* unix/Makefile.in: Subst TCL_LIBS instead of

	DL_LIBS and MATH_LIBS.
	* unix/configure: Regen.
	* unix/configure.in: Remove SC_ENABLE_THREADS
	invocation. Thread support in an extension
	should be automatic when Tcl is compiled
	with thread support. Add AC_DEFINE calls
	to set TCL_THREADS, _REENTRANT, and
	_THREAD_SAFE since this was done in
	SC_ENABLE_THREADS. Remove socket and math
	lib checks since these are already done in
	the Tcl configure script.
	* unix/tcl.m4: Update from Tcl to get
	TCL_LIBS fix. This fixes bug 597847
	which was caused by improper linking.
	* unix/tkConfig.sh.in: Subst TCL_LIBS
	instead of MATH_LIBS and DL_LIBS.
	[Bug 597847]

5 files changed, 73 insertions, 1333 deletions

diff --git a/unix/Makefile.in b/unix/Makefile.in
index a20a3e3..ca362a7 100644
--- a/unix/Makefile.in
+++ b/unix/Makefile.in
@@ -5,7 +5,7 @@
 # "autoconf" program (constructs like "@foo@" will get replaced in the
 # actual Makefile.
 #
-# RCS: @(#) $Id: Makefile.in,v 1.87 2002/11/19 02:20:35 hobbs Exp $
+# RCS: @(#) $Id: Makefile.in,v 1.88 2003/04/04 19:29:38 mdejong Exp $
 
 # Current Tk version;  used in various names.
 
@@ -226,8 +226,8 @@ TCL_STUB_FLAGS		= @TCL_STUB_FLAGS@
 
 # Libraries to use when linking.  This definition is determined by the
 # configure script.
-LIBS = @LIBS@ $(X11_LIB_SWITCHES) @DL_LIBS@ @MATH_LIBS@
-WISH_LIBS = $(TCL_LIB_SPEC) @LIBS@ $(X11_LIB_SWITCHES) @DL_LIBS@ @MATH_LIBS@
+LIBS = @LIBS@ $(X11_LIB_SWITCHES) @TCL_LIBS@
+WISH_LIBS = $(TCL_LIB_SPEC) @LIBS@ $(X11_LIB_SWITCHES) @TCL_LIBS@
 
 # The symbol below provides support for dynamic loading and shared
 # libraries.  See configure.in for a description of what it means.
diff --git a/unix/configure b/unix/configure
index 1b71dd7..05c2721 100755
--- a/unix/configure
+++ b/unix/configure
@@ -308,7 +308,7 @@ ac_includes_default="\
 # include <unistd.h>
 #endif"
 
-ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS MKLINKS_FLAGS CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT CPP EGREP TCL_THREADS TCL_VERSION TCL_BIN_DIR TCL_SRC_DIR TCL_LIB_FILE TCL_LIB_FLAG TCL_LIB_SPEC TCL_STUB_LIB_FILE TCL_STUB_LIB_FLAG TCL_STUB_LIB_SPEC RANLIB ac_ct_RANLIB AR LIBOBJS DL_LIBS DL_OBJS PLAT_OBJS CFLAGS_DEBUG CFLAGS_OPTIMIZE CFLAGS_WARNING EXTRA_CFLAGS LDFLAGS_DEBUG LDFLAGS_OPTIMIZE CC_SEARCH_FLAGS LD_SEARCH_FLAGS STLIB_LD SHLIB_LD TCL_SHLIB_LD_EXTRAS TK_SHLIB_LD_EXTRAS SHLIB_LD_FLAGS SHLIB_LD_LIBS SHLIB_CFLAGS SHLIB_SUFFIX MAKE_LIB MAKE_STUB_LIB INSTALL_LIB INSTALL_STUB_LIB CFLAGS_DEFAULT LDFLAGS_DEFAULT TK_VERSION TK_MAJOR_VERSION TK_MINOR_VERSION TK_PATCH_LEVEL TK_DBGX TK_STUB_LIB_FILE TK_STUB_LIB_FLAG TK_BUILD_STUB_LIB_SPEC TK_STUB_LIB_SPEC TK_BUILD_STUB_LIB_PATH TK_STUB_LIB_PATH TK_STUB_FLAGS TK_BUILD_EXP_FILE TK_EXP_FILE TCL_STUB_FLAGS LD_LIBRARY_PATH_VAR MATH_LIBS TK_BUILD_LIB_SPEC TK_LIB_FILE TK_LIB_FLAG TK_LIB_SPEC TK_SRC_DIR XINCLUDES XLIBSW TK_SHARED_BUILD LOCALES LTLIBOBJS'
+ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS MKLINKS_FLAGS CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT CPP EGREP TCL_VERSION TCL_BIN_DIR TCL_SRC_DIR TCL_LIB_FILE TCL_LIB_FLAG TCL_LIB_SPEC TCL_STUB_LIB_FILE TCL_STUB_LIB_FLAG TCL_STUB_LIB_SPEC RANLIB ac_ct_RANLIB AR LIBOBJS TCL_LIBS DL_LIBS DL_OBJS PLAT_OBJS CFLAGS_DEBUG CFLAGS_OPTIMIZE CFLAGS_WARNING EXTRA_CFLAGS LDFLAGS_DEBUG LDFLAGS_OPTIMIZE CC_SEARCH_FLAGS LD_SEARCH_FLAGS STLIB_LD SHLIB_LD TCL_SHLIB_LD_EXTRAS TK_SHLIB_LD_EXTRAS SHLIB_LD_FLAGS SHLIB_LD_LIBS SHLIB_CFLAGS SHLIB_SUFFIX MAKE_LIB MAKE_STUB_LIB INSTALL_LIB INSTALL_STUB_LIB CFLAGS_DEFAULT LDFLAGS_DEFAULT TK_VERSION TK_MAJOR_VERSION TK_MINOR_VERSION TK_PATCH_LEVEL TK_DBGX TK_STUB_LIB_FILE TK_STUB_LIB_FLAG TK_BUILD_STUB_LIB_SPEC TK_STUB_LIB_SPEC TK_BUILD_STUB_LIB_PATH TK_STUB_LIB_PATH TK_STUB_FLAGS TK_BUILD_EXP_FILE TK_EXP_FILE TCL_STUB_FLAGS LD_LIBRARY_PATH_VAR TK_BUILD_LIB_SPEC TK_LIB_FILE TK_LIB_FLAG TK_LIB_SPEC TK_SRC_DIR XINCLUDES XLIBSW TK_SHARED_BUILD LOCALES LTLIBOBJS'
 ac_subst_files=''
 
 # Initialize some variables set by options.
@@ -846,7 +846,6 @@ Optional Features:
   --enable-man-symlinks   use symlinks for the manpages
   --enable-man-compression=PROG
                           compress the manpages with PROG
-  --enable-threads        build with threads
   --enable-shared         build and link with shared libraries --enable-shared
   --enable-64bit          enable 64bit support (where applicable)
   --enable-64bit-vis      enable 64bit Sparc VIS support
@@ -2835,554 +2834,6 @@ fi
 done
 
 
-#------------------------------------------------------------------------
-# Threads support
-#------------------------------------------------------------------------
-
-
-    echo "$as_me:$LINENO: checking for building with threads" >&5
-echo $ECHO_N "checking for building with threads... $ECHO_C" >&6
-    # Check whether --enable-threads or --disable-threads was given.
-if test "${enable_threads+set}" = set; then
-  enableval="$enable_threads"
-  tcl_ok=$enableval
-else
-  tcl_ok=no
-fi;
-
-    if test "$tcl_ok" = "yes"; then
-	echo "$as_me:$LINENO: result: yes" >&5
-echo "${ECHO_T}yes" >&6
-	TCL_THREADS=1
-	cat >>confdefs.h <<\_ACEOF
-#define TCL_THREADS 1
-_ACEOF
-
-	# USE_THREAD_ALLOC tells us to try the special thread-based
-	# allocator that significantly reduces lock contention
-	cat >>confdefs.h <<\_ACEOF
-#define USE_THREAD_ALLOC 1
-_ACEOF
-
-	cat >>confdefs.h <<\_ACEOF
-#define _REENTRANT 1
-_ACEOF
-
-	cat >>confdefs.h <<\_ACEOF
-#define _THREAD_SAFE 1
-_ACEOF
-
-	echo "$as_me:$LINENO: checking for pthread_mutex_init in -lpthread" >&5
-echo $ECHO_N "checking for pthread_mutex_init in -lpthread... $ECHO_C" >&6
-if test "${ac_cv_lib_pthread_pthread_mutex_init+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lpthread  $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char pthread_mutex_init ();
-int
-main ()
-{
-pthread_mutex_init ();
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_lib_pthread_pthread_mutex_init=yes
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-ac_cv_lib_pthread_pthread_mutex_init=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-echo "$as_me:$LINENO: result: $ac_cv_lib_pthread_pthread_mutex_init" >&5
-echo "${ECHO_T}$ac_cv_lib_pthread_pthread_mutex_init" >&6
-if test $ac_cv_lib_pthread_pthread_mutex_init = yes; then
-  tcl_ok=yes
-else
-  tcl_ok=no
-fi
-
-	if test "$tcl_ok" = "no"; then
-	    # Check a little harder for __pthread_mutex_init in the same
-	    # library, as some systems hide it there until pthread.h is
-	    # defined.  We could alternatively do an AC_TRY_COMPILE with
-	    # pthread.h, but that will work with libpthread really doesn't
-	    # exist, like AIX 4.2.  [Bug: 4359]
-	    echo "$as_me:$LINENO: checking for __pthread_mutex_init in -lpthread" >&5
-echo $ECHO_N "checking for __pthread_mutex_init in -lpthread... $ECHO_C" >&6
-if test "${ac_cv_lib_pthread___pthread_mutex_init+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lpthread  $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char __pthread_mutex_init ();
-int
-main ()
-{
-__pthread_mutex_init ();
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_lib_pthread___pthread_mutex_init=yes
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-ac_cv_lib_pthread___pthread_mutex_init=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-echo "$as_me:$LINENO: result: $ac_cv_lib_pthread___pthread_mutex_init" >&5
-echo "${ECHO_T}$ac_cv_lib_pthread___pthread_mutex_init" >&6
-if test $ac_cv_lib_pthread___pthread_mutex_init = yes; then
-  tcl_ok=yes
-else
-  tcl_ok=no
-fi
-
-	fi
-
-	if test "$tcl_ok" = "yes"; then
-	    # The space is needed
-	    THREADS_LIBS=" -lpthread"
-	else
-	    echo "$as_me:$LINENO: checking for pthread_mutex_init in -lpthreads" >&5
-echo $ECHO_N "checking for pthread_mutex_init in -lpthreads... $ECHO_C" >&6
-if test "${ac_cv_lib_pthreads_pthread_mutex_init+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lpthreads  $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char pthread_mutex_init ();
-int
-main ()
-{
-pthread_mutex_init ();
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_lib_pthreads_pthread_mutex_init=yes
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-ac_cv_lib_pthreads_pthread_mutex_init=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-echo "$as_me:$LINENO: result: $ac_cv_lib_pthreads_pthread_mutex_init" >&5
-echo "${ECHO_T}$ac_cv_lib_pthreads_pthread_mutex_init" >&6
-if test $ac_cv_lib_pthreads_pthread_mutex_init = yes; then
-  tcl_ok=yes
-else
-  tcl_ok=no
-fi
-
-	    if test "$tcl_ok" = "yes"; then
-		# The space is needed
-		THREADS_LIBS=" -lpthreads"
-	    else
-		echo "$as_me:$LINENO: checking for pthread_mutex_init in -lc" >&5
-echo $ECHO_N "checking for pthread_mutex_init in -lc... $ECHO_C" >&6
-if test "${ac_cv_lib_c_pthread_mutex_init+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lc  $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char pthread_mutex_init ();
-int
-main ()
-{
-pthread_mutex_init ();
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_lib_c_pthread_mutex_init=yes
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-ac_cv_lib_c_pthread_mutex_init=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-echo "$as_me:$LINENO: result: $ac_cv_lib_c_pthread_mutex_init" >&5
-echo "${ECHO_T}$ac_cv_lib_c_pthread_mutex_init" >&6
-if test $ac_cv_lib_c_pthread_mutex_init = yes; then
-  tcl_ok=yes
-else
-  tcl_ok=no
-fi
-
-	    	if test "$tcl_ok" = "no"; then
-		    echo "$as_me:$LINENO: checking for pthread_mutex_init in -lc_r" >&5
-echo $ECHO_N "checking for pthread_mutex_init in -lc_r... $ECHO_C" >&6
-if test "${ac_cv_lib_c_r_pthread_mutex_init+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lc_r  $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char pthread_mutex_init ();
-int
-main ()
-{
-pthread_mutex_init ();
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_lib_c_r_pthread_mutex_init=yes
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-ac_cv_lib_c_r_pthread_mutex_init=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-echo "$as_me:$LINENO: result: $ac_cv_lib_c_r_pthread_mutex_init" >&5
-echo "${ECHO_T}$ac_cv_lib_c_r_pthread_mutex_init" >&6
-if test $ac_cv_lib_c_r_pthread_mutex_init = yes; then
-  tcl_ok=yes
-else
-  tcl_ok=no
-fi
-
-		    if test "$tcl_ok" = "yes"; then
-			# The space is needed
-			THREADS_LIBS=" -pthread"
-		    else
-			TCL_THREADS=0
-			{ echo "$as_me:$LINENO: WARNING: \"Don t know how to find pthread lib on your system - you must disable thread support or edit the LIBS in the Makefile...\"" >&5
-echo "$as_me: WARNING: \"Don t know how to find pthread lib on your system - you must disable thread support or edit the LIBS in the Makefile...\"" >&2;}
-		    fi
-	    	fi
-	    fi
-	fi
-
-	# Does the pthread-implementation provide
-	# 'pthread_attr_setstacksize' ?
-
-	ac_saved_libs=$LIBS
-	LIBS="$LIBS $THREADS_LIBS"
-
-for ac_func in pthread_attr_setstacksize
-do
-as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
-echo "$as_me:$LINENO: checking for $ac_func" >&5
-echo $ECHO_N "checking for $ac_func... $ECHO_C" >&6
-if eval "test \"\${$as_ac_var+set}\" = set"; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-/* System header to define __stub macros and hopefully few prototypes,
-    which can conflict with char $ac_func (); below.
-    Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
-    <limits.h> exists even on freestanding compilers.  */
-#ifdef __STDC__
-# include <limits.h>
-#else
-# include <assert.h>
-#endif
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char $ac_func ();
-/* The GNU C library defines this for functions which it implements
-    to always fail with ENOSYS.  Some functions are actually named
-    something starting with __ and the normal name is an alias.  */
-#if defined (__stub_$ac_func) || defined (__stub___$ac_func)
-choke me
-#else
-char (*f) () = $ac_func;
-#endif
-#ifdef __cplusplus
-}
-#endif
-
-int
-main ()
-{
-return f != $ac_func;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  eval "$as_ac_var=yes"
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-eval "$as_ac_var=no"
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-fi
-echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_var'}'`" >&5
-echo "${ECHO_T}`eval echo '${'$as_ac_var'}'`" >&6
-if test `eval echo '${'$as_ac_var'}'` = yes; then
-  cat >>confdefs.h <<_ACEOF
-#define `echo "HAVE_$ac_func" | $as_tr_cpp` 1
-_ACEOF
-
-fi
-done
-
-	LIBS=$ac_saved_libs
-
-for ac_func in readdir_r
-do
-as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
-echo "$as_me:$LINENO: checking for $ac_func" >&5
-echo $ECHO_N "checking for $ac_func... $ECHO_C" >&6
-if eval "test \"\${$as_ac_var+set}\" = set"; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-/* System header to define __stub macros and hopefully few prototypes,
-    which can conflict with char $ac_func (); below.
-    Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
-    <limits.h> exists even on freestanding compilers.  */
-#ifdef __STDC__
-# include <limits.h>
-#else
-# include <assert.h>
-#endif
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char $ac_func ();
-/* The GNU C library defines this for functions which it implements
-    to always fail with ENOSYS.  Some functions are actually named
-    something starting with __ and the normal name is an alias.  */
-#if defined (__stub_$ac_func) || defined (__stub___$ac_func)
-choke me
-#else
-char (*f) () = $ac_func;
-#endif
-#ifdef __cplusplus
-}
-#endif
-
-int
-main ()
-{
-return f != $ac_func;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  eval "$as_ac_var=yes"
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-eval "$as_ac_var=no"
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-fi
-echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_var'}'`" >&5
-echo "${ECHO_T}`eval echo '${'$as_ac_var'}'`" >&6
-if test `eval echo '${'$as_ac_var'}'` = yes; then
-  cat >>confdefs.h <<_ACEOF
-#define `echo "HAVE_$ac_func" | $as_tr_cpp` 1
-_ACEOF
-
-fi
-done
-
-    else
-	TCL_THREADS=0
-	echo "$as_me:$LINENO: result: no (default)" >&5
-echo "${ECHO_T}no (default)" >&6
-    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.)
@@ -4036,6 +3487,28 @@ echo "${ECHO_T}file not found" >&6
 
 
 
+#------------------------------------------------------------------------
+# Threads support
+#------------------------------------------------------------------------
+
+
+if test "${TCL_THREADS}" = 1; then
+    # FIXME: It seems like these defines should be covered by
+    # the TCL_DEFS entry in tclConfig.sh. Why are they not?
+    cat >>confdefs.h <<\_ACEOF
+#define TCL_THREADS 1
+_ACEOF
+
+    cat >>confdefs.h <<\_ACEOF
+#define _REENTRANT 1
+_ACEOF
+
+    cat >>confdefs.h <<\_ACEOF
+#define _THREAD_SAFE 1
+_ACEOF
+
+fi
+
 #--------------------------------------------------------------------
 # Recompute the necessary flags to run the compiler
 #--------------------------------------------------------------------
@@ -6128,7 +5601,18 @@ fi;
         INSTALL_STUB_LIB='$(INSTALL_LIBRARY) $(STUB_LIB_FILE) $(LIB_INSTALL_DIR)/$(STUB_LIB_FILE) ; (cd $(LIB_INSTALL_DIR) ; $(RANLIB) $(STUB_LIB_FILE))'
     fi
 
+    # Define TCL_LIBS now that we know what DL_LIBS is.
+    # The trick here is that we don't want to change
+    # the value of TCL_LIBS if it is already set when
+    # tclConfig.sh had been loaded by Tk.
+    if test "x${TCL_LIBS}" = "x"; then
+        TCL_LIBS="${DL_LIBS} ${LIBS} ${MATH_LIBS}"
+    fi
+
 
+    # FIXME: This subst was left in only because the TCL_DL_LIBS
+    # entry in tclConfig.sh uses it. It is not clear why someone
+    # would use TCL_DL_LIBS instead of TCL_LIBS.
 
 
 
@@ -6233,216 +5717,6 @@ if test "$TCL_EXEC_PREFIX" != "$exec_prefix"; then
 fi
 
 #--------------------------------------------------------------------
-# On a few very rare systems, all of the libm.a stuff is
-# already in libc.a.  Set compiler flags accordingly.
-# Also, Linux requires the "ieee" library for math to work
-# right (and it must appear before "-lm").
-#--------------------------------------------------------------------
-
-echo "$as_me:$LINENO: checking for sin" >&5
-echo $ECHO_N "checking for sin... $ECHO_C" >&6
-if test "${ac_cv_func_sin+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-/* System header to define __stub macros and hopefully few prototypes,
-    which can conflict with char sin (); below.
-    Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
-    <limits.h> exists even on freestanding compilers.  */
-#ifdef __STDC__
-# include <limits.h>
-#else
-# include <assert.h>
-#endif
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char sin ();
-/* The GNU C library defines this for functions which it implements
-    to always fail with ENOSYS.  Some functions are actually named
-    something starting with __ and the normal name is an alias.  */
-#if defined (__stub_sin) || defined (__stub___sin)
-choke me
-#else
-char (*f) () = sin;
-#endif
-#ifdef __cplusplus
-}
-#endif
-
-int
-main ()
-{
-return f != sin;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_func_sin=yes
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-ac_cv_func_sin=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-fi
-echo "$as_me:$LINENO: result: $ac_cv_func_sin" >&5
-echo "${ECHO_T}$ac_cv_func_sin" >&6
-if test $ac_cv_func_sin = yes; then
-  MATH_LIBS=""
-else
-  MATH_LIBS="-lm"
-fi
-
-echo "$as_me:$LINENO: checking for main in -lieee" >&5
-echo $ECHO_N "checking for main in -lieee... $ECHO_C" >&6
-if test "${ac_cv_lib_ieee_main+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lieee  $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-
-
-int
-main ()
-{
-main ();
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_lib_ieee_main=yes
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-ac_cv_lib_ieee_main=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-echo "$as_me:$LINENO: result: $ac_cv_lib_ieee_main" >&5
-echo "${ECHO_T}$ac_cv_lib_ieee_main" >&6
-if test $ac_cv_lib_ieee_main = yes; then
-  MATH_LIBS="-lieee $MATH_LIBS"
-fi
-
-
-#--------------------------------------------------------------------
-# On AIX systems, libbsd.a has to be linked in to support
-# non-blocking file IO.  This library has to be linked in after
-# the MATH_LIBS or it breaks the pow() function.  The way to
-# insure proper sequencing, is to add it to the tail of MATH_LIBS.
-# This library also supplies gettimeofday.
-#--------------------------------------------------------------------
-libbsd=no
-if test "`uname -s`" = "AIX" ; then
-    echo "$as_me:$LINENO: checking for gettimeofday in -lbsd" >&5
-echo $ECHO_N "checking for gettimeofday in -lbsd... $ECHO_C" >&6
-if test "${ac_cv_lib_bsd_gettimeofday+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lbsd  $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char gettimeofday ();
-int
-main ()
-{
-gettimeofday ();
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_lib_bsd_gettimeofday=yes
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-ac_cv_lib_bsd_gettimeofday=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-echo "$as_me:$LINENO: result: $ac_cv_lib_bsd_gettimeofday" >&5
-echo "${ECHO_T}$ac_cv_lib_bsd_gettimeofday" >&6
-if test $ac_cv_lib_bsd_gettimeofday = yes; then
-  libbsd=yes
-fi
-
-    if test $libbsd = yes; then
-	MATH_LIBS="$MATH_LIBS -lbsd"
-    fi
-fi
-
-#--------------------------------------------------------------------
 # Supply a substitute for stdlib.h if it doesn't define strtol,
 # strtoul, or strtod (which it doesn't in some versions of SunOS).
 #--------------------------------------------------------------------
@@ -7588,357 +6862,6 @@ if test $ac_cv_lib_Xbsd_main = yes; then
 fi
 
 
-tk_checkBoth=0
-echo "$as_me:$LINENO: checking for connect" >&5
-echo $ECHO_N "checking for connect... $ECHO_C" >&6
-if test "${ac_cv_func_connect+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-/* System header to define __stub macros and hopefully few prototypes,
-    which can conflict with char connect (); below.
-    Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
-    <limits.h> exists even on freestanding compilers.  */
-#ifdef __STDC__
-# include <limits.h>
-#else
-# include <assert.h>
-#endif
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char connect ();
-/* The GNU C library defines this for functions which it implements
-    to always fail with ENOSYS.  Some functions are actually named
-    something starting with __ and the normal name is an alias.  */
-#if defined (__stub_connect) || defined (__stub___connect)
-choke me
-#else
-char (*f) () = connect;
-#endif
-#ifdef __cplusplus
-}
-#endif
-
-int
-main ()
-{
-return f != connect;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_func_connect=yes
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-ac_cv_func_connect=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-fi
-echo "$as_me:$LINENO: result: $ac_cv_func_connect" >&5
-echo "${ECHO_T}$ac_cv_func_connect" >&6
-if test $ac_cv_func_connect = yes; then
-  tk_checkSocket=0
-else
-  tk_checkSocket=1
-fi
-
-if test "$tk_checkSocket" = 1; then
-    echo "$as_me:$LINENO: checking for main in -lsocket" >&5
-echo $ECHO_N "checking for main in -lsocket... $ECHO_C" >&6
-if test "${ac_cv_lib_socket_main+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lsocket  $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-
-
-int
-main ()
-{
-main ();
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_lib_socket_main=yes
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-ac_cv_lib_socket_main=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-echo "$as_me:$LINENO: result: $ac_cv_lib_socket_main" >&5
-echo "${ECHO_T}$ac_cv_lib_socket_main" >&6
-if test $ac_cv_lib_socket_main = yes; then
-  LIBS="$LIBS -lsocket"
-else
-  tk_checkBoth=1
-fi
-
-fi
-if test "$tk_checkBoth" = 1; then
-    tk_oldLibs=$LIBS
-    LIBS="$LIBS -lsocket -lnsl"
-    echo "$as_me:$LINENO: checking for accept" >&5
-echo $ECHO_N "checking for accept... $ECHO_C" >&6
-if test "${ac_cv_func_accept+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-/* System header to define __stub macros and hopefully few prototypes,
-    which can conflict with char accept (); below.
-    Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
-    <limits.h> exists even on freestanding compilers.  */
-#ifdef __STDC__
-# include <limits.h>
-#else
-# include <assert.h>
-#endif
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char accept ();
-/* The GNU C library defines this for functions which it implements
-    to always fail with ENOSYS.  Some functions are actually named
-    something starting with __ and the normal name is an alias.  */
-#if defined (__stub_accept) || defined (__stub___accept)
-choke me
-#else
-char (*f) () = accept;
-#endif
-#ifdef __cplusplus
-}
-#endif
-
-int
-main ()
-{
-return f != accept;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_func_accept=yes
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-ac_cv_func_accept=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-fi
-echo "$as_me:$LINENO: result: $ac_cv_func_accept" >&5
-echo "${ECHO_T}$ac_cv_func_accept" >&6
-if test $ac_cv_func_accept = yes; then
-  tk_checkNsl=0
-else
-  LIBS=$tk_oldLibs
-fi
-
-fi
-echo "$as_me:$LINENO: checking for gethostbyname" >&5
-echo $ECHO_N "checking for gethostbyname... $ECHO_C" >&6
-if test "${ac_cv_func_gethostbyname+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-/* System header to define __stub macros and hopefully few prototypes,
-    which can conflict with char gethostbyname (); below.
-    Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
-    <limits.h> exists even on freestanding compilers.  */
-#ifdef __STDC__
-# include <limits.h>
-#else
-# include <assert.h>
-#endif
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char gethostbyname ();
-/* The GNU C library defines this for functions which it implements
-    to always fail with ENOSYS.  Some functions are actually named
-    something starting with __ and the normal name is an alias.  */
-#if defined (__stub_gethostbyname) || defined (__stub___gethostbyname)
-choke me
-#else
-char (*f) () = gethostbyname;
-#endif
-#ifdef __cplusplus
-}
-#endif
-
-int
-main ()
-{
-return f != gethostbyname;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_func_gethostbyname=yes
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-ac_cv_func_gethostbyname=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-fi
-echo "$as_me:$LINENO: result: $ac_cv_func_gethostbyname" >&5
-echo "${ECHO_T}$ac_cv_func_gethostbyname" >&6
-if test $ac_cv_func_gethostbyname = yes; then
-  :
-else
-  echo "$as_me:$LINENO: checking for main in -lnsl" >&5
-echo $ECHO_N "checking for main in -lnsl... $ECHO_C" >&6
-if test "${ac_cv_lib_nsl_main+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lnsl  $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-
-
-int
-main ()
-{
-main ();
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_lib_nsl_main=yes
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-ac_cv_lib_nsl_main=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-echo "$as_me:$LINENO: result: $ac_cv_lib_nsl_main" >&5
-echo "${ECHO_T}$ac_cv_lib_nsl_main" >&6
-if test $ac_cv_lib_nsl_main = yes; then
-  LIBS="$LIBS -lnsl"
-fi
-
-fi
-
-
-# Add the threads support libraries
-
-LIBS="$LIBS$THREADS_LIBS"
-
 #--------------------------------------------------------------------
 # One more check related to the X libraries.  The standard releases
 # of Ultrix don't support the "xauth" mechanism, so send won't work
@@ -8008,145 +6931,6 @@ rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
 fi
 
 #--------------------------------------------------------------------
-#	On a few very rare systems, all of the libm.a stuff is
-#	already in libc.a.  Set compiler flags accordingly.
-#	Also, Linux requires the "ieee" library for math to
-#	work right (and it must appear before "-lm").
-#--------------------------------------------------------------------
-
-MATH_LIBS=""
-echo "$as_me:$LINENO: checking for sin" >&5
-echo $ECHO_N "checking for sin... $ECHO_C" >&6
-if test "${ac_cv_func_sin+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-/* System header to define __stub macros and hopefully few prototypes,
-    which can conflict with char sin (); below.
-    Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
-    <limits.h> exists even on freestanding compilers.  */
-#ifdef __STDC__
-# include <limits.h>
-#else
-# include <assert.h>
-#endif
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char sin ();
-/* The GNU C library defines this for functions which it implements
-    to always fail with ENOSYS.  Some functions are actually named
-    something starting with __ and the normal name is an alias.  */
-#if defined (__stub_sin) || defined (__stub___sin)
-choke me
-#else
-char (*f) () = sin;
-#endif
-#ifdef __cplusplus
-}
-#endif
-
-int
-main ()
-{
-return f != sin;
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_func_sin=yes
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-ac_cv_func_sin=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-fi
-echo "$as_me:$LINENO: result: $ac_cv_func_sin" >&5
-echo "${ECHO_T}$ac_cv_func_sin" >&6
-if test $ac_cv_func_sin = yes; then
-  :
-else
-  MATH_LIBS="-lm"
-fi
-
-echo "$as_me:$LINENO: checking for main in -lieee" >&5
-echo $ECHO_N "checking for main in -lieee... $ECHO_C" >&6
-if test "${ac_cv_lib_ieee_main+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lieee  $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-
-
-int
-main ()
-{
-main ();
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_lib_ieee_main=yes
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-ac_cv_lib_ieee_main=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-echo "$as_me:$LINENO: result: $ac_cv_lib_ieee_main" >&5
-echo "${ECHO_T}$ac_cv_lib_ieee_main" >&6
-if test $ac_cv_lib_ieee_main = yes; then
-  MATH_LIBS="-lieee $MATH_LIBS"
-fi
-
-
-#--------------------------------------------------------------------
 #	Figure out whether "char" is unsigned.  If so, set a
 #	#define for __CHAR_UNSIGNED__.
 #--------------------------------------------------------------------
@@ -8473,7 +7257,6 @@ eval "TK_LIB_FILE=${TK_LIB_FILE}"
 
 
 
-
                     ac_config_files="$ac_config_files Makefile tkConfig.sh"
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
@@ -9119,7 +7902,6 @@ s,@EXEEXT@,$EXEEXT,;t t
 s,@OBJEXT@,$OBJEXT,;t t
 s,@CPP@,$CPP,;t t
 s,@EGREP@,$EGREP,;t t
-s,@TCL_THREADS@,$TCL_THREADS,;t t
 s,@TCL_VERSION@,$TCL_VERSION,;t t
 s,@TCL_BIN_DIR@,$TCL_BIN_DIR,;t t
 s,@TCL_SRC_DIR@,$TCL_SRC_DIR,;t t
@@ -9133,6 +7915,7 @@ s,@RANLIB@,$RANLIB,;t t
 s,@ac_ct_RANLIB@,$ac_ct_RANLIB,;t t
 s,@AR@,$AR,;t t
 s,@LIBOBJS@,$LIBOBJS,;t t
+s,@TCL_LIBS@,$TCL_LIBS,;t t
 s,@DL_LIBS@,$DL_LIBS,;t t
 s,@DL_OBJS@,$DL_OBJS,;t t
 s,@PLAT_OBJS@,$PLAT_OBJS,;t t
@@ -9174,7 +7957,6 @@ s,@TK_BUILD_EXP_FILE@,$TK_BUILD_EXP_FILE,;t t
 s,@TK_EXP_FILE@,$TK_EXP_FILE,;t t
 s,@TCL_STUB_FLAGS@,$TCL_STUB_FLAGS,;t t
 s,@LD_LIBRARY_PATH_VAR@,$LD_LIBRARY_PATH_VAR,;t t
-s,@MATH_LIBS@,$MATH_LIBS,;t t
 s,@TK_BUILD_LIB_SPEC@,$TK_BUILD_LIB_SPEC,;t t
 s,@TK_LIB_FILE@,$TK_LIB_FILE,;t t
 s,@TK_LIB_FLAG@,$TK_LIB_FLAG,;t t
diff --git a/unix/configure.in b/unix/configure.in
index b8d33c4..01feb46 100644
--- a/unix/configure.in
+++ b/unix/configure.in
@@ -3,7 +3,7 @@ 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.
 #
-# RCS: @(#) $Id: configure.in,v 1.85 2003/03/13 10:54:49 mdejong Exp $
+# RCS: @(#) $Id: configure.in,v 1.86 2003/04/04 19:29:48 mdejong Exp $
 
 AC_INIT(../generic/tk.h)
 AC_PREREQ(2.57)
@@ -54,12 +54,6 @@ AC_PROG_CC
 
 AC_HAVE_HEADERS(unistd.h limits.h)
 
-#------------------------------------------------------------------------
-# Threads support
-#------------------------------------------------------------------------
-
-SC_ENABLE_THREADS
-
 #------------------------------------------------------------------------------
 # 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.)
@@ -92,6 +86,22 @@ SC_TCL_64BIT_FLAGS
 SC_PATH_TCLCONFIG
 SC_LOAD_TCLCONFIG
 
+#------------------------------------------------------------------------
+# Threads support
+#------------------------------------------------------------------------
+
+dnl Removed call to SC_ENABLE_THREADS since Tk needs to use
+dnl the thread configuration provided by Tcl.
+dnl SC_ENABLE_THREADS
+
+if test "${TCL_THREADS}" = 1; then
+    # FIXME: It seems like these defines should be covered by
+    # the TCL_DEFS entry in tclConfig.sh. Why are they not?
+    AC_DEFINE(TCL_THREADS)
+    AC_DEFINE(_REENTRANT)
+    AC_DEFINE(_THREAD_SAFE)
+fi
+
 #--------------------------------------------------------------------
 # Recompute the necessary flags to run the compiler
 #--------------------------------------------------------------------
@@ -116,31 +126,6 @@ if test "$TCL_EXEC_PREFIX" != "$exec_prefix"; then
 fi
 
 #--------------------------------------------------------------------
-# On a few very rare systems, all of the libm.a stuff is
-# already in libc.a.  Set compiler flags accordingly.
-# Also, Linux requires the "ieee" library for math to work
-# right (and it must appear before "-lm").
-#--------------------------------------------------------------------
-
-AC_CHECK_FUNC(sin, MATH_LIBS="", MATH_LIBS="-lm")
-AC_CHECK_LIB(ieee, main, [MATH_LIBS="-lieee $MATH_LIBS"])
-
-#--------------------------------------------------------------------
-# On AIX systems, libbsd.a has to be linked in to support
-# non-blocking file IO.  This library has to be linked in after
-# the MATH_LIBS or it breaks the pow() function.  The way to
-# insure proper sequencing, is to add it to the tail of MATH_LIBS.
-# This library also supplies gettimeofday.
-#--------------------------------------------------------------------
-libbsd=no
-if test "`uname -s`" = "AIX" ; then
-    AC_CHECK_LIB(bsd, gettimeofday, libbsd=yes)
-    if test $libbsd = yes; then
-	MATH_LIBS="$MATH_LIBS -lbsd"
-    fi
-fi
-
-#--------------------------------------------------------------------
 # Supply a substitute for stdlib.h if it doesn't define strtol,
 # strtoul, or strtod (which it doesn't in some versions of SunOS).
 #--------------------------------------------------------------------
@@ -266,22 +251,6 @@ eval "LD_SEARCH_FLAGS=\"$TCL_LD_SEARCH_FLAGS\""
 
 AC_CHECK_LIB(Xbsd, main, [LIBS="$LIBS -lXbsd"])
 
-tk_checkBoth=0
-AC_CHECK_FUNC(connect, tk_checkSocket=0, tk_checkSocket=1)
-if test "$tk_checkSocket" = 1; then
-    AC_CHECK_LIB(socket, main, LIBS="$LIBS -lsocket", tk_checkBoth=1)
-fi
-if test "$tk_checkBoth" = 1; then
-    tk_oldLibs=$LIBS
-    LIBS="$LIBS -lsocket -lnsl"
-    AC_CHECK_FUNC(accept, tk_checkNsl=0, [LIBS=$tk_oldLibs])
-fi
-AC_CHECK_FUNC(gethostbyname, , [AC_CHECK_LIB(nsl, main, [LIBS="$LIBS -lnsl"])])
-
-# Add the threads support libraries
-
-LIBS="$LIBS$THREADS_LIBS"
-
 #--------------------------------------------------------------------
 # One more check related to the X libraries.  The standard releases
 # of Ultrix don't support the "xauth" mechanism, so send won't work
@@ -313,17 +282,6 @@ if test -d /usr/include/mit ; then
 fi
 
 #--------------------------------------------------------------------
-#	On a few very rare systems, all of the libm.a stuff is
-#	already in libc.a.  Set compiler flags accordingly.
-#	Also, Linux requires the "ieee" library for math to
-#	work right (and it must appear before "-lm").
-#--------------------------------------------------------------------
-
-MATH_LIBS=""
-AC_CHECK_FUNC(sin, , MATH_LIBS="-lm")
-AC_CHECK_LIB(ieee, main, [MATH_LIBS="-lieee $MATH_LIBS"])
-
-#--------------------------------------------------------------------
 #	Figure out whether "char" is unsigned.  If so, set a
 #	#define for __CHAR_UNSIGNED__.
 #--------------------------------------------------------------------
@@ -432,7 +390,6 @@ AC_SUBST(TK_EXP_FILE)
 
 AC_SUBST(LD_LIBRARY_PATH_VAR)
 
-AC_SUBST(MATH_LIBS)
 AC_SUBST(TK_BUILD_LIB_SPEC)
 AC_SUBST(TK_LIB_FILE)
 AC_SUBST(TK_LIB_FLAG)
diff --git a/unix/tcl.m4 b/unix/tcl.m4
index 10f9a06..88eaa56 100644
--- a/unix/tcl.m4
+++ b/unix/tcl.m4
@@ -705,6 +705,9 @@ AC_DEFUN(SC_CONFIG_MANPAGES, [
 #                       The name of the built export / import file which
 #                       should be used to link to the Tcl shared library.
 #                       Empty if Tcl is unshared.
+#       TCL_LIBS -
+#                       Libs to use when linking Tcl shell or some other
+#                       shell that includes Tcl libs.
 #	CFLAGS_DEBUG -
 #			Flags used when running the compiler in debug mode
 #	CFLAGS_OPTIMIZE -
@@ -1739,7 +1742,18 @@ dnl        esac
         INSTALL_STUB_LIB='$(INSTALL_LIBRARY) $(STUB_LIB_FILE) $(LIB_INSTALL_DIR)/$(STUB_LIB_FILE) ; (cd $(LIB_INSTALL_DIR) ; $(RANLIB) $(STUB_LIB_FILE))'
     fi
 
+    # Define TCL_LIBS now that we know what DL_LIBS is.
+    # The trick here is that we don't want to change
+    # the value of TCL_LIBS if it is already set when
+    # tclConfig.sh had been loaded by Tk.
+    if test "x${TCL_LIBS}" = "x"; then
+        TCL_LIBS="${DL_LIBS} ${LIBS} ${MATH_LIBS}"
+    fi
+    AC_SUBST(TCL_LIBS)
 
+    # FIXME: This subst was left in only because the TCL_DL_LIBS
+    # entry in tclConfig.sh uses it. It is not clear why someone
+    # would use TCL_DL_LIBS instead of TCL_LIBS.
     AC_SUBST(DL_LIBS)
 
     AC_SUBST(DL_OBJS)
@@ -2274,19 +2288,13 @@ AC_DEFUN(SC_BUGGY_STRTOD, [
 #	-lnsl) are dealt with here.
 #
 # Arguments:
-#	Requires the following vars to be set in the Makefile:
-#		DL_LIBS
-#		LIBS
-#		MATH_LIBS
+#	None.
 #	
 # Results:
 #
-#	Subst's the following var:
-#		TCL_LIBS
-#		MATH_LIBS
-#
 #	Might append to the following vars:
 #		LIBS
+#		MATH_LIBS
 #
 #	Might define the following vars:
 #		HAVE_NET_ERRNO_H
@@ -2343,13 +2351,6 @@ AC_DEFUN(SC_TCL_LINK_LIBS, [
     fi
     AC_CHECK_FUNC(gethostbyname, , [AC_CHECK_LIB(nsl, gethostbyname,
 	    [LIBS="$LIBS -lnsl"])])
-
-    # Don't perform the eval of the libraries here because DL_LIBS
-    # won't be set until we call SC_CONFIG_CFLAGS
-
-    TCL_LIBS='${DL_LIBS} ${LIBS} ${MATH_LIBS}'
-    AC_SUBST(TCL_LIBS)
-    AC_SUBST(MATH_LIBS)
 ])
 
 #--------------------------------------------------------------------
diff --git a/unix/tkConfig.sh.in b/unix/tkConfig.sh.in
index f8d43f1..735adba 100644
--- a/unix/tkConfig.sh.in
+++ b/unix/tkConfig.sh.in
@@ -11,7 +11,7 @@
 #
 # The information in this file is specific to a single platform.
 #
-# RCS: @(#) $Id: tkConfig.sh.in,v 1.8 2002/07/28 03:23:08 mdejong Exp $
+# RCS: @(#) $Id: tkConfig.sh.in,v 1.9 2003/04/04 19:29:51 mdejong Exp $
 
 # Tk's version number.
 TK_VERSION='@TK_VERSION@'
@@ -32,7 +32,7 @@ TK_DBGX=@TK_DBGX@
 TK_LIB_FILE='@TK_LIB_FILE@'
 
 # Additional libraries to use when linking Tk.
-TK_LIBS='@XLIBSW@ @DL_LIBS@ @LIBS@ @MATH_LIBS@'
+TK_LIBS='@XLIBSW@ @LIBS@ @TCL_LIBS@'
 
 # Top-level directory in which Tcl's platform-independent files are
 # installed.