configure.ac 59.4 KB
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# Process this file with autoconf to produce a configure script.
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# Making releases:
#   GTK_MICRO_VERSION += 1;
#   GTK_INTERFACE_AGE += 1;
#   GTK_BINARY_AGE += 1;
# if any functions have been added, set GTK_INTERFACE_AGE to 0.
# if backwards compatibility has been broken,
# set GTK_BINARY_AGE and GTK_INTERFACE_AGE to 0.

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m4_define([gtk_major_version], [3])
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m4_define([gtk_minor_version], [11])
m4_define([gtk_micro_version], [0])
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m4_define([gtk_interface_age], [0])
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m4_define([gtk_binary_age],
          [m4_eval(100 * gtk_minor_version + gtk_micro_version)])
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m4_define([gtk_version],
          [gtk_major_version.gtk_minor_version.gtk_micro_version])
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# This is the X.Y used in -lgtk-FOO-X.Y
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m4_define([gtk_api_version], [3.0])
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AC_PREREQ([2.62])
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AC_INIT([gtk+], [gtk_version],
        [http://bugzilla.gnome.org/enter_bug.cgi?product=gtk%2B],
        [gtk+])

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AC_CONFIG_HEADERS([config.h])
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AC_CONFIG_SRCDIR([gdk/gdktypes.h])
AC_CONFIG_MACRO_DIR([m4])
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AC_CONFIG_AUX_DIR([build-aux])
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AC_CANONICAL_HOST

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# Define a string for the earliest version that this release has
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# backwards binary compatibility with for all interfaces a module
# might. Unless we add module-only API with lower stability
# guarantees, this should be unchanged until we break binary compat
# for GTK+.
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#
#GTK_BINARY_VERSION=$GTK_MAJOR_VERSION.$GTK_MINOR_VERSION.$LT_CURRENT
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m4_define([gtk_binary_version], [3.0.0])
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# required versions of other packages
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m4_define([glib_required_version], [2.37.5])
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m4_define([pango_required_version], [1.32.4])
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m4_define([atk_required_version], [2.7.5])
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m4_define([cairo_required_version], [1.12.0])
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m4_define([gdk_pixbuf_required_version], [2.27.1])
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m4_define([introspection_required_version], [1.32.0])
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GLIB_REQUIRED_VERSION=glib_required_version
PANGO_REQUIRED_VERSION=pango_required_version
ATK_REQUIRED_VERSION=atk_required_version
CAIRO_REQUIRED_VERSION=cairo_required_version
GDK_PIXBUF_REQUIRED_VERSION=gdk_pixbuf_required_version
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INTROSPECTION_REQUIRED_VERSION=introspection_required_version

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AC_SUBST(GLIB_REQUIRED_VERSION)
AC_SUBST(PANGO_REQUIRED_VERSION)
AC_SUBST(ATK_REQUIRED_VERSION)
AC_SUBST(CAIRO_REQUIRED_VERSION)
AC_SUBST(GDK_PIXBUF_REQUIRED_VERSION)
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AC_SUBST(INTROSPECTION_REQUIRED_VERSION)
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# Save this value here, since automake will set cflags later
cflags_set=${CFLAGS+set}

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AM_INIT_AUTOMAKE([1.11 -Wall no-define -Wno-portability tar-ustar no-dist-gzip dist-xz])
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AM_MAINTAINER_MODE([enable])
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# Support silent build rules. Disable
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# by either passing --disable-silent-rules to configure or passing V=1
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# to make
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AM_SILENT_RULES([yes])
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#
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# For each of the libraries we build, we define the following
# substituted variables:
#
# foo_PACKAGES:     pkg-config packages this library requires
# foo_EXTRA_LIBS:   Libraries this module requires not pulled in by pkg-config
# foo_EXTRA_CFLAGS: cflags this module requires not pulled in by pkg-config
# foo_DEP_LIBS:     All libraries this module requires
# foo_DEP_CFLAGS:   All cflags this module requires
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GTK_MAJOR_VERSION=gtk_major_version
GTK_MINOR_VERSION=gtk_minor_version
GTK_MICRO_VERSION=gtk_micro_version
GTK_INTERFACE_AGE=gtk_interface_age
GTK_BINARY_AGE=gtk_binary_age
GTK_VERSION=gtk_version
GTK_API_VERSION=gtk_api_version
GTK_BINARY_VERSION=gtk_binary_version
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AC_SUBST(GTK_MAJOR_VERSION)
AC_SUBST(GTK_MINOR_VERSION)
AC_SUBST(GTK_MICRO_VERSION)
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AC_SUBST(GTK_INTERFACE_AGE)
AC_SUBST(GTK_BINARY_AGE)
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AC_SUBST(GTK_API_VERSION)
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AC_SUBST(GTK_VERSION)
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AC_SUBST(GTK_BINARY_VERSION)
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# libtool versioning
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#LT_RELEASE=$GTK_MAJOR_VERSION.$GTK_MINOR_VERSION
#LT_CURRENT=`expr $GTK_MICRO_VERSION - $GTK_INTERFACE_AGE`
#LT_REVISION=$GTK_INTERFACE_AGE
#LT_AGE=`expr $GTK_BINARY_AGE - $GTK_INTERFACE_AGE`
#LT_CURRENT_MINUS_AGE=`expr $LT_CURRENT - $LT_AGE`

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m4_define([lt_current], [m4_eval(100 * gtk_minor_version + gtk_micro_version - gtk_interface_age)])
m4_define([lt_revision], [gtk_interface_age])
m4_define([lt_age], [m4_eval(gtk_binary_age - gtk_interface_age)])
LT_VERSION_INFO="lt_current:lt_revision:lt_age"
LT_CURRENT_MINUS_AGE=m4_eval(lt_current - lt_age)
AC_SUBST(LT_VERSION_INFO)
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AC_SUBST(LT_CURRENT_MINUS_AGE)
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m4_define([gail_lt_current],[0])
m4_define([gail_lt_revision],[0])
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m4_define([gail_lt_age],[0])
m4_define([gail_lt_version_info],[gail_lt_current:gail_lt_revision:gail_lt_age])
m4_define([gail_lt_current_minus_age],[m4_eval(gail_lt_current - gail_lt_age)])
AC_SUBST([GAIL_LT_VERSION_INFO],[gail_lt_version_info])
AC_SUBST([GAIL_LT_CURRENT_MINUS_AGE],[gail_lt_current_minus_age])
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# Checks for programs.
AC_PROG_CC
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AX_PROG_CC_FOR_BUILD
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AC_PROG_CC_C_O
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AC_PROG_MKDIR_P
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AC_PROG_INSTALL
AC_PROG_MAKE_SET


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GETTEXT_PACKAGE=gtk30
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AC_SUBST(GETTEXT_PACKAGE)
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AC_DEFINE_UNQUOTED(GETTEXT_PACKAGE, "$GETTEXT_PACKAGE",
                   [The prefix for our gettext translation domains.])
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MATH_LIB=-lm
AC_MSG_CHECKING([for native Win32])
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LIB_EXE_MACHINE_FLAG=X86
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EXE_MANIFEST_ARCHITECTURE=X86
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DISABLE_ON_W32=''
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case "$host" in
  *-*-mingw*)
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    dnl Comment-out certain gtk3.types.in lines
    DISABLE_ON_W32='%'
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    os_win32=yes
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    gio_can_sniff=no
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    MATH_LIB=
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    case "$host" in
    x86_64-*-*)
      LIB_EXE_MACHINE_FLAG=X64
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      EXE_MANIFEST_ARCHITECTURE=AMD64
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      ;;
    esac
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    ;;
  *)
    os_win32=no
    ;;
esac
AC_MSG_RESULT([$os_win32])
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AC_SUBST(DISABLE_ON_W32)
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AC_SUBST(LIB_EXE_MACHINE_FLAG)
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AC_SUBST(EXE_MANIFEST_ARCHITECTURE)
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case $host in
  *-*-linux*)
    os_linux=yes
    ;;
esac
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dnl
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dnl Check for a working C++ compiler, but do not bail out, if none is found.
dnl We use this for an automated test for C++ header correctness.
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dnl
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AC_CHECK_TOOLS(CXX, [$CCC c++ g++ gcc CC cxx cc++ cl], gcc)
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AC_LANG_PUSH([C++])
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]],
                                   [[class a { int b; } c;]])],
                  [],[CXX=])
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AM_CONDITIONAL(HAVE_CXX, test "$CXX" != "")
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gtk_save_cxxflags="$CXXFLAGS"
CXXFLAGS="$CXXFLAGS -x objective-c++"
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@interface Foo @end]],
                                   [[]])],
                  [OBJC=yes],[OBJC=no])
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AM_CONDITIONAL(HAVE_OBJC, test "$OBJC" = "yes")
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CXXFLAGS="$gtk_save_cxxflags"
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AC_LANG_POP([C++])
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if test "$os_win32" = "yes"; then
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  if test x$enable_static = xyes -o x$enable_static = x; then
    AC_MSG_WARN([Disabling static library build, must build as DLL on Windows.])
    enable_static=no
  fi
  if test x$enable_shared = xno; then
    AC_MSG_WARN([Enabling shared library build, must build as DLL on Windows.])
  fi
  enable_shared=yes
fi

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dnl Initialize libtool
LT_PREREQ([2.2.6])
LT_INIT([disable-static win32-dll])
# Create libtool early, because it's used in configure
LT_OUTPUT
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# Make sure we use 64-bit versions of various file stuff.
AC_SYS_LARGEFILE

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AM_PROG_AS
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AC_PATH_PROG(NM, nm, nm)
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AC_MSG_CHECKING([for some Win32 platform])
case "$host" in
  *-*-mingw*|*-*-cygwin*)
    platform_win32=yes
    ;;
  *)
    platform_win32=no
    ;;
esac
AC_MSG_RESULT([$platform_win32])
AM_CONDITIONAL(PLATFORM_WIN32, test "$platform_win32" = "yes")

AM_CONDITIONAL(OS_WIN32, test "$os_win32" = "yes")
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AM_CONDITIONAL(OS_UNIX, test "$os_win32" != "yes")
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AM_CONDITIONAL(OS_LINUX, test "$os_linux" = "yes")
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if test "$os_win32" = "yes"; then
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  AC_CHECK_TOOL(WINDRES, windres, no)
  if test "$WINDRES" = no; then
    AC_MSG_ERROR([*** Could not find an implementation of windres in your PATH.])
  fi
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  AC_CHECK_PROG(ms_librarian, lib.exe, yes, no)
fi
AM_CONDITIONAL(MS_LIB_AVAILABLE, test x$ms_librarian = xyes)

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m4_define([debug_default],
          m4_if(m4_eval(gtk_minor_version % 2), [1], [yes], [minimum]))
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dnl declare --enable-* args and collect ac_help strings
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AC_ARG_ENABLE(debug,
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              [AS_HELP_STRING([--enable-debug=@<:@no/minimum/yes@:>@],
                              [turn on debugging @<:@default=debug_default@:>@])],,
              [enable_debug=debug_default])
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AC_ARG_ENABLE(installed_tests,
              AS_HELP_STRING([--enable-installed-tests],
                             [Install test programs (default: no)]),,
              [enable_installed_tests=no])
AM_CONDITIONAL(BUILDOPT_INSTALL_TESTS, test x$enable_installed_tests = xyes)
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AC_ARG_ENABLE(gtk2-dependency,
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              [AS_HELP_STRING([--enable-gtk2-dependency],
                              [Do not build gtk-update-icon-cache and other shared tools])],,
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              [enable_gtk2_dependency=no])

AM_CONDITIONAL(BUILD_ICON_CACHE, [test "x$enable_gtk2_dependency" = xno])

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AC_ARG_ENABLE(xkb,
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              [AS_HELP_STRING([--enable-xkb],
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                              [support XKB extension [default=maybe]])],,
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              [enable_xkb="maybe"])
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AC_ARG_ENABLE(xinerama,
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              [AS_HELP_STRING([--enable-xinerama],
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	                      [support Xinerama extension [default=maybe]])],,
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              [enable_xinerama="maybe"])
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AC_ARG_ENABLE(xrandr,
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              [AS_HELP_STRING([--enable-xrandr],
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                              [support XRandR extension [default=maybe]])],,
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              [enable_xrandr="maybe"])
AC_ARG_ENABLE(xfixes,
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              [AS_HELP_STRING([--enable-xfixes],
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                              [support XFixes extension [default=maybe]])],,
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              [enable_xfixes="maybe"])
AC_ARG_ENABLE(xcomposite,
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              [AS_HELP_STRING([--enable-xcomposite],
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                              [support X Composite extension [default=maybe]])],,
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              [enable_xcomposite="maybe"])
AC_ARG_ENABLE(xdamage,
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              [AS_HELP_STRING([--enable-xdamage],
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                              [support X Damage extension [default=maybe]])],,
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              [enable_xdamage="maybe"])
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AC_ARG_ENABLE(x11-backend,
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              [AS_HELP_STRING([--enable-x11-backend],
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                              [enable the X11 gdk backend])],
			      [backend_set=yes])
AC_ARG_ENABLE(win32-backend,
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              [AS_HELP_STRING([--enable-win32-backend],
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                              [enable the Win32 gdk backend])],
			      [backend_set=yes])
AC_ARG_ENABLE(quartz-backend,
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              [AS_HELP_STRING([--enable-quartz-backend],
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                              [enable the quartz gdk backend])],
			      [backend_set=yes])
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AC_ARG_ENABLE(broadway-backend,
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              [AS_HELP_STRING([--enable-broadway-backend],
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                              [enable the broadway (HTML5) gdk backend])],
			      [backend_set=yes])
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AC_ARG_ENABLE(wayland-backend,
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              [AS_HELP_STRING([--enable-wayland-backend],
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                              [enable the wayland gdk backend])],
			      [backend_set=yes])
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if test -z "$backend_set"; then
  if test "$platform_win32" = yes; then
    enable_win32_backend=yes
  else
    enable_x11_backend=yes
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    enable_wayland_backend=maybe
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  fi
fi

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AC_ARG_ENABLE(quartz-relocation,
              [AS_HELP_STRING([--enable-quartz-relocation],
                              [enable bundle-based relocation functions])],
                              [quartz_relocation=yes])

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cairo_backends=
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backend_immodules=
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have_gio_unix=no
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GDK_BACKENDS=
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GDK_EXTRA_LIBS=
GDK_EXTRA_CFLAGS=
GDK_WINDOWING=
PANGO_PACKAGES="pango pangocairo"
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if test "$enable_x11_backend" = "yes"; then
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  # GDK calls the xlib backend "x11," cairo calls it "xlib." Other
  # backend names are identical.
  cairo_backends="$cairo_backends cairo-xlib"
  GDK_BACKENDS="$GDK_BACKENDS x11"
  # Pull in gio-unix for GDesktopAppInfo usage, see at least
  # gdkapplaunchcontext-x11.c
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  have_gio_unix=yes
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  backend_immodules="$backend_immodules,xim"
  GDK_WINDOWING="$GDK_WINDOWING
#define GDK_WINDOWING_X11"
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fi
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if test "$enable_win32_backend" = "yes"; then
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  cairo_backends="$cairo_backends cairo-win32"
  GDK_BACKENDS="$GDK_BACKENDS win32"
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  backend_immodules="$backend_immodules,ime"
  GDK_WINDOWING="$GDK_WINDOWING
#define GDK_WINDOWING_WIN32"
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  GDK_EXTRA_LIBS="$GDK_EXTRA_LIBS -lgdi32 -limm32 -lshell32 -lole32 -Wl,-luuid -lwinmm"
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  AM_CONDITIONAL(USE_WIN32, true)
  PANGO_PACKAGES="pangowin32 pangocairo"
else
  AM_CONDITIONAL(USE_WIN32, false)
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fi
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DISABLE_ON_QUARTZ=''
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if test "x$enable_quartz_backend" = xyes; then
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  cairo_backends="$cairo_backends cairo-quartz"
  GDK_BACKENDS="$GDK_BACKENDS quartz"
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  backend_immodules="$backend_immodules,quartz"
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  GDK_WINDOWING="$GDK_WINDOWING
#define GDK_WINDOWING_QUARTZ"
  GDK_EXTRA_LIBS="$GDK_EXTRA_LIBS -framework Cocoa"
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  DISABLE_ON_QUARTZ='%'
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  AM_CONDITIONAL(USE_QUARTZ, true)
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  if test "x$quartz_relocation" = xyes; then
    AC_DEFINE([QUARTZ_RELOCATION], [1], [Use NSBundle functions to determine load paths for libraries, translations, etc.])
  fi
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  # Pull in gio-unix for GDesktopAppInfo usage, see at least
  # gdkapplaunchcontext-x11.c
  have_gio_unix=yes
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else
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  AM_CONDITIONAL(USE_QUARTZ, false)
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fi
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AC_SUBST(DISABLE_ON_QUARTZ)
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if test "x$enable_broadway_backend" = xyes; then
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  GDK_BACKENDS="$GDK_BACKENDS broadway"
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  cairo_backends="$cairo_backends cairo"
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  if test "$os_unix" = "yes"; then
    have_gio_unix=yes
  fi
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  GDK_WINDOWING="$GDK_WINDOWING
#define GDK_WINDOWING_BROADWAY"
  GDK_EXTRA_LIBS="$GDK_EXTRA_LIBS -lz"
  AM_CONDITIONAL(USE_BROADWAY, true)
else
  AM_CONDITIONAL(USE_BROADWAY, false)
fi
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PKG_PROG_PKG_CONFIG

WAYLAND_DEPENDENCIES="wayland-client >= 1.2.0 xkbcommon >= 0.2.0 wayland-cursor"
if test "$enable_wayland_backend" = "maybe" ; then
  AC_PATH_PROG([WAYLAND_SCANNER],[wayland-scanner],[no])
  PKG_CHECK_EXISTS($WAYLAND_DEPENDENCIES, [have_wayland_deps=yes], [have_wayland_deps=no])
  AC_MSG_CHECKING([for WAYLAND_DEPENDENCIES])
  if test "$WAYLAND_SCANNER" = "no" -o "$have_wayland_deps" = "no" ; then
    enable_wayland_backend=no
  else
    enable_wayland_backend=yes
  fi
  AC_MSG_RESULT($enable_wayland_backend)
fi

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DISABLE_ON_WAYLAND=''
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if test "$enable_wayland_backend" = "yes"; then
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  # For the cairo image backend
  cairo_backends="$cairo_backends cairo"
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  GDK_BACKENDS="$GDK_BACKENDS wayland"
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  have_gio_unix=yes
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  GDK_WINDOWING="$GDK_WINDOWING
#define GDK_WINDOWING_WAYLAND"
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  DISABLE_ON_WAYLAND='%'
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  WAYLAND_PACKAGES="$WAYLAND_DEPENDENCIES"
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  AC_PATH_PROG([WAYLAND_SCANNER],[wayland-scanner],[no])
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  AS_IF([test "x$WAYLAND_SCANNER" = "xno"],
    AC_MSG_ERROR([Could not find wayland-scanner in your PATH, required for parsing wayland extension protocols]))
  AC_SUBST([WAYLAND_SCANNER])

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  AM_CONDITIONAL(USE_WAYLAND, true)
else
  AM_CONDITIONAL(USE_WAYLAND, false)
fi
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AC_SUBST(DISABLE_ON_WAYLAND)
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# strip leading space
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GDK_BACKENDS=${GDK_BACKENDS#* }
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AC_SUBST(GDK_BACKENDS)
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if test -z "$GDK_BACKENDS"; then
  AC_MSG_ERROR([No GDK backends selected.])
fi
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if test "x$enable_debug" = "xyes"; then
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  test "$cflags_set" = set || CFLAGS="$CFLAGS -g"
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  GTK_DEBUG_FLAGS="-DG_ENABLE_DEBUG"
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else
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  if test "x$enable_debug" = "xno"; then
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    GTK_DEBUG_FLAGS="-DG_DISABLE_ASSERT -DG_DISABLE_CHECKS -DG_DISABLE_CAST_CHECKS"
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  else
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    GTK_DEBUG_FLAGS="-DG_ENABLE_DEBUG -DG_DISABLE_CAST_CHECKS"
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  fi
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fi

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AC_DEFINE_UNQUOTED(GTK_COMPILED_WITH_DEBUGGING, "${enable_debug}",
                   [Define if debugging is enabled])
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# Build time sanity check...
AM_SANITY_CHECK

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changequote(,)dnl
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if test "x$GCC" = "xyes"; then
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  case " $CFLAGS " in
  *[\ \	]-Wall[\ \	]*) ;;
  *) CFLAGS="$CFLAGS -Wall" ;;
  esac
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  if test "x$enable_ansi" = "xyes"; then
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    case " $CFLAGS " in
    *[\ \	]-ansi[\ \	]*) ;;
    *) CFLAGS="$CFLAGS -ansi" ;;
    esac

    case " $CFLAGS " in
    *[\ \	]-pedantic[\ \	]*) ;;
    *) CFLAGS="$CFLAGS -pedantic" ;;
    esac
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  fi
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fi
changequote([,])dnl
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# Ensure MSVC-compatible struct packing convention is used when
# compiling for Win32 with gcc.
# What flag to depends on gcc version: gcc3 uses "-mms-bitfields", while
# gcc2 uses "-fnative-struct".
if test x"$os_win32" = xyes; then
  if test x"$GCC" = xyes; then
    msnative_struct=''
    AC_MSG_CHECKING([how to get MSVC-compatible struct packing])
    if test -z "$ac_cv_prog_CC"; then
      our_gcc="$CC"
    else
      our_gcc="$ac_cv_prog_CC"
    fi
    case `$our_gcc --version | sed -e 's,\..*,.,' -e q` in
      2.)
	if $our_gcc -v --help 2>/dev/null | grep fnative-struct >/dev/null; then
	  msnative_struct='-fnative-struct'
	fi
	;;
      *)
	if $our_gcc -v --help 2>/dev/null | grep ms-bitfields >/dev/null; then
	  msnative_struct='-mms-bitfields'
	fi
	;;
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    esac
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    if test x"$msnative_struct" = x ; then
      AC_MSG_RESULT([no way])
      AC_MSG_WARN([produced libraries might be incompatible with MSVC-compiled code])
    else
      CFLAGS="$CFLAGS $msnative_struct"
      AC_MSG_RESULT([${msnative_struct}])
    fi
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  fi
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fi

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## Initial sanity check, done here so that users get told they
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## have the wrong dependencies as early in the process as possible.
## Later on we actually use the cflags/libs from separate pkg-config
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## calls. Oh, also the later pkg-config calls don't include
## the version requirements since those make the module lists
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## annoying to construct
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PKG_CHECK_MODULES(BASE_DEPENDENCIES,
  [glib-2.0 >= glib_required_version dnl
   atk >= atk_required_version dnl
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   pango >= pango_required_version dnl
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   cairo >= cairo_required_version dnl
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   cairo-gobject >= cairo_required_version dnl
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   gdk-pixbuf-2.0 >= gdk_pixbuf_required_version])
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PKG_CHECK_MODULES(CAIRO_BACKEND, [$cairo_backends])
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PKG_CHECK_MODULES(GMODULE, [gmodule-2.0])

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dnl ******************************************************
dnl * See whether to include shared library dependencies *
dnl ******************************************************

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AC_ARG_ENABLE(explicit-deps,
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              [AS_HELP_STRING([--enable-explicit-deps=@<:@yes/no/auto@:>@],
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                              [use explicit dependencies in .pc files [default=auto]])],,
              [enable_explicit_deps=auto])
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AC_MSG_CHECKING([whether to write dependencies into .pc files])
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case $enable_explicit_deps in
  auto)
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    export SED
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    deplibs_check_method=`(./libtool --config; echo 'eval echo \"$deplibs_check_method\"') | sh`
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    if test "x$deplibs_check_method" != xpass_all || test "x$enable_static" = xyes ; then
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      enable_explicit_deps=yes
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    else
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      enable_explicit_deps=no
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    fi
  ;;
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  yes|no)
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  ;;
  *) AC_MSG_ERROR([Value given to --enable-explicit-deps must be one of yes, no or auto])
  ;;
esac
AC_MSG_RESULT($enable_explicit_deps)

AM_CONDITIONAL(DISABLE_EXPLICIT_DEPS, test $enable_explicit_deps = no)

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# define a MAINT-like variable REBUILD which is set if Perl
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# and awk are found, so autogenerated sources can be rebuilt

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AC_PATH_PROGS(PERL, perl5 perl)
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AC_CHECK_FUNCS(lstat mkstemp)
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AC_CHECK_FUNCS(localtime_r)
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# _NL_TIME_FIRST_WEEKDAY is an enum and not a define
AC_MSG_CHECKING([for _NL_TIME_FIRST_WEEKDAY])
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <langinfo.h>]],
                                [[char c;
                                  c = *((unsigned char *)  nl_langinfo(_NL_TIME_FIRST_WEEKDAY));]])],
               [gtk_ok=yes], [gtk_ok=no])
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AC_MSG_RESULT($gtk_ok)
if test "$gtk_ok" = "yes"; then
  AC_DEFINE([HAVE__NL_TIME_FIRST_WEEKDAY], [1],
	    [Define if _NL_TIME_FIRST_WEEKDAY is available])
fi
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# _NL_MEASUREMENT_MEASUREMENT is an enum and not a define
AC_MSG_CHECKING([for _NL_MEASUREMENT_MEASUREMENT])
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <langinfo.h>]],
                                [[char c;
                                  c = *((unsigned char *)  nl_langinfo(_NL_MEASUREMENT_MEASUREMENT));]])],
               [gtk_ok=yes], [gtk_ok=no])
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AC_MSG_RESULT($gtk_ok)
if test "$gtk_ok" = "yes"; then
  AC_DEFINE([HAVE__NL_MEASUREMENT_MEASUREMENT], [1],
	    [Define if _NL_MEASUREMENT_MEASUREMENT is available])
fi

# _NL_PAPER_HEIGHT is an enum and not a define
AC_MSG_CHECKING([for _NL_PAPER_HEIGHT])
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <langinfo.h>]],
                                [[char c;
                                  c = *((unsigned char *)  nl_langinfo(_NL_PAPER_HEIGHT));]])],
               [gtk_ok=yes], [gtk_ok=no])
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AC_MSG_RESULT($gtk_ok)
if test "$gtk_ok" = "yes"; then
  AC_DEFINE([HAVE__NL_PAPER_HEIGHT], [1],
	    [Define if _NL_PAPER_HEIGHT is available])
fi

# _NL_PAPER_WIDTH is an enum and not a define
AC_MSG_CHECKING([for _NL_PAPER_WIDTH])
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <langinfo.h>]],
                                [[char c;
                                  c = *((unsigned char *)  nl_langinfo(_NL_PAPER_WIDTH));]])],
               [gtk_ok=yes], [gtk_ok=no])
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AC_MSG_RESULT($gtk_ok)
if test "$gtk_ok" = "yes"; then
  AC_DEFINE([HAVE__NL_PAPER_WIDTH], [1],
	    [Define if _NL_PAPER_WIDTH is available])
fi
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# i18n stuff
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ALL_LINGUAS="`grep -v '^#' "$srcdir/po/LINGUAS" | tr '\n' ' '`"
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AM_GLIB_GNU_GETTEXT
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LIBS="$LIBS $INTLLIBS"
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AC_CONFIG_COMMANDS([po-properties],
                   [[case "$CONFIG_FILES" in *po-properties/Makefile.in*)
                       sed -e "/POTFILES =/r po-properties/POTFILES" po-properties/Makefile.in > po-properties/Makefile
                     esac]],
                   [[]])
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dnl Snippet below is copied from AM_GLIB_GNU_GETTEXT to generate a first
dnl po-properties/POTFILES during configure; see GNOME #573515.
dnl
dnl Generate list of files to be processed by xgettext which will
dnl be included in po-properties/Makefile.
test -d po-properties || mkdir po-properties
if test "x$srcdir" != "x."; then
  if test "x`echo $srcdir | sed 's@/.*@@'`" = "x"; then
    popropsrcprefix="$srcdir/"
  else
    popropsrcprefix="../$srcdir/"
  fi
else
  popropsrcprefix="../"
fi
rm -f po-properties/POTFILES
sed -e "/^#/d" -e "/^\$/d" -e "s,.*,	$popropsrcprefix& \\\\," -e "\$s/\(.*\) \\\\/\1/" \
< $srcdir/po-properties/POTFILES.in > po-properties/POTFILES
dnl (End of adapted AM_GLIB_GNU_GETTEXT snippet.)

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AM_GLIB_DEFINE_LOCALEDIR(GTK_LOCALEDIR)
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dnl The DU4 header files don't provide library prototypes unless
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dnl -std1 is given to the native cc.
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AC_MSG_CHECKING([for extra flags to get ANSI library prototypes])
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gtk_save_LIBS=$LIBS
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LIBS="$LIBS -lm"
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AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <math.h>
                                int main (void) { return (log(1) != log(1.)); }]])],
              [AC_MSG_RESULT(none needed)],
              [gtk_save_CFLAGS="$CFLAGS"
               CFLAGS="$CFLAGS -std1"
               AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <math.h>
                                               int main (void) { return (log(1) != log(1.)); }]])],
                             [AC_MSG_RESULT(-std1)],
                             [AC_MSG_RESULT()
                              CFLAGS="$gtk_save_CFLAGS"
                              AC_MSG_WARN([No ANSI prototypes found in library. (-std1 did not work.)])],
                             [true])],
              [AC_MSG_RESULT(none needed)])

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LIBS=$gtk_save_LIBS

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AC_MSG_CHECKING(for the BeOS)
case $host in
  *-*-beos*)
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    AC_MSG_RESULT(yes)
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    MATH_LIB=
  ;;
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  *)
    AC_MSG_RESULT(no)
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  ;;
esac
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AC_SUBST(MATH_LIB)
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#
# see bug 162979
#
AC_MSG_CHECKING(for HP-UX)
case $host_os in
  hpux9* | hpux10* | hpux11*)
    AC_MSG_RESULT(yes)
    CFLAGS="$CFLAGS -DHPPEX -DSHMLINK"
  ;;
  *)
    AC_MSG_RESULT(no)
  ;;
esac
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#
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# Run AM_PATH_GLIB_2_0 to make sure that GLib is installed and working
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#
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AM_PATH_GLIB_2_0(glib_required_version, :,
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  AC_MSG_ERROR([
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*** GLIB glib_required_version or better is required. The latest version of
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*** GLIB is always available from ftp://ftp.gtk.org/pub/gtk/.]),
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  gobject gmodule-no-export)
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PKG_PROG_PKG_CONFIG_FOR_BUILD
GLIB_CFLAGS_FOR_BUILD=`$PKG_CONFIG_FOR_BUILD --cflags glib-2.0 gobject-2.0 gmodule-no-export-2.0`
GLIB_LIBS_FOR_BUILD=`$PKG_CONFIG_FOR_BUILD --libs glib-2.0 gobject-2.0 gmodule-no-export-2.0`
AC_SUBST(GLIB_CFLAGS_FOR_BUILD)
AC_SUBST(GLIB_LIBS_FOR_BUILD)

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dnl Check for bind_textdomain_codeset, including -lintl if GLib brings it in.
dnl
gtk_save_LIBS=$LIBS
LIBS="$LIBS $GLIB_LIBS"
AC_CHECK_FUNCS(bind_textdomain_codeset)
LIBS=$gtk_save_LIBS

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AC_CHECK_HEADERS(pwd.h,
                 AC_DEFINE(HAVE_PWD_H, 1,
                           [Define to 1 if pwd.h is available]))
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AC_CHECK_HEADERS(sys/mman.h,
                 AC_DEFINE(HAVE_SYS_MMAN_H, 1,
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                           [Define to 1 if mman.h is available]))
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AC_CHECK_HEADERS(sys/time.h,
                 AC_DEFINE(HAVE_SYS_TIME_H, 1,
                           [Define to 1 if time.h is available]))
AC_CHECK_HEADERS(unistd.h,
                 AC_DEFINE(HAVE_UNISTD_H, 1,
                           [Define to 1 if unistd.h is available]))
AC_CHECK_HEADERS(ftw.h,
                 AC_DEFINE(HAVE_FTW_H, 1,
                           [Define to 1 if ftw.h is available]))
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AC_MSG_CHECKING([for GNU ftw extensions])
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#define _XOPEN_SOURCE 500
                                     #define _GNU_SOURCE
                                     #include <ftw.h>]],
                                   [[int flags = FTW_ACTIONRETVAL;]])],
                  [gtk_ok=yes],[gtk_ok=no])
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if test $gtk_ok = yes; then
    AC_MSG_RESULT([yes])
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    AC_DEFINE(HAVE_GNU_FTW, 1, [Have GNU ftw])
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else
    AC_MSG_RESULT([no])
fi

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#
# Disable deprecation checks for all libraries we depend on on stable branches.
# This is so newer versions of those libraries don't cause more warnings with
# a stable GTK version.
# We don't ever want to turn off deprecation warnings for master however, because
# that's where we get rid of deprecated API we use.
#
if test m4_eval(gtk_minor_version % 2) = 0 ; then
  AC_DEFINE_UNQUOTED(GLIB_DISABLE_DEPRECATION_WARNINGS, 1,
                     [Disable deprecation warnings from glib])
fi

dnl
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saved_cflags="$CFLAGS"
saved_ldflags="$LDFLAGS"

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# Checks for library functions.
AC_FUNC_MMAP
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AC_CHECK_FUNCS(mallinfo)
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AC_CHECK_FUNCS(getresuid)
AC_TYPE_UID_T
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# Check for round(), rint(), isnan(), isinf() and nearbyint()
AC_CHECK_LIB(m,round,,)
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AC_CHECK_FUNCS(round rint nearbyint)
AC_CHECK_DECLS([isnan, isinf], [], [], [[#include <math.h>]])
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# Checks for gdkspawn
AC_CHECK_HEADERS(crt_externs.h)
AC_CHECK_FUNCS(_NSGetEnviron)

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AC_MSG_CHECKING(whether to build dynamic modules)

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AC_ARG_ENABLE(modules,
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              [AS_HELP_STRING([--disable-modules],
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                              [disable dynamic module loading])])
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dynworks=false
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build_dynamic_modules=no
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deps=
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if test x$enable_modules = xno; then
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    AC_MSG_RESULT(no)
else
    AC_MSG_RESULT(yes)
    AC_MSG_CHECKING(whether dynamic modules work)
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    ## for loop is to strip newline
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    tmp=`$PKG_CONFIG --variable=gmodule_supported gmodule-no-export-2.0`
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    for I in $tmp; do
        dynworks=$I
    done
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    dnl Now we check to see if our libtool supports shared lib deps
    dnl (in a rather ugly way even)
    if $dynworks; then
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        module_libtool_config="${CONFIG_SHELL-/bin/sh} ./libtool --config"
        module_deplibs_check=`$module_libtool_config | \
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            grep '^[[a-z_]]*check[[a-z_]]*_method=[['\''"]]' | \
            sed 's/.*[['\''"]]\(.*\)[['\''"]]$/\1/'`
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        if test "x$module_deplibs_check" = "xnone" || \
           test "x$module_deplibs_check" = "xunknown" || \
           test "x$module_deplibs_check" = "x"; then
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            dynworks=false
        fi
    fi
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    if $dynworks; then
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        build_dynamic_modules=yes
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        AC_DEFINE(USE_GMODULE, 1,
                  [Define to 1 if gmodule works and should be used])
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        AC_MSG_RESULT(yes)
    else
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        build_dynamic_modules=no
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        AC_MSG_RESULT(no)
    fi
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fi
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AM_CONDITIONAL(BUILD_DYNAMIC_MODULES, $dynworks)
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#
# Allow building some or all immodules included
#
AC_MSG_CHECKING(immodules to build)

AC_ARG_WITH(included_immodules,
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            [AS_HELP_STRING([--with-included-immodules=MODULE1,MODULE2,...],
                            [build the specified input methods into gtk])])
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if $dynworks; then
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   :
else
   ## if the option was specified, leave it; otherwise disable included immodules
   if test x$with_included_immodules = xno; then
           with_included_immodules=yes
   fi
fi

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all_immodules="am-et,cedilla,cyrillic-translit,inuktitut,ipa,multipress,thai,ti-er,ti-et,viqr$backend_immodules"
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included_immodules=""
# If the switch specified without listing any specific ones, include all
if test "x$with_included_immodules" = xyes ; then
  included_immodules="$all_immodules"
else
  included_immodules="$with_included_immodules"
fi

AC_MSG_RESULT($included_immodules)
AM_CONDITIONAL(HAVE_INCLUDED_IMMMODULES, test "x$included_immodules" != x)

INCLUDED_IMMODULE_OBJ=
INCLUDED_IMMODULE_DEFINE=

IFS="${IFS= 	}"; gtk_save_ifs="$IFS"; IFS=","
for immodule in $included_immodules; do
 immodule_underscores=`echo $immodule | sed -e 's/-/_/g'`
 if echo "$all_immodules" | egrep "(^|,)$immodule(\$|,)" > /dev/null; then
   :
 else
   AC_MSG_ERROR([the specified input method $immodule does not exist])
 fi

 INCLUDED_IMMODULE_OBJ="$INCLUDED_IMMODULE_OBJ ../modules/input/libstatic-im-$immodule.la"
 INCLUDED_IMMODULE_DEFINE="$INCLUDED_IMMODULE_DEFINE -DINCLUDE_IM_$immodule_underscores"
 eval INCLUDE_$immodule_underscores=yes
done
IFS="$gtk_save_ifs"
AC_SUBST(INCLUDED_IMMODULE_OBJ)
AC_SUBST(INCLUDED_IMMODULE_DEFINE)

AM_CONDITIONAL(INCLUDE_IM_AM_ET, [test x"$INCLUDE_am_et" = xyes])
AM_CONDITIONAL(INCLUDE_IM_CEDILLA, [test x"$INCLUDE_cedilla" = xyes])
AM_CONDITIONAL(INCLUDE_IM_CYRILLIC_TRANSLIT, [test x"$INCLUDE_cyrillic_translit" = xyes])
AM_CONDITIONAL(INCLUDE_IM_IME, [test x"$INCLUDE_ime" = xyes])
AM_CONDITIONAL(INCLUDE_IM_INUKTITUT, [test x"$INCLUDE_inuktitut" = xyes])
AM_CONDITIONAL(INCLUDE_IM_IPA, [test x"$INCLUDE_ipa" = xyes])
AM_CONDITIONAL(INCLUDE_IM_MULTIPRESS, [test x"$INCLUDE_multipress" = xyes])
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AM_CONDITIONAL(INCLUDE_IM_QUARTZ, [test x"$INCLUDE_quartz" = xyes])
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AM_CONDITIONAL(INCLUDE_IM_THAI, [test x"$INCLUDE_thai" = xyes])
AM_CONDITIONAL(INCLUDE_IM_TI_ER, [test x"$INCLUDE_ti_er" = xyes])
AM_CONDITIONAL(INCLUDE_IM_TI_ET, [test x"$INCLUDE_ti_et" = xyes])
AM_CONDITIONAL(INCLUDE_IM_VIQR, [test x"$INCLUDE_viqr" = xyes])
AM_CONDITIONAL(INCLUDE_IM_XIM, [test x"$INCLUDE_xim" = xyes])

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# Checks to see whether we should include mediaLib
# support.
#
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AC_CHECK_HEADER(sys/systeminfo.h,
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                AC_DEFINE(HAVE_SYS_SYSTEMINFO_H, 1,
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                          [Define to 1 if sys/systeminfo.h is available]))
AC_CHECK_HEADER(sys/sysinfo.h,
                AC_DEFINE(HAVE_SYS_SYSINFO_H, 1,
                          [Define to 1 if sys/sysinfo.h is available]))
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dnl Look for a host system's gdk-pixbuf-csource if we are cross-compiling

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AM_CONDITIONAL(CROSS_COMPILING, test $cross_compiling = yes)
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AS_IF([test "x$enable_gtk2_dependency" = xyes],
      [AC_PATH_PROG(GTK_UPDATE_ICON_CACHE, gtk-update-icon-cache, no)
       if test x$GTK_UPDATE_ICON_CACHE = xno; then
         REBUILD_PNGS=#
       fi],

      [test "x$cross_compiling" = xyes],
      [# If no GTK+2 dependency and cross compiling, we need to find a host gdk-pixbuf.
       # pkg.m4 blocks all variable starting with PKG, so allow this one
       m4_pattern_allow([PKG_CONFIG_FOR_BUILD])

       AS_IF([test x$PKG_CONFIG_FOR_BUILD = x],
             [AC_MSG_ERROR([You must define PKG_CONFIG_FOR_BUILD when cross compiling])])

       AC_MSG_CHECKING([for native gdk-pixbuf])
       AS_IF([AC_RUN_LOG([$PKG_CONFIG_FOR_BUILD --exists --print-errors gdk-pixbuf-2.0])],
             [AC_MSG_RESULT([yes])],
             [AC_MSG_ERROR([native gdk-pixbuf not found])])

       NATIVE_GDKPIXBUF_CFLAGS=`$PKG_CONFIG_FOR_BUILD --cflags gdk-pixbuf-2.0`
       NATIVE_GDKPIXBUF_LIBS=`$PKG_CONFIG_FOR_BUILD --libs gdk-pixbuf-2.0`
       AC_SUBST(NATIVE_GDKPIXBUF_CFLAGS)
       AC_SUBST(NATIVE_GDKPIXBUF_LIBS)]
)
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AM_CONDITIONAL(USE_EXTERNAL_ICON_CACHE, [test "x$enable_gtk2_dependency" = xyes])
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AC_PATH_PROG(GDK_PIXBUF_CSOURCE, gdk-pixbuf-csource, no)

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if test ! -f $srcdir/gtk/gtkbuiltincache.h &&
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   test "x$REBUILD_PNGS" = "x#" ; then
     AC_MSG_ERROR([
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*** gtkbuiltincache.h is not in the tree, and cannot be built
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*** because you don't have libpng, or (when cross-compiling) you
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*** don't have a prebuilt gtk-update-icon-cache on the build system.])
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fi

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########################################
# Windowing system checks
########################################
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# GTK+ uses some X calls, so needs to link against X directly
GTK_DEP_PACKAGES_FOR_X=
GTK_DEP_LIBS_FOR_X=
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X_EXTENSIONS=
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if test "x$enable_x11_backend" = xyes; then
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  X_PACKAGES=fontconfig

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  #
  # We use fontconfig very peripherally when decoding the default
  # settings.
  #
  if $PKG_CONFIG --exists fontconfig; then : ; else
    AC_MSG_ERROR([
*** fontconfig (http://www.fontconfig.org) is required by the X11 backend.])
  fi

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  #
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  # Check for basic X packages; we use pkg-config if available
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  #
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  if $PKG_CONFIG --exists x11 xext; then
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    have_base_x_pc=true
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    X_PACKAGES="$X_PACKAGES x11 xext"
    x_libs="`$PKG_CONFIG --libs x11 xext`"
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    X_CFLAGS="`$PKG_CONFIG --cflags x11 xext`"
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    # Strip out any .la files that pkg-config might give us (this happens
    # with -uninstalled.pc files)
    x_libs_for_checks=
    for I in $x_libs ; do
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      case $I in
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        *.la) ;;
        *) x_libs_for_checks="$x_libs_for_checks $I" ;;
      esac
    done
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    GTK_PACKAGES_FOR_X="x11"
  else
    have_base_x_pc=false
    AC_PATH_XTRA
    if test x$no_x = xyes ; then
      AC_MSG_ERROR([X development libraries not found])
    fi
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    x_cflags="$X_CFLAGS"
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    x_libs_for_checks="$X_LIBS -lXext -lX11 $X_EXTRA_LIBS"
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    GTK_DEP_LIBS_FOR_X="$X_LIBS -lX11 $X_EXTRA_LIBS"
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  fi

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  # Extra libraries found during checks (-lXinerama, etc), not from pkg-config.
  x_extra_libs=
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  gtk_save_cppflags="$CPPFLAGS"
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  CPPFLAGS="$CPPFLAGS $X_CFLAGS"
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  gtk_save_LIBS=$LIBS
  LIBS="$x_libs_for_checks $LIBS"
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  # Sanity check for the X11 and Xext libraries. While everything we need from
  # Xext is optional, the chances a system has *none* of these things is so
  # small that we just unconditionally require it.
  AC_CHECK_FUNC(XOpenDisplay, :,
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                AC_MSG_ERROR([*** libX11 and libXext not found. Check 'config.log' for more details.]))
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  AC_CHECK_FUNC(XextFindDisplay, :,
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                AC_MSG_ERROR([*** libX11 and libXext not found. Check 'config.log' for more details.]))
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  # Check for xReply

  AC_MSG_CHECKING([if <X11/extensions/XIproto.h> is needed for xReply])
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  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <X11/Xlibint.h>]],
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                                     [[xReply *rep = NULL;
                                       rep = rep;]])],
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                    [AC_MSG_RESULT([no])],
                    [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <X11/extensions/XIproto.h>
                                                          #include <X11/Xlibint.h>]],
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                                                        [[xReply *rep = NULL;
                                                          rep = rep;]])],
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                                       [AC_MSG_RESULT([yes])
                                        AC_DEFINE([NEED_XIPROTO_H_FOR_XREPLY], [1],
                                                  [Define if <X11/extensions/XIproto.h> needed for xReply])],
                                       [AC_MSG_RESULT([unknown])
                                        AC_MSG_ERROR([xReply type unavailable. X11 is too old])])])
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  # Check for XKB support.

  if test "x$enable_xkb" = "xyes"; then
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        AC_CHECK_FUNC(XkbQueryExtension,
                      X_EXTENSIONS="$X_EXTENSIONS XKB"
                      AC_DEFINE(HAVE_XKB, 1, [Define to use XKB extension]),
                      AC_MSG_ERROR([*** XKB extension not found. Check 'config.log' for more details.]))
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  elif test "x$enable_xkb" = "xmaybe"; then
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        AC_CHECK_FUNC(XkbQueryExtension,
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                      X_EXTENSIONS="$X_EXTENSIONS XKB"
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                      AC_DEFINE(HAVE_XKB, 1, [Define to use XKB extension]))
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  else
        AC_MSG_WARN(XKB support explicitly disabled)
  fi

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  # Check for shaped window extension
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  AC_CHECK_FUNC(XShapeCombineMask, :,
     [AC_MSG_ERROR([Shape extension not found, check your development headers])])
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  # X SYNC check
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  gtk_save_CFLAGS="$CFLAGS"
  CFLAGS="$CFLAGS $x_cflags"
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  AC_CHECK_FUNC(XSyncQueryExtension,
      [AC_CHECK_HEADER(X11/extensions/sync.h,
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	  AC_DEFINE(HAVE_XSYNC, 1, [Have the SYNC extension library]),
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	  :, [#include <X11/Xlib.h>])])
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  CFLAGS="$gtk_save_CFLAGS"

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  if test "x$enable_xinerama" != "xno"; then
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    # Check for Xinerama extension (Solaris impl or Xfree impl)
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    have_xfree_xinerama=false
    have_solaris_xinerama=false

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    gtk_save_cppflags="$CPPFLAGS"
    CPPFLAGS="$CPPFLAGS $x_cflags"
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    # Check for XFree
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    AC_MSG_CHECKING(for Xinerama packages)
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    if $PKG_CONFIG --exists xinerama ; then
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       AC_MSG_RESULT(yes)
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       have_xfree_xinerama=true
       X_PACKAGES="$X_PACKAGES xinerama"
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    else
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       AC_MSG_RESULT(no)
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       AC_CHECK_LIB(Xinerama, XineramaQueryExtension,
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	   [AC_CHECK_HEADER(X11/extensions/Xinerama.h,
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	   [GTK_ADD_LIB(x_extra_libs,Xinerama)
	   have_xfree_xinerama=true], :,
           [#include <X11/Xlib.h>])])
    fi

    if $have_xfree_xinerama ; then
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      X_EXTENSIONS="$X_EXTENSIONS Xinerama"
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      AC_DEFINE(HAVE_XFREE_XINERAMA, 1,
                [Define to 1 if XFree Xinerama is available])
      AC_DEFINE(HAVE_XINERAMA, 1,
                [Define to 1 is Xinerama is available])
    else
      case "$host" in
        *-*-solaris*)
            # Check for solaris
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	    have_solaris_xinerama=false
	    AC_CHECK_FUNC(XineramaGetInfo,
	        [AC_CHECK_HEADER(X11/extensions/xinerama.h,
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		    [have_solaris_xinerama=true], :,
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		    [#include <X11/Xlib.h>])])
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	    AC_MSG_CHECKING(for Xinerama support on Solaris)

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            if $have_solaris_xinerama ; then
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              X_EXTENSIONS="$X_EXTENSIONS Xinerama"
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              AC_DEFINE(HAVE_SOLARIS_XINERAMA, 1,
                        [Define to 1 if solaris xinerama is available])
	      AC_DEFINE(HAVE_XINERAMA, 1,
                        [Define to 1 if xinerama is available])
              AC_MSG_RESULT(yes)
            else
              AC_MSG_RESULT(no)
            fi
            ;;
        *)
            ;;
      esac
    fi
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  fi
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  if test "x$enable_xinerama" = "xyes" ; then
    if test "x$have_xfree_xinerama" != "xtrue" -a "x$have_solaris_xinerama" != "xtrue" ; then
      AC_MSG_ERROR([*** Xinerama extension not found. Check 'config.log' for more details.])
    fi
  fi
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  # Check for XGetEventData for GenericEvents
  AC_CHECK_FUNC(XGetEventData,
                AC_DEFINE(HAVE_XGENERICEVENTS, 1, [Have XGenericEvent]))

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  # set up things for XInput
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  if $PKG_CONFIG --exists "xi" ; then
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    X_PACKAGES="$X_PACKAGES xi"
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    GTK_PACKAGES_FOR_X="$GTK_PACKAGES_FOR_X xi"
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    AC_CHECK_HEADER(X11/extensions/XInput2.h,
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                    have_xinput2=yes