path: root/unix/configure.in

#! /bin/bash -norc
dnl	This file is an input file used by the GNU "autoconf" program to
dnl	generate the file "configure", which is run during Tk installation
dnl	to configure the system for the local environment.

AC_INIT([tk],[8.5])
AC_PREREQ(2.59)

dnl This is only used when included from macosx/configure.ac
m4_ifdef([SC_USE_CONFIG_HEADERS], [
    AC_CONFIG_HEADERS([tkConfig.h:../unix/tkConfig.h.in])
    AC_CONFIG_COMMANDS_PRE([DEFS="-DHAVE_TK_CONFIG_H  -imacros tkConfig.h"])
    AH_TOP([
    #ifndef _TKCONFIG
    #define _TKCONFIG])
    AH_BOTTOM([
    /* Undef unused package specific autoheader defines so that we can
     * include both tclConfig.h and tkConfig.h at the same time: */
    /* override */ #undef PACKAGE_NAME
    /* override */ #undef PACKAGE_STRING
    /* override */ #undef PACKAGE_TARNAME
    #endif /* _TKCONFIG */])
])

TK_VERSION=8.5
TK_MAJOR_VERSION=8
TK_MINOR_VERSION=5
TK_PATCH_LEVEL=".14"
VERSION=${TK_VERSION}
LOCALES="cs da de el en en_gb eo es fr hu it nl pl pt ru sv"

#--------------------------------------------------------------------
# Find and load the tclConfig.sh file
#--------------------------------------------------------------------

SC_PATH_TCLCONFIG
SC_LOAD_TCLCONFIG

SC_PROG_TCLSH
SC_BUILD_TCLSH

if test "${TCL_MAJOR_VERSION}" != "${TK_MAJOR_VERSION}"; then
    AC_MSG_ERROR([${TCL_BIN_DIR}/tclConfig.sh is for Tcl ${TCL_VERSION}.
Tk ${TK_VERSION}${TK_PATCH_LEVEL} needs Tcl ${TK_VERSION}.
Use --with-tcl= option to indicate location of tclConfig.sh file for Tcl ${TK_VERSION}.])
fi
if test "${TCL_MINOR_VERSION}" -lt "${TK_MINOR_VERSION}"; then
    AC_MSG_ERROR([${TCL_BIN_DIR}/tclConfig.sh is for Tcl ${TCL_VERSION}.
Tk ${TK_VERSION}${TK_PATCH_LEVEL} needs Tcl ${TK_VERSION}.
Use --with-tcl= option to indicate location of tclConfig.sh file for Tcl ${TK_VERSION}.])
fi

#------------------------------------------------------------------------
# Handle the --prefix=... option
#------------------------------------------------------------------------

if test "${prefix}" = "NONE"; then
    prefix="$TCL_PREFIX"
fi
if test "${exec_prefix}" = "NONE"; then
    exec_prefix=$prefix
fi
# Make sure srcdir is fully qualified!
srcdir="`cd "$srcdir" ; pwd`"
TK_SRC_DIR="`cd "$srcdir"/..; pwd`"

#------------------------------------------------------------------------
# Compress and/or soft link the manpages?
#------------------------------------------------------------------------

SC_CONFIG_MANPAGES

#------------------------------------------------------------------------
# Standard compiler checks
#------------------------------------------------------------------------

# If the user did not set CFLAGS, set it now to keep
# the AC_PROG_CC macro from adding "-g -O2".
if test "${CFLAGS+set}" != "set" ; then
    CFLAGS=""
fi

AC_PROG_CC

# limits header checks must come early to prevent
# an autoconf bug that throws errors on configure
AC_CHECK_HEADER(limits.h,
    [AC_DEFINE(HAVE_LIMITS_H, 1, [Do we have <limits.h>?])],
    [AC_DEFINE(NO_LIMITS_H, 1, [Do we have <limits.h>?])])

#--------------------------------------------------------------------
# Supply a substitute for stdlib.h if it doesn't define strtol,
# strtoul, or strtod (which it doesn't in some versions of SunOS).
#--------------------------------------------------------------------

AC_CHECK_HEADER(stdlib.h, tk_ok=1, tk_ok=0)
AC_EGREP_HEADER(strtol, stdlib.h, , tk_ok=0)
AC_EGREP_HEADER(strtoul, stdlib.h, , tk_ok=0)
AC_EGREP_HEADER(strtod, stdlib.h, , tk_ok=0)
if test $tk_ok = 0; then
    AC_DEFINE(NO_STDLIB_H, 1, [Do we have <stdlib.h>?])
fi

#------------------------------------------------------------------------
# If we're using GCC, see if the compiler understands -pipe.  If so, use it.
# It makes compiling go faster.  (This is only a performance feature.)
#------------------------------------------------------------------------

if test -z "$no_pipe" && test -n "$GCC"; then
    AC_CACHE_CHECK([if the compiler understands -pipe],
	tcl_cv_cc_pipe, [
	hold_cflags=$CFLAGS; CFLAGS="$CFLAGS -pipe"
	AC_TRY_COMPILE(,, tcl_cv_cc_pipe=yes, tcl_cv_cc_pipe=no)
	CFLAGS=$hold_cflags])
    if test $tcl_cv_cc_pipe = yes; then
	CFLAGS="$CFLAGS -pipe"
    fi
fi

#------------------------------------------------------------------------
# Threads support - this auto-enables if Tcl was compiled threaded
#------------------------------------------------------------------------

SC_ENABLE_THREADS

# Add the threads support libraries
LIBS="$LIBS$THREADS_LIBS"

SC_ENABLE_SHARED

#--------------------------------------------------------------------
# The statements below define a collection of compile flags.  This
# macro depends on the value of SHARED_BUILD, and should be called
# after SC_ENABLE_SHARED checks the configure switches.
#--------------------------------------------------------------------

SC_CONFIG_CFLAGS

SC_ENABLE_SYMBOLS

#--------------------------------------------------------------------
#	Detect what compiler flags to set for 64-bit support.
#--------------------------------------------------------------------

SC_TCL_EARLY_FLAGS

SC_TCL_64BIT_FLAGS

#--------------------------------------------------------------------
#	Check endianness because we can optimize some operations
#--------------------------------------------------------------------

AC_C_BIGENDIAN

#------------------------------------------------------------------------
# If Tcl and Tk are installed in different places, adjust the library
# search path to reflect this.
#------------------------------------------------------------------------

LIB_RUNTIME_DIR='${LIB_RUNTIME_DIR}'

if test "$TCL_EXEC_PREFIX" != "$exec_prefix"; then
    LIB_RUNTIME_DIR="${LIB_RUNTIME_DIR}:${TCL_EXEC_PREFIX}/lib"
fi

if test "$TCL_PREFIX" != "$prefix"; then
    AC_MSG_WARN([
        Different --prefix selected for Tk and Tcl!
        [[package require Tk]] may not work correctly in tclsh.])
fi

#--------------------------------------------------------------------
#	Include sys/select.h if it exists and if it supplies things
#	that appear to be useful and aren't already in sys/types.h.
#	This appears to be true only on the RS/6000 under AIX.  Some
#	systems like OSF/1 have a sys/select.h that's of no use, and
#	other systems like SCO UNIX have a sys/select.h that's
#	pernicious.  If "fd_set" isn't defined anywhere then set a
#	special flag.
#--------------------------------------------------------------------

AC_CACHE_CHECK([for fd_set in sys/types], tcl_cv_type_fd_set, [
    AC_TRY_COMPILE([#include <sys/types.h>],[fd_set readMask, writeMask;],
	tcl_cv_type_fd_set=yes, tcl_cv_type_fd_set=no)])
tk_ok=$tcl_cv_type_fd_set
if test $tk_ok = no; then
    AC_CACHE_CHECK([for fd_mask in sys/select], tcl_cv_grep_fd_mask, [
	AC_EGREP_HEADER(fd_mask, sys/select.h,
	     tcl_cv_grep_fd_mask=present, tcl_cv_grep_fd_mask=missing)])
    if test $tcl_cv_grep_fd_mask = present; then
	AC_DEFINE(HAVE_SYS_SELECT_H, 1, [Should we include <sys/select.h>?])
	tk_ok=yes
    fi
fi
if test $tk_ok = no; then
    AC_DEFINE(NO_FD_SET, 1, [Do we have fd_set?])
fi

#------------------------------------------------------------------------------
#       Find out all about time handling differences.
#------------------------------------------------------------------------------

AC_CHECK_HEADERS(sys/time.h)
AC_HEADER_TIME

#--------------------------------------------------------------------
#	Under Solaris 2.4, strtod returns the wrong value for the
#	terminating character under some conditions.  Check for this
#	and if the problem exists use a substitute procedure
#	"fixstrtod" (provided by Tcl) that corrects the error.
#--------------------------------------------------------------------

SC_BUGGY_STRTOD

#--------------------------------------------------------------------
#	Check for various typedefs and provide substitutes if
#	they don't exist.
#--------------------------------------------------------------------

AC_TYPE_MODE_T
AC_TYPE_PID_T
AC_TYPE_SIZE_T
AC_TYPE_UID_T

AC_CHECK_TYPE([intptr_t], [
    AC_DEFINE([HAVE_INTPTR_T], 1, [Do we have the intptr_t type?])], [
    AC_CACHE_CHECK([for pointer-size signed integer type], tcl_cv_intptr_t, [
    for tcl_cv_intptr_t in "int" "long" "long long" none; do
	if test "$tcl_cv_intptr_t" != none; then
	    AC_COMPILE_IFELSE([AC_LANG_BOOL_COMPILE_TRY([AC_INCLUDES_DEFAULT],
		    [[sizeof (void *) <= sizeof ($tcl_cv_intptr_t)]])],
		[tcl_ok=yes], [tcl_ok=no])
	    test "$tcl_ok" = yes && break; fi
    done])
    if test "$tcl_cv_intptr_t" != none; then
	AC_DEFINE_UNQUOTED([intptr_t], [$tcl_cv_intptr_t], [Signed integer
	   type wide enough to hold a pointer.])
    fi
])
AC_CHECK_TYPE([uintptr_t], [
    AC_DEFINE([HAVE_UINTPTR_T], 1, [Do we have the uintptr_t type?])], [
    AC_CACHE_CHECK([for pointer-size unsigned integer type], tcl_cv_uintptr_t, [
    for tcl_cv_uintptr_t in "unsigned int" "unsigned long" "unsigned long long" \
	    none; do
	if test "$tcl_cv_uintptr_t" != none; then
	    AC_COMPILE_IFELSE([AC_LANG_BOOL_COMPILE_TRY([AC_INCLUDES_DEFAULT],
		    [[sizeof (void *) <= sizeof ($tcl_cv_uintptr_t)]])],
		[tcl_ok=yes], [tcl_ok=no])
	    test "$tcl_ok" = yes && break; fi
    done])
    if test "$tcl_cv_uintptr_t" != none; then
	AC_DEFINE_UNQUOTED([uintptr_t], [$tcl_cv_uintptr_t], [Unsigned integer
	   type wide enough to hold a pointer.])
    fi
])

#-------------------------------------------
#     In OS/390 struct pwd has no pw_gecos field
#-------------------------------------------

AC_CACHE_CHECK([pw_gecos in struct pwd], tcl_cv_pwd_pw_gecos, [
    AC_TRY_COMPILE([#include <pwd.h>],
	    [struct passwd pwd; pwd.pw_gecos;],
	    tcl_cv_pwd_pw_gecos=yes, tcl_cv_pwd_pw_gecos=no)])
if test $tcl_cv_pwd_pw_gecos = yes; then
    AC_DEFINE(HAVE_PW_GECOS, 1, [Does struct password have a pw_gecos field?])
fi

#--------------------------------------------------------------------
#	On Mac OS X, we can build either with X11 or with Aqua
#--------------------------------------------------------------------

if test "`uname -s`" = "Darwin" ; then
    AC_MSG_CHECKING([whether to use Aqua])
    AC_ARG_ENABLE(aqua,
	AC_HELP_STRING([--enable-aqua],
	    [use Aqua windowingsystem on Mac OS X (default: off)]),
	[tk_aqua=$enableval], [tk_aqua=no])
    if test $tk_aqua = yes; then
	if test $tcl_corefoundation = no; then
	    AC_MSG_WARN([Aqua can only be used when CoreFoundation is available])
	    tk_aqua=no
	fi
	if test ! -d /System/Library/Frameworks/Cocoa.framework; then
	    AC_MSG_WARN([Aqua can only be used when Cocoa is available])
	    tk_aqua=no
	fi
	if test "`uname -r | awk -F. '{print [$]1}'`" -lt 9; then
	    AC_MSG_WARN([Aqua requires Mac OS X 10.5 or later])
	    tk_aqua=no
	fi
    fi
    AC_MSG_RESULT([$tk_aqua])
    if test "$fat_32_64" = yes; then
	if test $tk_aqua = no; then
	    AC_CACHE_CHECK([for 64-bit X11], tcl_cv_lib_x11_64, [
		for v in CFLAGS CPPFLAGS LDFLAGS; do
		    eval 'hold_'$v'="$'$v'";'$v'="`echo "$'$v' "|sed -e "s/-arch ppc / /g" -e "s/-arch i386 / /g"`"'
		done
		CPPFLAGS="$CPPFLAGS -I/usr/X11R6/include"
		LDFLAGS="$LDFLAGS -L/usr/X11R6/lib -lX11"
		AC_TRY_LINK([#include <X11/Xlib.h>], [XrmInitialize();],
		    tcl_cv_lib_x11_64=yes, tcl_cv_lib_x11_64=no)
		for v in CFLAGS CPPFLAGS LDFLAGS; do
		    eval $v'="$hold_'$v'"'
		done])
	fi
	# remove 64-bit arch flags from CFLAGS et al. for combined 32 & 64 bit
	# fat builds if configuration does not support 64-bit.
	if test "$tcl_cv_lib_x11_64" = no; then
	    AC_MSG_NOTICE([Removing 64-bit architectures from compiler & linker flags])
	    for v in CFLAGS CPPFLAGS LDFLAGS; do
		eval $v'="`echo "$'$v' "|sed -e "s/-arch ppc64 / /g" -e "s/-arch x86_64 / /g"`"'
	    done
	fi
    fi
    if test $tk_aqua = no; then
	# check if weak linking whole libraries is possible.
	AC_CACHE_CHECK([if ld accepts -weak-l flag], tcl_cv_ld_weak_l, [
	    hold_ldflags=$LDFLAGS
	    LDFLAGS="$LDFLAGS -Wl,-weak-lm"
	    AC_TRY_LINK([#include <math.h>], [double f = sin(1.0);],
		tcl_cv_ld_weak_l=yes, tcl_cv_ld_weak_l=no)
	    LDFLAGS=$hold_ldflags])
    fi
    AC_CHECK_HEADERS(AvailabilityMacros.h)
    if test "$ac_cv_header_AvailabilityMacros_h" = yes; then
	AC_CACHE_CHECK([if weak import is available], tcl_cv_cc_weak_import, [
	    hold_cflags=$CFLAGS; CFLAGS="$CFLAGS -Werror"
	    AC_TRY_LINK([
		    #ifdef __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__
		    #if __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 1020
		    #error __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 1020
		    #endif
		    #elif MAC_OS_X_VERSION_MIN_REQUIRED < 1020
		    #error MAC_OS_X_VERSION_MIN_REQUIRED < 1020
		    #endif
		    int rand(void) __attribute__((weak_import));
		], [rand();],
		tcl_cv_cc_weak_import=yes, tcl_cv_cc_weak_import=no)
	    CFLAGS=$hold_cflags])
	if test $tcl_cv_cc_weak_import = yes; then
	    AC_DEFINE(HAVE_WEAK_IMPORT, 1, [Is weak import available?])
	fi
	AC_CACHE_CHECK([if Darwin SUSv3 extensions are available],
	    tcl_cv_cc_darwin_c_source, [
	    hold_cflags=$CFLAGS; CFLAGS="$CFLAGS -Werror"
	    AC_TRY_COMPILE([
		    #ifdef __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__
		    #if __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 1050
		    #error __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 1050
		    #endif
		    #elif MAC_OS_X_VERSION_MIN_REQUIRED < 1050
		    #error MAC_OS_X_VERSION_MIN_REQUIRED < 1050
		    #endif
		    #define _DARWIN_C_SOURCE 1
		    #include <sys/cdefs.h>
		],,tcl_cv_cc_darwin_c_source=yes, tcl_cv_cc_darwin_c_source=no)
	    CFLAGS=$hold_cflags])
	if test $tcl_cv_cc_darwin_c_source = yes; then
	    AC_DEFINE(_DARWIN_C_SOURCE, 1,
		    [Are Darwin SUSv3 extensions available?])
	fi
    fi
else
    tk_aqua=no
fi

if test $tk_aqua = yes; then
    AC_DEFINE(MAC_OSX_TK, 1, [Are we building TkAqua?])
    LIBS="$LIBS -framework Cocoa -framework Carbon -framework IOKit"
    EXTRA_CC_SWITCHES='-std=gnu99 -x objective-c -fobjc-gc'
    TK_WINDOWINGSYSTEM=AQUA
    if test -n "${enable_symbols}" -a "${enable_symbols}" != no; then
        AC_DEFINE(TK_MAC_DEBUG, 1, [Are TkAqua debug messages enabled?])
    fi
else
    #--------------------------------------------------------------------
    #	Locate the X11 header files and the X11 library archive.  Try
    #	the ac_path_x macro first, but if it doesn't find the X stuff
    #	(e.g. because there's no xmkmf program) then check through
    #	a list of possible directories.  Under some conditions the
    #	autoconf macro will return an include directory that contains
    #	no include files, so double-check its result just to be safe.
    #--------------------------------------------------------------------

    SC_PATH_X
    TK_WINDOWINGSYSTEM=X11
fi

#--------------------------------------------------------------------
#	Various manipulations on the search path used at runtime to
#	find shared libraries:
#	1. If the X library binaries are in a non-standard directory,
#	   add the X library location into that search path.
#	2. On systems such as AIX and Ultrix that use "-L" as the
#	   search path option, colons cannot be used to separate
#	   directories from each other. Change colons to " -L".
#	3. Create two sets of search flags, one for use in cc lines
#	   and the other for when the linker is invoked directly.  In
#	   the second case, '-Wl,' must be stripped off and commas must
#	   be replaced by spaces.
#--------------------------------------------------------------------

if test "x${x_libraries}" != "x"; then
    LIB_RUNTIME_DIR="${LIB_RUNTIME_DIR}:${x_libraries}"
fi
if test "${TCL_LD_SEARCH_FLAGS}" = '-L${LIB_RUNTIME_DIR}'; then
    LIB_RUNTIME_DIR=`echo ${LIB_RUNTIME_DIR} |sed -e 's/:/ -L/g'`
fi

#--------------------------------------------------------------------
#	Check for the existence of various libraries.  The order here
#	is important, so that then end up in the right order in the
#	command line generated by make.  The -lsocket and -lnsl libraries
#	require a couple of special tricks:
#	1. Use "connect" and "accept" to check for -lsocket, and
#	   "gethostbyname" to check for -lnsl.
#	2. Use each function name only once:  can't redo a check because
#	   autoconf caches the results of the last check and won't redo it.
#	3. Use -lnsl and -lsocket only if they supply procedures that
#	   aren't already present in the normal libraries.  This is because
#	   IRIX 5.2 has libraries, but they aren't needed and they're
#	   bogus:  they goof up name resolution if used.
#	4. On some SVR4 systems, can't use -lsocket without -lnsl too.
#	   To get around this problem, check for both libraries together
#	   if -lsocket doesn't work by itself.
#--------------------------------------------------------------------

if test $tk_aqua = no; then
    AC_CHECK_LIB(Xbsd, main, [LIBS="$LIBS -lXbsd"])
fi

#--------------------------------------------------------------------
# One more check related to the X libraries.  The standard releases
# of Ultrix don't support the "xauth" mechanism, so send won't work
# unless TK_NO_SECURITY is defined.  However, there are usually copies
# of the MIT X server available as well, which do support xauth.
# Check for the MIT stuff and use it if it exists.
#
# Note: can't use ac_check_lib macro (at least, not in Autoconf 2.1)
# because it can't deal with the "-" in the library name.
#--------------------------------------------------------------------

if test -d /usr/include/mit -a $tk_aqua = no; then
    AC_MSG_CHECKING([MIT X libraries])
    tk_oldCFlags=$CFLAGS
    CFLAGS="$CFLAGS -I/usr/include/mit"
    tk_oldLibs=$LIBS
    LIBS="$LIBS -lX11-mit"
    AC_TRY_LINK([
	#include <X11/Xlib.h>
    ], [
	XOpenDisplay(0);
    ], [
	AC_MSG_RESULT([yes])
	XLIBSW="-lX11-mit"
	XINCLUDES="-I/usr/include/mit"
    ], AC_MSG_RESULT([no]))
    CFLAGS=$tk_oldCFlags
    LIBS=$tk_oldLibs
fi

#--------------------------------------------------------------------
#	Check for freetype / fontconfig / Xft support.
#--------------------------------------------------------------------

if test $tk_aqua = no; then
    AC_MSG_CHECKING([whether to use xft])
    AC_ARG_ENABLE(xft,
	AC_HELP_STRING([--enable-xft],
	    [use freetype/fontconfig/xft (default: on)]),
	[enable_xft=$enableval], [enable_xft="default"])
    XFT_CFLAGS=""
    XFT_LIBS=""
    if test "$enable_xft" = "no" ; then
	AC_MSG_RESULT([$enable_xft])
    else
	found_xft="yes"
	dnl make sure package configurator (xft-config or pkg-config
	dnl says that xft is present.
	XFT_CFLAGS=`xft-config --cflags 2>/dev/null` || found_xft="no"
	XFT_LIBS=`xft-config --libs 2>/dev/null` || found_xft="no"
	if test "$found_xft" = "no" ; then
	    found_xft=yes
	    XFT_CFLAGS=`pkg-config --cflags xft 2>/dev/null` || found_xft="no"
	    XFT_LIBS=`pkg-config --libs xft 2>/dev/null` || found_xft="no"
	fi
	AC_MSG_RESULT([$found_xft])
	dnl make sure that compiling against Xft header file doesn't bomb
	if test "$found_xft" = "yes" ; then
	    tk_oldCFlags=$CFLAGS
	    CFLAGS="$CFLAGS $XINCLUDES $XFT_CFLAGS"
	    tk_oldLibs=$LIBS
	    LIBS="$tk_oldLIBS $XFT_LIBS $XLIBSW"
	    AC_CHECK_HEADER(X11/Xft/Xft.h, [], [
		found_xft=no
	    ],[#include <X11/Xlib.h>])
	    CFLAGS=$tk_oldCFlags
	    LIBS=$tk_oldLibs
	fi
	dnl make sure that linking against Xft libraries finds freetype
	if test "$found_xft" = "yes" ; then
	    tk_oldCFlags=$CFLAGS
	    CFLAGS="$CFLAGS $XINCLUDES $XFT_CFLAGS"
	    tk_oldLibs=$LIBS
	    LIBS="$tk_oldLIBS $XFT_LIBS $XLIBSW"
	    AC_CHECK_LIB(Xft, XftFontOpen, [], [
		found_xft=no
	    ])
	    CFLAGS=$tk_oldCFlags
	    LIBS=$tk_oldLibs
	fi
	dnl print a warning if xft is unusable and was specifically requested
	if test "$found_xft" = "no" ; then
	    if test "$enable_xft" = "yes" ; then
		AC_MSG_WARN([Can't find xft configuration, or xft is unusable])
	    fi
	    enable_xft=no
	    XFT_CFLAGS=""
	    XFT_LIBS=""
	else
            enable_xft=yes
	fi
    fi
    if test $enable_xft = "yes" ; then
	UNIX_FONT_OBJS=tkUnixRFont.o
	AC_DEFINE(HAVE_XFT, 1, [Have we turned on XFT (antialiased fonts)?])
    else
	UNIX_FONT_OBJS=tkUnixFont.o
    fi
    AC_SUBST(XFT_CFLAGS)
    AC_SUBST(XFT_LIBS)
    AC_SUBST(UNIX_FONT_OBJS)
fi

#--------------------------------------------------------------------
#	Check for XkbKeycodeToKeysym.
#--------------------------------------------------------------------

if test $tk_aqua = no; then
    tk_oldCFlags=$CFLAGS
    tk_oldLibs=$LIBS
    CFLAGS="$CFLAGS $XINCLUDES"
    LIBS="$LIBS $XLIBSW"
    AC_CHECK_HEADER(X11/XKBlib.h, [
	xkblib_header_found=yes
    ], [
	xkblib_header_found=no
    ], [#include <X11/Xlib.h>])
    if test $xkblib_header_found = "yes" ; then
	AC_CHECK_LIB(X11, XkbKeycodeToKeysym, [
	    xkbkeycodetokeysym_found=yes
	], [
	    xkbkeycodetokeysym_found=no
	])
    else
	xkbkeycodetokeysym_found=no
    fi
    if test $xkbkeycodetokeysym_found = "yes" ; then
	AC_DEFINE(HAVE_XKBKEYCODETOKEYSYM, 1, [Do we have XkbKeycodeToKeysym?])
    fi
    CFLAGS=$tk_oldCFlags
    LIBS=$tk_oldLibs
fi

#--------------------------------------------------------------------
# XXX Do this last.
# It might modify XLIBSW which could affect other tests.
#
# Check whether the header and library for the XScreenSaver
# extension are available, and set HAVE_XSS if so.
# XScreenSaver is needed for Tk_GetUserInactiveTime().
#--------------------------------------------------------------------

if test $tk_aqua = no; then
    tk_oldCFlags=$CFLAGS
    CFLAGS="$CFLAGS $XINCLUDES"
    tk_oldLibs=$LIBS
    LIBS="$tk_oldLibs $XLIBSW"
    xss_header_found=no
    xss_lib_found=no
    AC_MSG_CHECKING([whether to try to use XScreenSaver])
    AC_ARG_ENABLE(xss,
	AC_HELP_STRING([--enable-xss],
	    [use XScreenSaver for activity timer (default: on)]),
	[enable_xss=$enableval], [enable_xss=yes])
    if test "$enable_xss" = "no" ; then
	AC_MSG_RESULT([$enable_xss])
    else
	AC_MSG_RESULT([$enable_xss])
	AC_CHECK_HEADER(X11/extensions/scrnsaver.h, [
	    xss_header_found=yes
	],,[#include <X11/Xlib.h>])
	AC_CHECK_FUNC(XScreenSaverQueryInfo,,[
	    AC_CHECK_LIB(Xext, XScreenSaverQueryInfo, [
		XLIBSW="$XLIBSW -lXext"
		xss_lib_found=yes
	    ], [
		AC_CHECK_LIB(Xss, XScreenSaverQueryInfo, [
		    if test "$tcl_cv_ld_weak_l" = yes; then
			# On Darwin, weak link libXss if possible,
			# as it is only available on Tiger or later.
			XLIBSW="$XLIBSW -Wl,-weak-lXss -lXext"
		    else
			XLIBSW="$XLIBSW -lXss -lXext"
		    fi
		    xss_lib_found=yes
		],, -lXext)
	    ])
	])
    fi
    if test $enable_xss = yes -a $xss_lib_found = yes -a $xss_header_found = yes; then
	AC_DEFINE(HAVE_XSS, 1, [Is XScreenSaver available?])
    fi
    CFLAGS=$tk_oldCFlags
    LIBS=$tk_oldLibs
fi

#--------------------------------------------------------------------
#	Figure out whether "char" is unsigned.  If so, set a
#	#define for __CHAR_UNSIGNED__.
#--------------------------------------------------------------------

AC_C_CHAR_UNSIGNED

#--------------------------------------------------------------------
#	The statements below define a collection of symbols related to
#	building libtk as a shared library instead of a static library.
#--------------------------------------------------------------------

eval eval "TK_UNSHARED_LIB_SUFFIX=${UNSHARED_LIB_SUFFIX}"
eval eval "TK_SHARED_LIB_SUFFIX=${SHARED_LIB_SUFFIX}"
eval "TK_LIB_FILE=libtk${LIB_SUFFIX}"

# tkConfig.sh needs a version of the _LIB_SUFFIX that has been eval'ed
# since on some platforms TK_LIB_FILE contains shell escapes.

eval "TK_LIB_FILE=${TK_LIB_FILE}"

if test "${SHARED_BUILD}" = "1" -a "${SHLIB_SUFFIX}" != ""; then
    SHLIB_LD_LIBS="${SHLIB_LD_LIBS} \${TCL_STUB_LIB_SPEC}"
    TCL_STUB_FLAGS="-DUSE_TCL_STUBS"
fi

TK_LIBRARY='$(prefix)/lib/tk$(VERSION)'
PRIVATE_INCLUDE_DIR='$(includedir)'
HTML_DIR='$(DISTDIR)/html'
TK_PKG_DIR='tk$(VERSION)'
TK_RSRC_FILE='tk$(VERSION).rsrc'
WISH_RSRC_FILE='wish$(VERSION).rsrc'

# Note:  in the following variable, it's important to use the absolute
# path name of the Tcl directory rather than "..":  this is because
# AIX remembers this path and will attempt to use it at run-time to look
# up the Tcl library.

if test "`uname -s`" = "Darwin" ; then
    SC_ENABLE_FRAMEWORK
    TK_SHLIB_LD_EXTRAS="-compatibility_version ${TK_VERSION} -current_version ${TK_VERSION}`echo ${TK_PATCH_LEVEL} | awk ['{match($0, "\\\.[0-9]+"); print substr($0,RSTART,RLENGTH)}']`"
    TK_SHLIB_LD_EXTRAS="${TK_SHLIB_LD_EXTRAS}"' -install_name "${DYLIB_INSTALL_DIR}/${TK_LIB_FILE}" -unexported_symbols_list $$(f=$(TK_LIB_FILE).E && nm -gp tkMacOSX*.o 2>/dev/null | awk "/^[[0-9a-f]]+ . \.objc/ {print \$$3}" > $$f && nm -gjp "$(TCL_BIN_DIR)"/$(TCL_STUB_LIB_FILE) | grep ^_[[^_]] >> $$f && echo $$f)'
    echo "$LDFLAGS " | grep -q -- '-prebind ' && TK_SHLIB_LD_EXTRAS="${TK_SHLIB_LD_EXTRAS}"' -seg1addr 0xb000000'
    TK_SHLIB_LD_EXTRAS="${TK_SHLIB_LD_EXTRAS}"' -sectcreate __TEXT __info_plist Tk-Info.plist'
    EXTRA_WISH_LIBS='-sectcreate __TEXT __info_plist Wish-Info.plist'
    EXTRA_APP_CC_SWITCHES="${EXTRA_APP_CC_SWITCHES}"' -mdynamic-no-pic'
    AC_CONFIG_FILES([Tk-Info.plist:../macosx/Tk-Info.plist.in Wish-Info.plist:../macosx/Wish-Info.plist.in])
    for l in ${LOCALES}; do CFBUNDLELOCALIZATIONS="${CFBUNDLELOCALIZATIONS}<string>$l</string>"; done
    TK_YEAR="`date +%Y`"
fi

if test "$FRAMEWORK_BUILD" = "1" ; then
    AC_DEFINE(TK_FRAMEWORK, 1, [Is Tk built as a framework?])
    # Construct a fake local framework structure to make linking with
    # '-framework Tk' and running of tktest work
    AC_CONFIG_COMMANDS([Tk.framework], [n=Tk &&
        f=$n.framework && v=Versions/$VERSION &&
        rm -rf $f && mkdir -p $f/$v/Resources &&
        ln -s $v/$n $v/Resources $f && ln -s ../../../$n $f/$v &&
        ln -s ../../../../$n-Info.plist $f/$v/Resources/Info.plist &&
        if test $tk_aqua = yes; then ln -s ../../../../$n.rsrc $f/$v/Resources; fi &&
        unset n f v
    ], VERSION=${TK_VERSION} && tk_aqua=${tk_aqua})
    LD_LIBRARY_PATH_VAR="DYLD_FRAMEWORK_PATH"
    if test "${libdir}" = '${exec_prefix}/lib'; then
        # override libdir default
        libdir="/Library/Frameworks"
    fi
    TK_LIB_FILE="Tk"
    TK_LIB_FLAG="-framework Tk"
    TK_BUILD_LIB_SPEC="-F`pwd | sed -e 's/ /\\\\ /g'` -framework Tk"
    WISH_BUILD_LIB_SPEC="-F`pwd | sed -e 's/ /\\\\ /g'` -framework Tk \${WISH_LIBS}"
    TK_LIB_SPEC="-F${libdir} -framework Tk"
    libdir="${libdir}/Tk.framework/Versions/\${VERSION}"
    TK_LIBRARY="${libdir}/Resources/Scripts"
    TK_PKG_DIR="Resources/Scripts"
    TK_RSRC_FILE="Tk.rsrc"
    WISH_RSRC_FILE="Wish.rsrc"
    includedir="${libdir}/Headers"
    PRIVATE_INCLUDE_DIR="${libdir}/PrivateHeaders"
    HTML_DIR="${libdir}/Resources/Documentation/Reference/Tk"
    EXTRA_INSTALL="install-private-headers html-tk"
    EXTRA_BUILD_HTML='@ln -fs contents.htm "$(HTML_INSTALL_DIR)"/TkTOC.html'
    EXTRA_INSTALL_BINARIES='@echo "Installing Info.plist to $(LIB_INSTALL_DIR)/Resources/" && mkdir -p "$(LIB_INSTALL_DIR)/Resources" && $(INSTALL_DATA) Tk-Info.plist "$(LIB_INSTALL_DIR)/Resources/Info.plist"'
    EXTRA_INSTALL_BINARIES="$EXTRA_INSTALL_BINARIES"' && echo "Installing license.terms to $(LIB_INSTALL_DIR)/Resources" && $(INSTALL_DATA) "$(TOP_DIR)/license.terms" "$(LIB_INSTALL_DIR)/Resources"'
    if test $tk_aqua = yes; then
        EXTRA_INSTALL_BINARIES="$EXTRA_INSTALL_BINARIES"' && echo "Installing Images to $(LIB_INSTALL_DIR)/Resources" && mkdir -p "$(LIB_INSTALL_DIR)/Resources" && for i in Tk.tiff Tk.icns; do $(INSTALL_DATA) "$(MAC_OSX_DIR)/$$i" "$(LIB_INSTALL_DIR)/Resources"; done'
        EXTRA_INSTALL_BINARIES="$EXTRA_INSTALL_BINARIES"' && echo "Installing wish$(VERSION) script to $(INSTALL_ROOT)/'"${bindir}"'" && mkdir -p "$(INSTALL_ROOT)/'"${bindir}"'" && printf > "$(INSTALL_ROOT)/'"${bindir}"'/wish$(VERSION)" "#!/bin/sh\n\"\$$(dirname \$$0)'"`eval d="${bindir}"; echo "$d" | sed -e 's#/[^/][^/]*#/..#g'`"'$(bindir)/Wish\" \"\$$@\"" && chmod +x "$(INSTALL_ROOT)/'"${bindir}"'/wish$(VERSION)"'
        bindir="${libdir}/Resources/Wish.app/Contents/MacOS"
        EXTRA_INSTALL_BINARIES="$EXTRA_INSTALL_BINARIES"' && echo "Installing Info.plist to $(BIN_INSTALL_DIR)/.." && $(INSTALL_DATA) Wish-Info.plist "$(BIN_INSTALL_DIR)/../Info.plist" && mv -f "$(BIN_INSTALL_DIR)/wish$(VERSION)" "$(BIN_INSTALL_DIR)/Wish"'
        EXTRA_INSTALL_BINARIES="$EXTRA_INSTALL_BINARIES"' && echo "Installing Wish.icns to $(BIN_INSTALL_DIR)/../Resources" && mkdir -p "$(BIN_INSTALL_DIR)/../Resources" && $(INSTALL_DATA) "$(MAC_OSX_DIR)/Tk.icns" "$(BIN_INSTALL_DIR)/../Resources/Wish.icns"'
        EXTRA_INSTALL_BINARIES="$EXTRA_INSTALL_BINARIES"' && echo "Installing Wish.sdef to $(BIN_INSTALL_DIR)/../Resources" && $(INSTALL_DATA) "$(MAC_OSX_DIR)/Wish.sdef" "$(BIN_INSTALL_DIR)/../Resources"'
    fi
    EXTRA_INSTALL_BINARIES="$EXTRA_INSTALL_BINARIES"' && echo "Finalizing Tk.framework" && rm -f "$(LIB_INSTALL_DIR)/../Current" && ln -s "$(VERSION)" "$(LIB_INSTALL_DIR)/../Current" && for f in "$(LIB_FILE)" tkConfig.sh Resources Headers PrivateHeaders; do rm -f "$(LIB_INSTALL_DIR)/../../$$f" && ln -s "Versions/Current/$$f" "$(LIB_INSTALL_DIR)/../.."; done && f="$(STUB_LIB_FILE)" && rm -f "$(LIB_INSTALL_DIR)/../../$$f" && ln -s "Versions/$(VERSION)/$$f" "$(LIB_INSTALL_DIR)/../.."'
    # Don't use AC_DEFINE for the following as the framework version define
    # needs to go into the Makefile even when using autoheader, so that we
    # can pick up a potential make override of VERSION. Also, don't put this
    # into CFLAGS as it should not go into tkConfig.sh
    EXTRA_CC_SWITCHES="$EXTRA_CC_SWITCHES"' -DTK_FRAMEWORK_VERSION=\"$(VERSION)\"'
else
    if test $tk_aqua = yes; then
        EXTRA_INSTALL_BINARIES='@echo "Installing Images to $(LIB_INSTALL_DIR)/" && mkdir -p "$(LIB_INSTALL_DIR)" && for i in Tk.tiff Tk.icns; do $(INSTALL_DATA) "$(MAC_OSX_DIR)/$$i" "$(LIB_INSTALL_DIR)"; done'
    fi
    # libdir must be a fully qualified path and not ${exec_prefix}/lib
    eval libdir="$libdir"
    if test "${TCL_LIB_VERSIONS_OK}" = "ok"; then
        TK_LIB_FLAG="-ltk${TK_VERSION}"
    else
        TK_LIB_FLAG="-ltk`echo ${TK_VERSION} | tr -d .`"
    fi
    TK_BUILD_LIB_SPEC="-L`pwd | sed -e 's/ /\\\\ /g'` ${TK_LIB_FLAG}"
    if test "${ac_cv_cygwin}" = "yes" -a "$SHARED_BUILD" = "1"; then
	WISH_BUILD_LIB_SPEC="-L\$(TOP_DIR)/win -ltk${TK_MAJOR_VERSION}${TK_MINOR_VERSION} \${TCL_LIB_SPEC}"
    else
	WISH_BUILD_LIB_SPEC="-L`pwd | sed -e 's/ /\\\\ /g'` ${TK_LIB_FLAG} \${WISH_LIBS}"
    fi
    TK_LIB_SPEC="-L${libdir} ${TK_LIB_FLAG}"
fi

#--------------------------------------------------------------------
#       The statements below define various symbols relating to Tk
#       stub support.
#--------------------------------------------------------------------

# Replace ${VERSION} with contents of ${TK_VERSION}
eval "TK_STUB_LIB_FILE=libtkstub${TK_UNSHARED_LIB_SUFFIX}"
eval "TK_STUB_LIB_DIR=${libdir}"

if test "${TCL_LIB_VERSIONS_OK}" = "ok"; then
    TK_STUB_LIB_FLAG="-ltkstub${TK_VERSION}"
else
    TK_STUB_LIB_FLAG="-ltkstub`echo ${TK_VERSION} | tr -d .`"
fi

TK_BUILD_STUB_LIB_SPEC="-L`pwd | sed -e 's/ /\\\\ /g'` ${TK_STUB_LIB_FLAG}"
TK_STUB_LIB_SPEC="-L${TK_STUB_LIB_DIR} ${TK_STUB_LIB_FLAG}"
TK_BUILD_STUB_LIB_PATH="`pwd`/${TK_STUB_LIB_FILE}"
TK_STUB_LIB_PATH="${TK_STUB_LIB_DIR}/${TK_STUB_LIB_FILE}"

# Install time header dir can be set via --includedir
eval "TK_INCLUDE_SPEC=\"-I${includedir}\""

#------------------------------------------------------------------------
# tkConfig.sh refers to this by a different name
#------------------------------------------------------------------------

TK_SHARED_BUILD=${SHARED_BUILD}

AC_SUBST(TK_VERSION)
AC_SUBST(TK_MAJOR_VERSION)
AC_SUBST(TK_MINOR_VERSION)
AC_SUBST(TK_PATCH_LEVEL)
AC_SUBST(TK_YEAR)

AC_SUBST(TK_LIB_FILE)
AC_SUBST(TK_LIB_FLAG)
AC_SUBST(TK_LIB_SPEC)
AC_SUBST(TK_STUB_LIB_FILE)
AC_SUBST(TK_STUB_LIB_FLAG)
AC_SUBST(TK_STUB_LIB_SPEC)
AC_SUBST(TK_STUB_LIB_PATH)
AC_SUBST(TK_INCLUDE_SPEC)
AC_SUBST(TK_BUILD_STUB_LIB_SPEC)
AC_SUBST(TK_BUILD_STUB_LIB_PATH)

AC_SUBST(TK_SRC_DIR)

AC_SUBST(TK_SHARED_BUILD)
AC_SUBST(LD_LIBRARY_PATH_VAR)

AC_SUBST(TK_BUILD_LIB_SPEC)
AC_SUBST(WISH_BUILD_LIB_SPEC)

AC_SUBST(TCL_STUB_FLAGS)
AC_SUBST(XINCLUDES)
AC_SUBST(XLIBSW)
AC_SUBST(LOCALES)

AC_SUBST(TK_WINDOWINGSYSTEM)
AC_SUBST(TK_PKG_DIR)
AC_SUBST(TK_LIBRARY)
AC_SUBST(PRIVATE_INCLUDE_DIR)
AC_SUBST(HTML_DIR)

AC_SUBST(EXTRA_CC_SWITCHES)
AC_SUBST(EXTRA_APP_CC_SWITCHES)
AC_SUBST(EXTRA_INSTALL)
AC_SUBST(EXTRA_INSTALL_BINARIES)
AC_SUBST(EXTRA_BUILD_HTML)
AC_SUBST(EXTRA_WISH_LIBS)
AC_SUBST(CFBUNDLELOCALIZATIONS)

AC_SUBST(TK_RSRC_FILE)
AC_SUBST(WISH_RSRC_FILE)
AC_SUBST(LIB_RSRC_FILE)
AC_SUBST(APP_RSRC_FILE)
AC_SUBST(REZ)
AC_SUBST(REZ_FLAGS)

AC_CONFIG_FILES([
    Makefile:../unix/Makefile.in
    tkConfig.sh:../unix/tkConfig.sh.in
])
AC_OUTPUT

dnl Local Variables:
dnl mode: autoconf
dnl End: