY_INCLUDEDIR/ruby.h; then
      # if $RUBY_INCLUDEDIR is not valid try to use $RUBY_ARCHDIR
      RUBY_INCLUDEDIR=$RUBY_ARCHDIR
    fi

      AC_MSG_RESULT([found]) # header

      AC_MSG_CHECKING(Ruby shared library)
      if test "x$RUBY_ENABLESHARED" != "xyes" ; then
        AC_MSG_RESULT([shared library not found])
        RUBY_LIBDIR="" 
      else
        if test -z "$RUBY_LIBRUBYARG" ; then
          AC_MSG_RESULT([link argument not found])
          RUBY_LIBDIR="" 
        else
          AC_MSG_RESULT([found]) # shared library link arg

          AC_MSG_CHECKING([if C++ program with ruby can be compiled])
          AC_LANG_SAVE
          AC_LANG_CPLUSPLUS
          ac_save_CXXFLAGS="$CXXFLAGS"
          CXXFLAGS="$CXXFLAGS -I$RUBY_INCLUDEDIR $RUBY_CFLAGS"
          AC_CACHE_VAL(ruby_build,
          [
            AC_TRY_COMPILE([
                #include <ruby.h>
            ],[
                ruby_init();
                return 0;
            ], ruby_build=yes,
            ruby_build=no)
          ])
          AC_MSG_RESULT($ruby_build)
          if test "$ruby_build" = "no"; then
            RUBY_LIBDIR=""
          fi
          CXXFLAGS="$ac_save_CXXFLAGS"
          AC_LANG_RESTORE
        fi # have ruby shared lib argument
      fi # have shared lib
  fi # have ruby
fi # compiling kross

AM_CONDITIONAL(compile_kross_ruby, test -n "$RUBY_LIBDIR")