# tcl.m4 --
#
#	This file provides a set of autoconf macros to help TEA-enable
#	a Tcl extension.
#
# Copyright (c) 1999-2000 Ajuba Solutions.
# Copyright (c) 2002-2005 ActiveState Corporation.
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
#
# RCS: @(#) $Id: tcl.m4,v 1.5 2006/06/22 14:03:24 patthoyts Exp $
# RCS: @(#) $Id: tcl.m4,v 1.6 2007/06/22 21:19:12 hobbs2 Exp $

AC_PREREQ(2.50)
AC_PREREQ(2.57)

dnl TEA extensions pass this us the version of TEA they think they
dnl TEA extensions pass us the version of TEA they think they
dnl are compatible with (must be set in TEA_INIT below)
dnl TEA_VERSION="3.5"
dnl TEA_VERSION="3.6"

# Possible values for key variables defined:
#
# TEA_WINDOWINGSYSTEM - win32 aqua x11 (mirrors 'tk windowingsystem')
# TEA_PLATFORM        - windows unix
#

#------------------------------------------------------------------------

AC_DEFUN([TEA_LOAD_TCLCONFIG], [
    AC_MSG_CHECKING([for existence of ${TCL_BIN_DIR}/tclConfig.sh])

    if test -f "${TCL_BIN_DIR}/tclConfig.sh" ; then
        AC_MSG_RESULT([loading])
	. ${TCL_BIN_DIR}/tclConfig.sh
	. "${TCL_BIN_DIR}/tclConfig.sh"
    else
        AC_MSG_RESULT([could not find ${TCL_BIN_DIR}/tclConfig.sh])
    fi

    # eval is required to do the TCL_DBGX substitution
    eval "TCL_LIB_FILE=\"${TCL_LIB_FILE}\""
    eval "TCL_STUB_LIB_FILE=\"${TCL_STUB_LIB_FILE}\""

    # If the TCL_BIN_DIR is the build directory (not the install directory),
    # then set the common variable name to the value of the build variables.
    # For example, the variable TCL_LIB_SPEC will be set to the value
    # of TCL_BUILD_LIB_SPEC. An extension should make use of TCL_LIB_SPEC
    # instead of TCL_BUILD_LIB_SPEC since it will work with both an
    # installed and uninstalled version of Tcl.
    if test -f ${TCL_BIN_DIR}/Makefile ; then
    if test -f "${TCL_BIN_DIR}/Makefile" ; then
        TCL_LIB_SPEC=${TCL_BUILD_LIB_SPEC}
        TCL_STUB_LIB_SPEC=${TCL_BUILD_STUB_LIB_SPEC}
        TCL_STUB_LIB_PATH=${TCL_BUILD_STUB_LIB_PATH}
    elif test "`uname -s`" = "Darwin"; then
	# If Tcl was built as a framework, attempt to use the libraries
	# from the framework at the given location so that linking works
	# against Tcl.framework installed in an arbitary location.
	case ${TCL_DEFS} in
	    *TCL_FRAMEWORK*)
		if test -f ${TCL_BIN_DIR}/${TCL_LIB_FILE}; then
		if test -f "${TCL_BIN_DIR}/${TCL_LIB_FILE}"; then
		    for i in "`cd ${TCL_BIN_DIR}; pwd`" \
			     "`cd ${TCL_BIN_DIR}/../..; pwd`"; do
			if test "`basename "$i"`" = "${TCL_LIB_FILE}.framework"; then
			    TCL_LIB_SPEC="-F`dirname "$i"` -framework ${TCL_LIB_FILE}"
			    break
			fi
		    done
		fi
		if test -f ${TCL_BIN_DIR}/${TCL_STUB_LIB_FILE}; then
		if test -f "${TCL_BIN_DIR}/${TCL_STUB_LIB_FILE}"; then
		    TCL_STUB_LIB_SPEC="-L${TCL_BIN_DIR} ${TCL_STUB_LIB_FLAG}"
		    TCL_STUB_LIB_PATH="${TCL_BIN_DIR}/${TCL_STUB_LIB_FILE}"
		fi
		;;
	esac
    fi

#------------------------------------------------------------------------

AC_DEFUN([TEA_LOAD_TKCONFIG], [
    AC_MSG_CHECKING([for existence of ${TK_BIN_DIR}/tkConfig.sh])

    if test -f "${TK_BIN_DIR}/tkConfig.sh" ; then
        AC_MSG_RESULT([loading])
	. ${TK_BIN_DIR}/tkConfig.sh
	. "${TK_BIN_DIR}/tkConfig.sh"
    else
        AC_MSG_RESULT([could not find ${TK_BIN_DIR}/tkConfig.sh])
    fi

    # eval is required to do the TK_DBGX substitution
    eval "TK_LIB_FILE=\"${TK_LIB_FILE}\""
    eval "TK_STUB_LIB_FILE=\"${TK_STUB_LIB_FILE}\""

    # If the TK_BIN_DIR is the build directory (not the install directory),
    # then set the common variable name to the value of the build variables.
    # For example, the variable TK_LIB_SPEC will be set to the value
    # of TK_BUILD_LIB_SPEC. An extension should make use of TK_LIB_SPEC
    # instead of TK_BUILD_LIB_SPEC since it will work with both an
    # installed and uninstalled version of Tcl.
    if test -f ${TK_BIN_DIR}/Makefile ; then
    if test -f "${TK_BIN_DIR}/Makefile" ; then
        TK_LIB_SPEC=${TK_BUILD_LIB_SPEC}
        TK_STUB_LIB_SPEC=${TK_BUILD_STUB_LIB_SPEC}
        TK_STUB_LIB_PATH=${TK_BUILD_STUB_LIB_PATH}
    elif test "`uname -s`" = "Darwin"; then
	# If Tk was built as a framework, attempt to use the libraries
	# from the framework at the given location so that linking works
	# against Tk.framework installed in an arbitary location.
	case ${TK_DEFS} in
	    *TK_FRAMEWORK*)
		if test -f ${TK_BIN_DIR}/${TK_LIB_FILE}; then
		if test -f "${TK_BIN_DIR}/${TK_LIB_FILE}"; then
		    for i in "`cd ${TK_BIN_DIR}; pwd`" \
			     "`cd ${TK_BIN_DIR}/../..; pwd`"; do
			if test "`basename "$i"`" = "${TK_LIB_FILE}.framework"; then
			    TK_LIB_SPEC="-F`dirname "$i"` -framework ${TK_LIB_FILE}"
			    break
			fi
		    done
		fi
		if test -f ${TK_BIN_DIR}/${TK_STUB_LIB_FILE}; then
		if test -f "${TK_BIN_DIR}/${TK_STUB_LIB_FILE}"; then
		    TK_STUB_LIB_SPEC="-L${TK_BIN_DIR} ${TK_STUB_LIB_FLAG}"
		    TK_STUB_LIB_PATH="${TK_BIN_DIR}/${TK_STUB_LIB_FILE}"
		fi
		;;
	esac
    fi

    HAVE_LANGINFO=0
    if test "$langinfo_ok" = "yes"; then
	AC_CHECK_HEADER(langinfo.h,[langinfo_ok=yes],[langinfo_ok=no])
    fi
    AC_MSG_CHECKING([whether to use nl_langinfo])
    if test "$langinfo_ok" = "yes"; then
	AC_CACHE_VAL(tcl_cv_langinfo_h,
	AC_CACHE_VAL(tcl_cv_langinfo_h, [
	    AC_TRY_COMPILE([#include <langinfo.h>], [nl_langinfo(CODESET);],
		    [tcl_cv_langinfo_h=yes],[tcl_cv_langinfo_h=no]))
		    [tcl_cv_langinfo_h=yes],[tcl_cv_langinfo_h=no])])
	AC_MSG_RESULT([$tcl_cv_langinfo_h])
	if test $tcl_cv_langinfo_h = yes; then
	    AC_DEFINE(HAVE_LANGINFO, 1, [Do we have nl_langinfo()?])
	fi
    else 
	AC_MSG_RESULT([$langinfo_ok])
    fi

		AC_MSG_WARN([can't find uname command])
		tcl_cv_sys_version=unknown
	    else
		# Special check for weird MP-RAS system (uname returns weird
		# results, and the version is kept in special file).

		if test -r /etc/.relid -a "X`uname -n`" = "X`uname -s`" ; then
		    tcl_cv_sys_version=MP-RAS-`awk '{print [$]3}' /etc/.relid`
		    tcl_cv_sys_version=MP-RAS-`awk '{print $[3]}' /etc/.relid`
		fi
		if test "`uname -s`" = "AIX" ; then
		    tcl_cv_sys_version=AIX-`uname -v`.`uname -r`
		fi
	    fi
	fi
    ])

	HP-UX-*.11.*)
	    # Use updated header definitions where possible
	    AC_DEFINE(_XOPEN_SOURCE_EXTENDED, 1, [Do we want to use the XOPEN network library?])
	    # Needed by Tcl, but not most extensions
	    #AC_DEFINE(_XOPEN_SOURCE, 1, [Do we want to use the XOPEN network library?])
	    #LIBS="$LIBS -lxnet"               # Use the XOPEN network library

	    if test "`uname -m`" = "ia64" ; then
		SHLIB_SUFFIX=".so"
		# Use newer C++ library for C++ extensions
		#if test "$GCC" != "yes" ; then
		#   CPPFLAGS="-AA"
		#fi
	    else
	    SHLIB_SUFFIX=".sl"
		SHLIB_SUFFIX=".sl"
	    fi
	    AC_CHECK_LIB(dld, shl_load, tcl_ok=yes, tcl_ok=no)
	    if test "$tcl_ok" = yes; then
		SHLIB_CFLAGS="+z"
		SHLIB_LD="ld -b"
		SHLIB_LD_LIBS='${LIBS}'
		DL_OBJS="tclLoadShl.o"
		DL_LIBS="-ldld"

	    CFLAGS_OPTIMIZE="-O2 -fomit-frame-pointer"
	    # egcs-2.91.66 on Redhat Linux 6.0 generates lots of warnings 
	    # when you inline the string and math operations.  Turn this off to
	    # get rid of the warnings.
	    #CFLAGS_OPTIMIZE="${CFLAGS_OPTIMIZE} -D__NO_STRING_INLINES -D__NO_MATH_INLINES"

	    # TEA specific: use LDFLAGS_DEFAULT instead of LDFLAGS here:
	    SHLIB_LD="${CC} -shared"
	    SHLIB_LD='${CC} -shared ${CFLAGS} ${LDFLAGS_DEFAULT}'
	    DL_OBJS="tclLoadDl.o"
	    DL_LIBS="-ldl"
	    LDFLAGS="$LDFLAGS -Wl,--export-dynamic"
	    CC_SEARCH_FLAGS='-Wl,-rpath,${LIB_RUNTIME_DIR}'
	    LD_SEARCH_FLAGS=${CC_SEARCH_FLAGS}
	    if test "`uname -m`" = "alpha" ; then
		CFLAGS="$CFLAGS -mieee"
	    fi
	    if test $do64bit = yes; then
		AC_CACHE_CHECK([if compiler accepts -m64 flag], tcl_cv_cc_m64, [
		    hold_cflags=$CFLAGS
		    CFLAGS="$CFLAGS -m64"
		    AC_TRY_LINK(,, tcl_cv_cc_m64=yes, tcl_cv_cc_m64=no)
		    CFLAGS=$hold_cflags])
		if test $tcl_cv_cc_m64 = yes; then
		    CFLAGS="$CFLAGS -m64"
		    do64bit_ok=yes
		fi
	    fi

	    # The combo of gcc + glibc has a bug related
	    # to inlining of functions like strtod(). The
	    # -fno-builtin flag should address this problem
	    # but it does not work. The -fno-inline flag
	    # is kind of overkill but it works.

	    	TCL_LIB_VERSIONS_OK=nodots
		;;
	    esac
	    ;;
	Darwin-*)
	    CFLAGS_OPTIMIZE="-Os"
	    SHLIB_CFLAGS="-fno-common"
	    # To avoid discrepancies between what headers configure sees during
	    # preprocessing tests and compiling tests, move any -isysroot and
	    # -mmacosx-version-min flags from CFLAGS to CPPFLAGS:
	    CPPFLAGS="${CPPFLAGS} `echo " ${CFLAGS}" | \
		awk 'BEGIN {FS=" +-";ORS=" "}; {for (i=2;i<=NF;i++) \
		if ([$]i~/^(isysroot|mmacosx-version-min)/) print "-"[$]i}'`"
	    CFLAGS="`echo " ${CFLAGS}" | \
		awk 'BEGIN {FS=" +-";ORS=" "}; {for (i=2;i<=NF;i++) \
		if (!([$]i~/^(isysroot|mmacosx-version-min)/)) print "-"[$]i}'`"
	    if test $do64bit = yes; then
		case `arch` in
		    ppc)
			AC_CACHE_CHECK([if compiler accepts -arch ppc64 flag],
				tcl_cv_cc_arch_ppc64, [
			    hold_cflags=$CFLAGS
			    CFLAGS="$CFLAGS -arch ppc64 -mpowerpc64 -mcpu=G5"
			    AC_TRY_LINK(,, tcl_cv_cc_arch_ppc64=yes,
				    tcl_cv_cc_arch_ppc64=no)
			    CFLAGS=$hold_cflags])
			if test $tcl_cv_cc_arch_ppc64 = yes; then
			    CFLAGS="$CFLAGS -arch ppc64 -mpowerpc64 -mcpu=G5"
	        do64bit_ok=yes
	        CFLAGS="$CFLAGS -arch ppc64 -mpowerpc64 -mcpu=G5"
			    do64bit_ok=yes
			fi;;
		    i386)
			AC_CACHE_CHECK([if compiler accepts -arch x86_64 flag],
				tcl_cv_cc_arch_x86_64, [
			    hold_cflags=$CFLAGS
			    CFLAGS="$CFLAGS -arch x86_64"
			    AC_TRY_LINK(,, tcl_cv_cc_arch_x86_64=yes,
				    tcl_cv_cc_arch_x86_64=no)
			    CFLAGS=$hold_cflags])
			if test $tcl_cv_cc_arch_x86_64 = yes; then
			    CFLAGS="$CFLAGS -arch x86_64"
			    do64bit_ok=yes
			fi;;
		    *)
			AC_MSG_WARN([Don't know how enable 64-bit on architecture `arch`]);;
		esac
	    else
		# Check for combined 32-bit and 64-bit fat build
		echo "$CFLAGS " | grep -E -q -- '-arch (ppc64|x86_64) ' && \
		    echo "$CFLAGS " | grep -E -q -- '-arch (ppc|i386) ' && \
		    fat_32_64=yes
	    fi
	    # TEA specific: use LDFLAGS_DEFAULT instead of LDFLAGS here:
	    SHLIB_LD='${CC} -dynamiclib ${CFLAGS} ${LDFLAGS_DEFAULT}'
	    AC_CACHE_CHECK([if ld accepts -single_module flag], tcl_cv_ld_single_module, [
	        hold_ldflags=$LDFLAGS
	        LDFLAGS="$LDFLAGS -dynamiclib -Wl,-single_module"
	        AC_TRY_LINK(, [int i;], tcl_cv_ld_single_module=yes, tcl_cv_ld_single_module=no)
	        LDFLAGS=$hold_ldflags])
		hold_ldflags=$LDFLAGS
		LDFLAGS="$LDFLAGS -dynamiclib -Wl,-single_module"
		AC_TRY_LINK(, [int i;], tcl_cv_ld_single_module=yes, tcl_cv_ld_single_module=no)
		LDFLAGS=$hold_ldflags])
	    if test $tcl_cv_ld_single_module = yes; then
	        SHLIB_LD="${SHLIB_LD} -Wl,-single_module"
		SHLIB_LD="${SHLIB_LD} -Wl,-single_module"
	    fi
	    SHLIB_LD_LIBS='${LIBS}'
	    SHLIB_SUFFIX=".dylib"
	    DL_OBJS="tclLoadDyld.o"
	    DL_LIBS=""
	    # Don't use -prebind when building for Mac OS X 10.4 or later only:
	    test -z "${MACOSX_DEPLOYMENT_TARGET}" || \
		test "`echo "${MACOSX_DEPLOYMENT_TARGET}" | awk -F. '{print [$]2}'`" -lt 4 && \
	    test "`echo "${MACOSX_DEPLOYMENT_TARGET}" | awk -F '10\\.' '{print int([$]2)}'`" -lt 4 -a \
		"`echo "${CPPFLAGS}" | awk -F '-mmacosx-version-min=10\\.' '{print int([$]2)}'`" -lt 4 && \
		LDFLAGS="$LDFLAGS -prebind"
	    LDFLAGS="$LDFLAGS -headerpad_max_install_names"
	    AC_CACHE_CHECK([if ld accepts -search_paths_first flag], tcl_cv_ld_search_paths_first, [
	        hold_ldflags=$LDFLAGS
	        LDFLAGS="$LDFLAGS -Wl,-search_paths_first"
	        AC_TRY_LINK(, [int i;], tcl_cv_ld_search_paths_first=yes, tcl_cv_ld_search_paths_first=no)
	        LDFLAGS=$hold_ldflags])
		hold_ldflags=$LDFLAGS
		LDFLAGS="$LDFLAGS -Wl,-search_paths_first"
		AC_TRY_LINK(, [int i;], tcl_cv_ld_search_paths_first=yes, tcl_cv_ld_search_paths_first=no)
		LDFLAGS=$hold_ldflags])
	    if test $tcl_cv_ld_search_paths_first = yes; then
	        LDFLAGS="$LDFLAGS -Wl,-search_paths_first"
		LDFLAGS="$LDFLAGS -Wl,-search_paths_first"
	    fi
	    CC_SEARCH_FLAGS=""
	    LD_SEARCH_FLAGS=""
	    LD_LIBRARY_PATH_VAR="DYLD_LIBRARY_PATH"

	    # TEA specific: for Tk extensions, remove -arch ppc64 from CFLAGS
	    # for fat builds, as neither TkAqua nor TkX11 can be built for 64bit
	    # TEA specific: for Tk extensions, remove 64-bit arch flags from
	    # CFLAGS et al. for combined 32 & 64 bit fat builds as neither
	    # TkAqua nor TkX11 can be built for 64-bit at present.
	    # at present (no 64bit GUI libraries).
	    test $do64bit_ok = no && test -n "${TK_BIN_DIR}" && \
	        CFLAGS="`echo "$CFLAGS" | sed -e 's/-arch ppc64/-arch ppc/g'`"
	    test "$fat_32_64" = yes && test -n "${TK_BIN_DIR}" && for v in CFLAGS CPPFLAGS LDFLAGS; do
		eval $v'="`echo "$'$v' "|sed -e "s/-arch ppc64 / /g" -e "s/-arch x86_64 / /g"`"'; done
	    ;;
	NEXTSTEP-*)
	    SHLIB_CFLAGS=""
	    SHLIB_LD="cc -nostdlib -r"
	    SHLIB_LD_LIBS=""
	    SHLIB_SUFFIX=".so"
	    DL_OBJS="tclLoadNext.o"

	    LD_SEARCH_FLAGS=""
	    ;;
    esac

    if test "$do64bit" = "yes" -a "$do64bit_ok" = "no" ; then
	AC_MSG_WARN([64bit support being disabled -- don't know magic for this platform])
    fi

dnl # Add any CPPFLAGS set in the environment to our CFLAGS, but delay doing so
dnl # until the end of configure, as configure's compile and link tests use
dnl # both CPPFLAGS and CFLAGS (unlike our compile and link) but configure's
dnl # preprocessing tests use only CPPFLAGS.
    AC_CONFIG_COMMANDS_PRE([CFLAGS="${CFLAGS} ${CPPFLAGS}"; CPPFLAGS=""])

    # Step 4: disable dynamic loading if requested via a command-line switch.

    AC_ARG_ENABLE(load,
	AC_HELP_STRING([--disable-load],
	    [disallow dynamic loading and "load" command (default: enabled)]),
	AC_HELP_STRING([--enable-load],
	    [allow dynamic loading and "load" command (default: on)]),
	[tcl_ok=$enableval], [tcl_ok=yes])
    if test "$tcl_ok" = "no"; then
	DL_OBJS=""
    fi

    if test "x$DL_OBJS" != "x" ; then
	BUILD_DLTEST="\$(DLTEST_TARGETS)"

#		HAVE_STRING_H ?
#
# tkUnixPort.h checks for HAVE_LIMITS_H, so do both HAVE and
# CHECK on limits.h
#--------------------------------------------------------------------

AC_DEFUN([TEA_MISSING_POSIX_HEADERS], [
    AC_CACHE_CHECK([dirent.h], tcl_cv_dirent_h,
    AC_CACHE_CHECK([dirent.h], tcl_cv_dirent_h, [
    AC_TRY_LINK([#include <sys/types.h>
#include <dirent.h>], [
#ifndef _POSIX_SOURCE
#   ifdef __Lynx__
	/*
	 * Generate compilation error to make the test fail:  Lynx headers
	 * are only valid if really in the POSIX environment.
	 */

	missing_procedure();
#   endif
#endif
DIR *d;
struct dirent *entryPtr;
char *p;
d = opendir("foobar");
entryPtr = readdir(d);
p = entryPtr->d_name;
closedir(d);
], tcl_cv_dirent_h=yes, tcl_cv_dirent_h=no))
], tcl_cv_dirent_h=yes, tcl_cv_dirent_h=no)])

    if test $tcl_cv_dirent_h = no; then
	AC_DEFINE(NO_DIRENT_H, 1, [Do we have <dirent.h>?])
    fi

    AC_CHECK_HEADER(errno.h, , [AC_DEFINE(NO_ERRNO_H, 1, [Do we have <errno.h>?])])
    AC_CHECK_HEADER(float.h, , [AC_DEFINE(NO_FLOAT_H, 1, [Do we have <float.h>?])])

AC_DEFUN([TEA_TIME_HANDLER], [
    AC_CHECK_HEADERS(sys/time.h)
    AC_HEADER_TIME
    AC_STRUCT_TIMEZONE

    AC_CHECK_FUNCS(gmtime_r localtime_r)

    AC_CACHE_CHECK([tm_tzadj in struct tm], tcl_cv_member_tm_tzadj,
    AC_CACHE_CHECK([tm_tzadj in struct tm], tcl_cv_member_tm_tzadj, [
	AC_TRY_COMPILE([#include <time.h>], [struct tm tm; tm.tm_tzadj;],
	    tcl_cv_member_tm_tzadj=yes, tcl_cv_member_tm_tzadj=no))
	    tcl_cv_member_tm_tzadj=yes, tcl_cv_member_tm_tzadj=no)])
    if test $tcl_cv_member_tm_tzadj = yes ; then
	AC_DEFINE(HAVE_TM_TZADJ, 1, [Should we use the tm_tzadj field of struct tm?])
    fi

    AC_CACHE_CHECK([tm_gmtoff in struct tm], tcl_cv_member_tm_gmtoff,
    AC_CACHE_CHECK([tm_gmtoff in struct tm], tcl_cv_member_tm_gmtoff, [
	AC_TRY_COMPILE([#include <time.h>], [struct tm tm; tm.tm_gmtoff;],
	    tcl_cv_member_tm_gmtoff=yes, tcl_cv_member_tm_gmtoff=no))
	    tcl_cv_member_tm_gmtoff=yes, tcl_cv_member_tm_gmtoff=no)])
    if test $tcl_cv_member_tm_gmtoff = yes ; then
	AC_DEFINE(HAVE_TM_GMTOFF, 1, [Should we use the tm_gmtoff field of struct tm?])
    fi

    #
    # Its important to include time.h in this check, as some systems
    # (like convex) have timezone functions, etc.
    #
    AC_CACHE_CHECK([long timezone variable], tcl_cv_timezone_long,
    AC_CACHE_CHECK([long timezone variable], tcl_cv_timezone_long, [
	AC_TRY_COMPILE([#include <time.h>],
	    [extern long timezone;
	    timezone += 1;
	    exit (0);],
	    tcl_cv_timezone_long=yes, tcl_cv_timezone_long=no))
	    tcl_cv_timezone_long=yes, tcl_cv_timezone_long=no)])
    if test $tcl_cv_timezone_long = yes ; then
	AC_DEFINE(HAVE_TIMEZONE_VAR, 1, [Should we use the global timezone variable?])
    else
	#
	# On some systems (eg IRIX 6.2), timezone is a time_t and not a long.
	#
	AC_CACHE_CHECK([time_t timezone variable], tcl_cv_timezone_time,
	AC_CACHE_CHECK([time_t timezone variable], tcl_cv_timezone_time, [
	    AC_TRY_COMPILE([#include <time.h>],
		[extern time_t timezone;
		timezone += 1;
		exit (0);],
		tcl_cv_timezone_time=yes, tcl_cv_timezone_time=no))
		tcl_cv_timezone_time=yes, tcl_cv_timezone_time=no)])
	if test $tcl_cv_timezone_time = yes ; then
	    AC_DEFINE(HAVE_TIMEZONE_VAR, 1, [Should we use the global timezone variable?])
	fi
    fi
])

#--------------------------------------------------------------------

#	is a lightweight replacement for AC_EXEEXT that doesn't require
#	a compiler.
#------------------------------------------------------------------------

AC_DEFUN([TEA_INIT], [
    # TEA extensions pass this us the version of TEA they think they
    # are compatible with.
    TEA_VERSION="3.5"
    TEA_VERSION="3.6"

    AC_MSG_CHECKING([for correct TEA configuration])
    if test x"${PACKAGE_NAME}" = x ; then
	AC_MSG_ERROR([
The PACKAGE_NAME variable must be defined by your TEA configure.in])
    fi
    if test x"$1" = x ; then

    #------------------------------------------------------------------------
    # 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 "$no_pipe" -a -n "$GCC"; then
	AC_MSG_CHECKING([if the compiler understands -pipe])
	AC_CACHE_CHECK([if the compiler understands -pipe],
	OLDCC="$CC"
	CC="$CC -pipe"
	AC_TRY_COMPILE(,, AC_MSG_RESULT([yes]), CC="$OLDCC"
	    AC_MSG_RESULT([no]))
	    tcl_cv_cc_pipe, [
	    hold_cflags=$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

    #--------------------------------------------------------------------
    # Common compiler flag setup
    #--------------------------------------------------------------------

    AC_C_BIGENDIAN

        case ${TCL_DEFS} in
	    *TCL_FRAMEWORK*)
	        if test -d "${TCL_BIN_DIR}/Headers" -a -d "${TCL_BIN_DIR}/PrivateHeaders"; then
	        TCL_INCLUDES="-I\"${TCL_BIN_DIR}/Headers\" -I\"${TCL_BIN_DIR}/PrivateHeaders\" ${TCL_INCLUDES}"; else
	        TCL_INCLUDES="${TCL_INCLUDES} ${TCL_INCLUDE_SPEC} `echo "${TCL_INCLUDE_SPEC}" | sed -e 's/Headers/PrivateHeaders/'`"; fi
	        ;;
	esac
    else
	if test ! -f "${TCL_SRC_DIR}/generic/tclInt.h" ; then
	    AC_MSG_ERROR([Cannot find private header tclInt.h in ${TCL_SRC_DIR}])
    fi
	fi
    fi


    AC_SUBST(TCL_TOP_DIR_NATIVE)
    AC_SUBST(TCL_GENERIC_DIR_NATIVE)
    AC_SUBST(TCL_UNIX_DIR_NATIVE)
    AC_SUBST(TCL_WIN_DIR_NATIVE)
    AC_SUBST(TCL_BMAP_DIR_NATIVE)
    AC_SUBST(TCL_TOOL_DIR_NATIVE)

        # the framework's Headers and PrivateHeaders directories
        case ${TK_DEFS} in
	    *TK_FRAMEWORK*)
	        if test -d "${TK_BIN_DIR}/Headers" -a -d "${TK_BIN_DIR}/PrivateHeaders"; then
	        TK_INCLUDES="-I\"${TK_BIN_DIR}/Headers\" -I\"${TK_BIN_DIR}/PrivateHeaders\" ${TK_INCLUDES}"; fi
	        ;;
	esac
    else
	if test ! -f "${TK_SRC_DIR}/generic/tkInt.h" ; then
	    AC_MSG_ERROR([Cannot find private header tkInt.h in ${TK_SRC_DIR}])
	fi
    fi

    AC_SUBST(TK_TOP_DIR_NATIVE)
    AC_SUBST(TK_UNIX_DIR_NATIVE)
    AC_SUBST(TK_WIN_DIR_NATIVE)
    AC_SUBST(TK_GENERIC_DIR_NATIVE)
    AC_SUBST(TK_XLIB_DIR_NATIVE)

#	Substs the following vars:
#		TK_INCLUDES
#------------------------------------------------------------------------

AC_DEFUN([TEA_PUBLIC_TK_HEADERS], [
    AC_MSG_CHECKING([for Tk public headers])

    AC_ARG_WITH(tkinclude, [  --with-tkinclude      directory containing the public Tk header files.], with_tkinclude=${withval})
    AC_ARG_WITH(tkinclude, [  --with-tkinclude        directory containing the public Tk header files], with_tkinclude=${withval})

    AC_CACHE_VAL(ac_cv_c_tkh, [
	# Use the value from --with-tkinclude, if it was given

	if test x"${with_tkinclude}" != x ; then
	    if test -f "${with_tkinclude}/tk.h" ; then
		ac_cv_c_tkh=${with_tkinclude}

#------------------------------------------------------------------------

AC_DEFUN([TEA_LOAD_CONFIG], [
    AC_MSG_CHECKING([for existence of ${$1_BIN_DIR}/$1Config.sh])

    if test -f "${$1_BIN_DIR}/$1Config.sh" ; then
        AC_MSG_RESULT([loading])
	. ${$1_BIN_DIR}/$1Config.sh
	. "${$1_BIN_DIR}/$1Config.sh"
    else
        AC_MSG_RESULT([file not found])
    fi

    #
    # If the $1_BIN_DIR is the build directory (not the install directory),
    # then set the common variable name to the value of the build variables.
    # For example, the variable $1_LIB_SPEC will be set to the value
    # of $1_BUILD_LIB_SPEC. An extension should make use of $1_LIB_SPEC
    # instead of $1_BUILD_LIB_SPEC since it will work with both an
    # installed and uninstalled version of Tcl.
    #

    if test -f ${$1_BIN_DIR}/Makefile ; then
    if test -f "${$1_BIN_DIR}/Makefile" ; then
	AC_MSG_WARN([Found Makefile - using build library specs for $1])
        $1_LIB_SPEC=${$1_BUILD_LIB_SPEC}
        $1_STUB_LIB_SPEC=${$1_BUILD_STUB_LIB_SPEC}
        $1_STUB_LIB_PATH=${$1_BUILD_STUB_LIB_PATH}
    fi

    AC_SUBST($1_VERSION)