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	if test -f "${tclconfigsh}"; then
		. "${tclconfigsh}"

		CFLAGS="${CFLAGS} ${TCL_INCLUDE_SPEC} -I${TCL_SRC_DIR}/generic -I${tclconfigshdir}"
		CPPFLAGS="${CPPFLAGS} ${TCL_INCLUDE_SPEC} -I${TCL_SRC_DIR}/generic -I${tclconfigshdir}"
		LIBS="${LIBS} ${TCL_LIBS}"

		KITDLL_LIB_VERSION=`echo "${TCL_VERSION}${TCL_PATCH_LEVEL}" | sed 's@\.@@g'`
	fi

	AC_SUBST(CFLAGS)
	AC_SUBST(CPPFLAGS)
	AC_SUBST(LIBS)
	AC_SUBST(KITDLL_LIB_VERSION)

	AC_MSG_RESULT([$tclconfigsh])
])

AC_DEFUN(DC_DO_TK, [
	AC_MSG_CHECKING([path to tk])
	AC_ARG_WITH(tk, AC_HELP_STRING([--with-tk], [directory containing tk configuration (tkConfig.sh)]), [], [
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		DC_DO_STATIC_LINK_LIB([C++ Library (UNIX)], [-lstdc++])
	])
])

AC_DEFUN(DC_FIND_TCLKIT_LIBS, [
	DC_SETUP_TCL_PLAT_DEFS

	dnl We will need this for the Tcl project, which we will always have
	DC_CHECK_FOR_WHOLE_ARCHIVE

	for proj in mk4tcl tcl tclvfs tk; do
	for proj in mk4tcl tcl tclvfs tk zlib; do
		AC_MSG_CHECKING([for libraries required for ${proj}])

		libdir="../../../${proj}/inst"
		libfiles="`find "${libdir}" -name '*.a' 2>/dev/null | tr "\n" ' '`"
		libfilesnostub="`find "${libdir}" -name '*.a' 2>/dev/null | grep -v 'stub' | tr "\n" ' '`"
		projlibdir="../../../${proj}/inst"
		projlibfiles="`find "${projlibdir}" -name '*.a' 2>/dev/null | tr "\n" ' '`"
		projlibfilesnostub="`find "${projlibdir}" -name '*.a' 2>/dev/null | grep -v 'stub' | tr "\n" ' '`"

		AC_MSG_RESULT([${projlibfilesnostub}])
		ARCHS="${ARCHS} ${libfiles}"

		hide_symbols="1"

		if test "${proj}" = "tcl"; then
			DC_TEST_WHOLE_ARCHIVE_SHARED_LIB([$ARCHS $projlibfilesnostub], [
				projlibfiles="${projlibfilesnostub}"
			], [
				DC_TEST_WHOLE_ARCHIVE_SHARED_LIB([$ARCHS $projlibfiles], [
		AC_MSG_RESULT([${libfiles}])
					projlibfiles="${projlibfiles}"
				])
			])

			hide_symbols="0"
		fi
		if test "${libfilesnostub}" != ""; then
			if test "${proj}" = "mk4tcl"; then

		if test "${proj}" = "mk4tcl"; then
			if test -n "${projlibfiles}"; then
				AC_DEFINE(KIT_INCLUDES_MK4TCL, [1], [Specify this if you link against mkt4tcl])

				kc_cv_feature_kit_includes_mk4tcl='1'

				DC_DO_STATIC_LINK_LIBCXX
			fi
		fi

			if test "${proj}" = "tk"; then
		if test "${proj}" = "tk"; then
			if test "${projlibfilesnostub}" != ""; then
				DC_DO_TK
				AC_DEFINE(KIT_INCLUDES_TK, [1], [Specify this if we link statically to Tk])
				if test -n "${TK_VERSION}"; then
					AC_DEFINE_UNQUOTED(KIT_TK_VERSION, "${TK_VERSION}${TK_PATCH_LEVEL}", [Specify the version of Tk])
				fi

				if test "$host_os" = "mingw32msvc" -o "$host_os" = "mingw32"; then
					AC_DEFINE(KITSH_NEED_WINMAIN, [1], [Define if you need WinMain (Windows)])
					CFLAGS="${CFLAGS} -mwindows"
				fi

				DC_TEST_WHOLE_ARCHIVE_SHARED_LIB([$ARCHS $projlibfilesnostub], [
					projlibfiles="${projlibfilesnostub}"
				], [
					DC_TEST_WHOLE_ARCHIVE_SHARED_LIB([$ARCHS $projlibfiles], [
						projlibfiles="${projlibfiles}"
					])
				])

				hide_symbols="0"
			fi
		fi

		if test "${hide_symbols}" = "1"; then
			STRIPLIBS="${STRIPLIBS} ${projlibfiles}"
		fi

		dnl Do not explicitly link to Zlib, that will happen elsewhere
		if test "${proj}" = "zlib"; then
			continue
		fi

		ARCHS="${ARCHS} ${projlibfiles}"
	done

	AC_SUBST(ARCHS)
	AC_SUBST(STRIPLIBS)
])

AC_DEFUN(DC_SETUP_TCL_PLAT_DEFS, [
	AC_CANONICAL_BUILD
	AC_CANONICAL_HOST
  
	AC_MSG_CHECKING(host operating system)
	AC_MSG_RESULT($host_os)
  
	case $host_os in
		mingw32*)
			CFLAGS="${CFLAGS} -mno-cygwin -mms-bitfields"
			WISH_CFLAGS="-mwindows"

			dnl If we are building for Win32, we need to define "BUILD_tcl" so that
			dnl TCL_STORAGE_CLASS gets defined as DLLEXPORT, to make static linking
			dnl work
			AC_DEFINE(BUILD_tcl, [1], [Define if you need to pretend to be building Tcl (Windows)])
			AC_DEFINE(BUILD_tk, [1], [Define if you need to pretend to be building Tk (Windows)])
			;;
		cygwin*)
			CFLAGS="${CFLAGS} -mms-bitfields"
			WISH_CFLAGS="-mwindows"
			;;
	esac

	AC_SUBST(WISH_CFLAGS)
])

AC_DEFUN(DC_STATIC_LIBGCC, [
	AC_MSG_CHECKING([how to link statically against libgcc])

	SAVELDFLAGS="${LDFLAGS}"
	staticlibgcc=""
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			AC_MSG_RESULT([found])
			AC_DEFINE(HAVE_ACCEPTABLE_DLADDR, [1], [Define to 1 if you have an acceptable dladdr implementation with dli_fname])
		], [
			AC_MSG_RESULT([not found])
		]
	)
])

dnl Usage:
dnl    DC_TEST_SHOBJFLAGS(shobjflags, shobjldflags, action-if-not-found)
dnl
AC_DEFUN(DC_TEST_SHOBJFLAGS, [
  AC_SUBST(SHOBJFLAGS)
  AC_SUBST(SHOBJLDFLAGS)

  OLD_LDFLAGS="$LDFLAGS"
  SHOBJFLAGS=""

  LDFLAGS="$OLD_LDFLAGS $1 $2"

  AC_TRY_LINK([#include <stdio.h>
int unrestst(void);], [ printf("okay\n"); unrestst(); return(0); ], [ SHOBJFLAGS="$1"; SHOBJLDFLAGS="$2" ], [
  LDFLAGS="$OLD_LDFLAGS"
  $3
])

  LDFLAGS="$OLD_LDFLAGS"
])

AC_DEFUN(DC_GET_SHOBJFLAGS, [
  AC_SUBST(SHOBJFLAGS)
  AC_SUBST(SHOBJLDFLAGS)

  AC_MSG_CHECKING(how to create shared objects)

  if test -z "$SHOBJFLAGS" -a -z "$SHOBJLDFLAGS"; then
    DC_TEST_SHOBJFLAGS([-fPIC -DPIC], [-shared -rdynamic], [
      DC_TEST_SHOBJFLAGS([-fPIC -DPIC], [-shared], [
        DC_TEST_SHOBJFLAGS([-fPIC -DPIC], [-shared -rdynamic -mimpure-text], [
          DC_TEST_SHOBJFLAGS([-fPIC -DPIC], [-shared -mimpure-text], [
            DC_TEST_SHOBJFLAGS([-fPIC -DPIC], [-shared -rdynamic -Wl,-G,-z,textoff], [
              DC_TEST_SHOBJFLAGS([-fPIC -DPIC], [-shared -Wl,-G,-z,textoff], [
                DC_TEST_SHOBJFLAGS([-fPIC -DPIC], [-shared -dynamiclib -flat_namespace -undefined suppress -bind_at_load], [
                  DC_TEST_SHOBJFLAGS([-fPIC -DPIC], [-dynamiclib -flat_namespace -undefined suppress -bind_at_load], [
                    DC_TEST_SHOBJFLAGS([-fPIC -DPIC], [-Wl,-dynamiclib -Wl,-flat_namespace -Wl,-undefined,suppress -Wl,-bind_at_load], [
                      DC_TEST_SHOBJFLAGS([-fPIC -DPIC], [-dynamiclib -flat_namespace -undefined suppress], [
                        DC_TEST_SHOBJFLAGS([-fPIC -DPIC], [-dynamiclib], [
                          AC_MSG_RESULT(cant)
                          AC_MSG_ERROR([We are unable to make shared objects.])
                        ])
                      ])
                    ])
                  ])
                ])
              ])
            ])
          ])
        ])
      ])
    ])
  fi

  AC_MSG_RESULT($SHOBJLDFLAGS $SHOBJFLAGS)
])

AC_DEFUN(DC_CHK_OS_INFO, [
	AC_CANONICAL_BUILD
	AC_CANONICAL_HOST

	AC_SUBST(SHOBJEXT)
	AC_SUBST(AREXT)
        AC_SUBST(SHOBJFLAGS)
        AC_SUBST(SHOBJLDFLAGS)

        AC_MSG_CHECKING(host operating system)
        AC_MSG_RESULT($host_os)

	SHOBJEXT="so"
	AREXT="a"

        case $host_os in
                darwin*)
			SHOBJEXT="dylib"
                        ;;
		hpux*)
			SHOBJEXT="sl"
			;;
		mingw*)
			SHOBJEXT="dll"
			SHOBJFLAGS="-mno-cygwin -mms-bitfields -DPIC"
			SHOBJLDFLAGS='-shared -Wl,--dll -Wl,--enable-auto-image-base -Wl,--output-def,$[@].def,--out-implib,$[@].a -Wl,--export-all-symbols -Wl,--add-stdcall-alias'
			;;
	esac
])

AC_DEFUN(DC_TEST_WHOLE_ARCHIVE_SHARED_LIB, [

	SAVE_LIBS="${LIBS}"

	LIBS="${WHOLEARCHIVE} $1 ${NOWHOLEARCHIVE} ${SAVE_LIBS}"
	AC_LINK_IFELSE(
		AC_LANG_PROGRAM([[
			]], [[
			]]
		),
		[
			LIBS="${SAVE_LIBS}"

			$2
		], [
			LIBS="${SAVE_LIBS}"

			$3
		]
	)
])

AC_DEFUN(DC_CHECK_FOR_WHOLE_ARCHIVE, [
	AC_MSG_CHECKING([for how to link whole archive])

	SAVE_CFLAGS="${CFLAGS}"

	wholearchive=""

	for check in "-Wl,--whole-archive -Wl,--no-whole-archive" "-Wl,-z,allextract -Wl,-z,defaultextract"; do
		CFLAGS="${SAVE_CFLAGS} ${check}"

		AC_LINK_IFELSE(AC_LANG_PROGRAM([], []),
			[
				wholearchive="${check}"

				break
			]
		)

	done

	CFLAGS="${SAVE_CFLAGS}"

	if test -z "${wholearchive}"; then
		AC_MSG_RESULT([not found])
	else
		AC_MSG_RESULT([${wholearchive}])

		WHOLEARCHIVE=`echo "${wholearchive}" | cut -f 1 -d ' '`
		NOWHOLEARCHIVE=`echo "${wholearchive}" | cut -f 2 -d ' '`
	fi

	AC_SUBST(WHOLEARCHIVE)
	AC_SUBST(NOWHOLEARCHIVE)
])

AC_DEFUN(DC_SETLDRUNPATH, [
	OLD_LDFLAGS="${LDFLAGS}"

	for testldflags in "-Wl,-rpath -Wl,$1" "-Wl,-R -Wl,$1"; do
		LDFLAGS="${OLD_LDFLAGS} ${testldflags}"
		AC_TRY_LINK([#include <stdio.h>], [ return(0); ], [
			LDRUNPATH="$LDRUNPATH $testldflags"

			break
		])
	done

	LDFLAGS="${OLD_LDFLAGS}"

	AC_SUBST(LDRUNPATH)
])
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