dnl check for a minimum version of GLib

dnl AG_GST_GLIB_CHECK([minimum-version-required])

AC_DEFUN([AG_GST_GLIB_CHECK],

[

  AC_REQUIRE([AS_NANO])

  dnl Minimum required version of GLib

  GLIB_REQ=[$1]

  if test "x$GLIB_REQ" = "x"

  then

    AC_MSG_ERROR([Please specify a required version for GLib 2.0])

  fi

  AC_SUBST(GLIB_REQ)

  dnl Check for glib with everything

  AG_GST_PKG_CHECK_MODULES(GLIB,

    glib-2.0 >= $GLIB_REQ gobject-2.0 gmodule-no-export-2.0)

  if test "x$HAVE_GLIB" = "xno"; then

    AC_MSG_ERROR([This package requires GLib >= $GLIB_REQ to compile.])

  fi

  dnl Add define to tell GLib that threading is always enabled within GStreamer

  dnl code (optimisation, bypasses checks if the threading system is enabled

  dnl when using threading primitives)

  GLIB_EXTRA_CFLAGS="$GLIB_EXTRA_CFLAGS -DG_THREADS_MANDATORY"

  dnl Define G_DISABLE_DEPRECATED for development versions

  if test "x`expr $PACKAGE_VERSION_MINOR % 2`" = "x1" -a "x`expr $PACKAGE_VERSION_MICRO '<' 90`" = "x1"; then

    GLIB_EXTRA_CFLAGS="$GLIB_EXTRA_CFLAGS -DG_DISABLE_DEPRECATED"

  fi

  AC_ARG_ENABLE(gobject-cast-checks,

    AS_HELP_STRING([--enable-gobject-cast-checks[=@<:@no/auto/yes@:>@]],

      [Enable GObject cast checks]),[enable_gobject_cast_checks=$enableval],

    [enable_gobject_cast_checks=auto])

  if test "x$enable_gobject_cast_checks" = "xauto"; then

    dnl Turn on cast checks only for development versions

    if test "x`expr $PACKAGE_VERSION_MINOR % 2`" = "x1" -a "x`expr $PACKAGE_VERSION_MICRO '<' 90`" = "x1"; then

      enable_gobject_cast_checks=yes

    else

      enable_gobject_cast_checks=no

    fi

  fi

  if test "x$enable_gobject_cast_checks" = "xno"; then

    GLIB_EXTRA_CFLAGS="$GLIB_EXTRA_CFLAGS -DG_DISABLE_CAST_CHECKS"

  fi

  AC_ARG_ENABLE(glib-asserts,

    AS_HELP_STRING([--enable-glib-asserts[=@<:@no/yes@:>@]],

      [Enable GLib assertion]),[enable_glib_assertions=$enableval],

    [enable_glib_assertions=yes])

  if test "x$enable_glib_assertions" = "xno"; then

    GLIB_EXTRA_CFLAGS="$GLIB_EXTRA_CFLAGS -DG_DISABLE_ASSERT"

  fi

  dnl Find location of glib utils. People may want to or have to override these,

  dnl e.g. in a cross-compile situation where PATH is a bit messed up. We need

  dnl for these tools to work on the host, so can't just use the one from the

  dnl GLib installation that pkg-config picks up, as that might be for a

  dnl different target architecture.

  dnl

  dnl glib-genmarshal:

  AC_MSG_CHECKING(for glib-genmarshal)

  if test "x$GLIB_GENMARSHAL" != "x"; then

    AC_MSG_RESULT([$GLIB_GENMARSHAL (from environment)])

  else

    GLIB_GENMARSHAL=`$PKG_CONFIG --variable=glib_genmarshal glib-2.0`

    if $GLIB_GENMARSHAL --version 2>/dev/null >/dev/null; then

      AC_MSG_RESULT([$GLIB_GENMARSHAL (from pkg-config path)])

    else

      AC_PATH_PROG(GLIB_GENMARSHAL, [glib-genmarshal], [glib-genmarshal])

      AC_MSG_RESULT([$GLIB_GENMARSHAL])

    fi

  fi

  if ! $GLIB_GENMARSHAL --version 2>/dev/null >/dev/null; then

    AC_MSG_WARN([$GLIB_GENMARSHAL does not seem to work!])

  fi

  AC_SUBST(GLIB_GENMARSHAL)

  dnl glib-mkenums:

  AC_MSG_CHECKING(for glib-mkenums)

  if test "x$GLIB_MKENUMS" != "x"; then

    AC_MSG_RESULT([$GLIB_MKENUMS (from environment)])

  else

    dnl glib-mkenums is written in perl so should always work really

    GLIB_MKENUMS=`$PKG_CONFIG --variable=glib_mkenums glib-2.0`

    AC_MSG_RESULT([$GLIB_MKENUMS])

  fi

  if ! $GLIB_MKENUMS --version 2>/dev/null >/dev/null; then

    AC_MSG_WARN([$GLIB_MKENUMS does not seem to work!])

  fi

  AC_SUBST(GLIB_MKENUMS)

  AC_SUBST(GLIB_EXTRA_CFLAGS)

  dnl Now check for GIO

  PKG_CHECK_MODULES(GIO, gio-2.0 >= $GLIB_REQ)

  if test "x$HAVE_GIO" = "xno"; then

    AC_MSG_ERROR([This package requires GIO >= $GLIB_REQ to compile.])

  fi

  GIO_MODULE_DIR="`$PKG_CONFIG --variable=giomoduledir gio-2.0`"

  AC_DEFINE_UNQUOTED(GIO_MODULE_DIR, "$GIO_MODULE_DIR",

      [The GIO modules directory.])

  GIO_LIBDIR="`$PKG_CONFIG --variable=libdir gio-2.0`"

  AC_DEFINE_UNQUOTED(GIO_LIBDIR, "$GIO_LIBDIR",

      [The GIO library directory.])

  GIO_PREFIX="`$PKG_CONFIG --variable=prefix gio-2.0`"

  AC_DEFINE_UNQUOTED(GIO_PREFIX, "$GIO_PREFIX",

      [The GIO install prefix.])

  AC_SUBST(GIO_CFLAGS)

  AC_SUBST(GIO_LIBS)

  AC_SUBST(GIO_LDFLAGS)

])