Changes to support re-entrant coding of gmtime and localtime.

(Bugs #219136 and #232558)

3 files changed, 363 insertions, 169 deletions

diff --git a/unix/configure b/unix/configure
index 835273a..38942b3 100755
--- a/unix/configure
+++ b/unix/configure
@@ -2670,17 +2670,73 @@ EOF
 fi
 
 
+    for ac_func in gmtime_r localtime_r
+do
+echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
+echo "configure:2677: checking for $ac_func" >&5
+if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  cat > conftest.$ac_ext <<EOF
+#line 2682 "configure"
+#include "confdefs.h"
+/* System header to define __stub macros and hopefully few prototypes,
+    which can conflict with char $ac_func(); below.  */
+#include <assert.h>
+/* Override any gcc2 internal prototype to avoid an error.  */
+/* We use char because int might match the return type of a gcc2
+    builtin and then its argument prototype would still apply.  */
+char $ac_func();
+
+int main() {
+
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined (__stub_$ac_func) || defined (__stub___$ac_func)
+choke me
+#else
+$ac_func();
+#endif
+
+; return 0; }
+EOF
+if { (eval echo configure:2705: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+  rm -rf conftest*
+  eval "ac_cv_func_$ac_func=yes"
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  eval "ac_cv_func_$ac_func=no"
+fi
+rm -f conftest*
+fi
+
+if eval "test \"`echo '$ac_cv_func_'$ac_func`\" = yes"; then
+  echo "$ac_t""yes" 1>&6
+    ac_tr_func=HAVE_`echo $ac_func | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
+  cat >> confdefs.h <<EOF
+#define $ac_tr_func 1
+EOF
+ 
+else
+  echo "$ac_t""no" 1>&6
+fi
+done
+
+
     echo $ac_n "checking tm_tzadj in struct tm""... $ac_c" 1>&6
-echo "configure:2675: checking tm_tzadj in struct tm" >&5
+echo "configure:2731: checking tm_tzadj in struct tm" >&5
     cat > conftest.$ac_ext <<EOF
-#line 2677 "configure"
+#line 2733 "configure"
 #include "confdefs.h"
 #include <time.h>
 int main() {
 struct tm tm; tm.tm_tzadj;
 ; return 0; }
 EOF
-if { (eval echo configure:2684: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:2740: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   cat >> confdefs.h <<\EOF
 #define HAVE_TM_TZADJ 1
@@ -2696,16 +2752,16 @@ fi
 rm -f conftest*
 
     echo $ac_n "checking tm_gmtoff in struct tm""... $ac_c" 1>&6
-echo "configure:2700: checking tm_gmtoff in struct tm" >&5
+echo "configure:2756: checking tm_gmtoff in struct tm" >&5
     cat > conftest.$ac_ext <<EOF
-#line 2702 "configure"
+#line 2758 "configure"
 #include "confdefs.h"
 #include <time.h>
 int main() {
 struct tm tm; tm.tm_gmtoff;
 ; return 0; }
 EOF
-if { (eval echo configure:2709: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:2765: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   cat >> confdefs.h <<\EOF
 #define HAVE_TM_GMTOFF 1
@@ -2726,9 +2782,9 @@ rm -f conftest*
     #
     have_timezone=no
     echo $ac_n "checking long timezone variable""... $ac_c" 1>&6
-echo "configure:2730: checking long timezone variable" >&5
+echo "configure:2786: checking long timezone variable" >&5
     cat > conftest.$ac_ext <<EOF
-#line 2732 "configure"
+#line 2788 "configure"
 #include "confdefs.h"
 #include <time.h>
 int main() {
@@ -2737,7 +2793,7 @@ extern long timezone;
 	    exit (0);
 ; return 0; }
 EOF
-if { (eval echo configure:2741: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:2797: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   have_timezone=yes
 	    cat >> confdefs.h <<\EOF
@@ -2758,9 +2814,9 @@ rm -f conftest*
     #
     if test "$have_timezone" = no; then
     echo $ac_n "checking time_t timezone variable""... $ac_c" 1>&6
-echo "configure:2762: checking time_t timezone variable" >&5
+echo "configure:2818: checking time_t timezone variable" >&5
     cat > conftest.$ac_ext <<EOF
-#line 2764 "configure"
+#line 2820 "configure"
 #include "confdefs.h"
 #include <time.h>
 int main() {
@@ -2769,7 +2825,7 @@ extern time_t timezone;
 	    exit (0);
 ; return 0; }
 EOF
-if { (eval echo configure:2773: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:2829: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   cat >> confdefs.h <<\EOF
 #define HAVE_TIMEZONE_VAR 1
@@ -2792,12 +2848,12 @@ rm -f conftest*
 #	in struct stat.  But we might be able to use fstatfs instead.
 #--------------------------------------------------------------------
 echo $ac_n "checking for st_blksize in struct stat""... $ac_c" 1>&6
-echo "configure:2796: checking for st_blksize in struct stat" >&5
+echo "configure:2852: checking for st_blksize in struct stat" >&5
 if eval "test \"`echo '$''{'ac_cv_struct_st_blksize'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 2801 "configure"
+#line 2857 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -2805,7 +2861,7 @@ int main() {
 struct stat s; s.st_blksize;
 ; return 0; }
 EOF
-if { (eval echo configure:2809: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:2865: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_struct_st_blksize=yes
 else
@@ -2826,12 +2882,12 @@ EOF
 fi
 
 echo $ac_n "checking for fstatfs""... $ac_c" 1>&6
-echo "configure:2830: checking for fstatfs" >&5
+echo "configure:2886: checking for fstatfs" >&5
 if eval "test \"`echo '$''{'ac_cv_func_fstatfs'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 2835 "configure"
+#line 2891 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char fstatfs(); below.  */
@@ -2854,7 +2910,7 @@ fstatfs();
 
 ; return 0; }
 EOF
-if { (eval echo configure:2858: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:2914: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_fstatfs=yes"
 else
@@ -2883,7 +2939,7 @@ fi
 #       data, this checks it and add memcmp.o to LIBOBJS if needed
 #--------------------------------------------------------------------
 echo $ac_n "checking for 8-bit clean memcmp""... $ac_c" 1>&6
-echo "configure:2887: checking for 8-bit clean memcmp" >&5
+echo "configure:2943: checking for 8-bit clean memcmp" >&5
 if eval "test \"`echo '$''{'ac_cv_func_memcmp_clean'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -2891,7 +2947,7 @@ else
   ac_cv_func_memcmp_clean=no
 else
   cat > conftest.$ac_ext <<EOF
-#line 2895 "configure"
+#line 2951 "configure"
 #include "confdefs.h"
 
 main()
@@ -2901,7 +2957,7 @@ main()
 }
 
 EOF
-if { (eval echo configure:2905: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:2961: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   ac_cv_func_memcmp_clean=yes
 else
@@ -2925,12 +2981,12 @@ test $ac_cv_func_memcmp_clean = no && LIBOBJS="$LIBOBJS memcmp.${ac_objext}"
 #       {The replacement define is in compat/string.h}
 #--------------------------------------------------------------------
 echo $ac_n "checking for memmove""... $ac_c" 1>&6
-echo "configure:2929: checking for memmove" >&5
+echo "configure:2985: checking for memmove" >&5
 if eval "test \"`echo '$''{'ac_cv_func_memmove'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 2934 "configure"
+#line 2990 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char memmove(); below.  */
@@ -2953,7 +3009,7 @@ memmove();
 
 ; return 0; }
 EOF
-if { (eval echo configure:2957: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3013: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_memmove=yes"
 else
@@ -2986,12 +3042,12 @@ fi
 #--------------------------------------------------------------------
 
 echo $ac_n "checking proper strstr implementation""... $ac_c" 1>&6
-echo "configure:2990: checking proper strstr implementation" >&5
+echo "configure:3046: checking proper strstr implementation" >&5
 if test "$cross_compiling" = yes; then
   tcl_ok=no
 else
   cat > conftest.$ac_ext <<EOF
-#line 2995 "configure"
+#line 3051 "configure"
 #include "confdefs.h"
 
 extern int strstr();
@@ -3001,7 +3057,7 @@ int main()
 }
 
 EOF
-if { (eval echo configure:3005: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:3061: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   tcl_ok=yes
 else
@@ -3027,12 +3083,12 @@ fi
 #--------------------------------------------------------------------
 
 echo $ac_n "checking for strtoul""... $ac_c" 1>&6
-echo "configure:3031: checking for strtoul" >&5
+echo "configure:3087: checking for strtoul" >&5
 if eval "test \"`echo '$''{'ac_cv_func_strtoul'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3036 "configure"
+#line 3092 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char strtoul(); below.  */
@@ -3055,7 +3111,7 @@ strtoul();
 
 ; return 0; }
 EOF
-if { (eval echo configure:3059: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3115: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_strtoul=yes"
 else
@@ -3079,7 +3135,7 @@ if test "$cross_compiling" = yes; then
   tcl_ok=0
 else
   cat > conftest.$ac_ext <<EOF
-#line 3083 "configure"
+#line 3139 "configure"
 #include "confdefs.h"
 
 extern int strtoul();
@@ -3095,7 +3151,7 @@ int main()
     exit(0);
 }
 EOF
-if { (eval echo configure:3099: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:3155: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   :
 else
@@ -3118,12 +3174,12 @@ fi
 #--------------------------------------------------------------------
 
 echo $ac_n "checking for strtod""... $ac_c" 1>&6
-echo "configure:3122: checking for strtod" >&5
+echo "configure:3178: checking for strtod" >&5
 if eval "test \"`echo '$''{'ac_cv_func_strtod'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3127 "configure"
+#line 3183 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char strtod(); below.  */
@@ -3146,7 +3202,7 @@ strtod();
 
 ; return 0; }
 EOF
-if { (eval echo configure:3150: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3206: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_strtod=yes"
 else
@@ -3170,7 +3226,7 @@ if test "$cross_compiling" = yes; then
   tcl_ok=0
 else
   cat > conftest.$ac_ext <<EOF
-#line 3174 "configure"
+#line 3230 "configure"
 #include "confdefs.h"
 
 extern double strtod();
@@ -3186,7 +3242,7 @@ int main()
     exit(0);
 }
 EOF
-if { (eval echo configure:3190: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:3246: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   :
 else
@@ -3212,12 +3268,12 @@ fi
 
 
     echo $ac_n "checking for strtod""... $ac_c" 1>&6
-echo "configure:3216: checking for strtod" >&5
+echo "configure:3272: checking for strtod" >&5
 if eval "test \"`echo '$''{'ac_cv_func_strtod'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3221 "configure"
+#line 3277 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char strtod(); below.  */
@@ -3240,7 +3296,7 @@ strtod();
 
 ; return 0; }
 EOF
-if { (eval echo configure:3244: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3300: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_strtod=yes"
 else
@@ -3262,12 +3318,12 @@ fi
 
     if test "$tcl_strtod" = 1; then
 	echo $ac_n "checking for Solaris2.4/Tru64 strtod bugs""... $ac_c" 1>&6
-echo "configure:3266: checking for Solaris2.4/Tru64 strtod bugs" >&5
+echo "configure:3322: checking for Solaris2.4/Tru64 strtod bugs" >&5
 	if test "$cross_compiling" = yes; then
   tcl_ok=0
 else
   cat > conftest.$ac_ext <<EOF
-#line 3271 "configure"
+#line 3327 "configure"
 #include "confdefs.h"
 
 	    extern double strtod();
@@ -3287,7 +3343,7 @@ else
 		exit(0);
 	    }
 EOF
-if { (eval echo configure:3291: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:3347: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   tcl_ok=1
 else
@@ -3318,12 +3374,12 @@ EOF
 #--------------------------------------------------------------------
 
 echo $ac_n "checking for ANSI C header files""... $ac_c" 1>&6
-echo "configure:3322: checking for ANSI C header files" >&5
+echo "configure:3378: checking for ANSI C header files" >&5
 if eval "test \"`echo '$''{'ac_cv_header_stdc'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3327 "configure"
+#line 3383 "configure"
 #include "confdefs.h"
 #include <stdlib.h>
 #include <stdarg.h>
@@ -3331,7 +3387,7 @@ else
 #include <float.h>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:3335: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:3391: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -3348,7 +3404,7 @@ rm -f conftest*
 if test $ac_cv_header_stdc = yes; then
   # SunOS 4.x string.h does not declare mem*, contrary to ANSI.
 cat > conftest.$ac_ext <<EOF
-#line 3352 "configure"
+#line 3408 "configure"
 #include "confdefs.h"
 #include <string.h>
 EOF
@@ -3366,7 +3422,7 @@ fi
 if test $ac_cv_header_stdc = yes; then
   # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
 cat > conftest.$ac_ext <<EOF
-#line 3370 "configure"
+#line 3426 "configure"
 #include "confdefs.h"
 #include <stdlib.h>
 EOF
@@ -3387,7 +3443,7 @@ if test "$cross_compiling" = yes; then
   :
 else
   cat > conftest.$ac_ext <<EOF
-#line 3391 "configure"
+#line 3447 "configure"
 #include "confdefs.h"
 #include <ctype.h>
 #define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
@@ -3398,7 +3454,7 @@ if (XOR (islower (i), ISLOWER (i)) || toupper (i) != TOUPPER (i)) exit(2);
 exit (0); }
 
 EOF
-if { (eval echo configure:3402: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:3458: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   :
 else
@@ -3422,12 +3478,12 @@ EOF
 fi
 
 echo $ac_n "checking for mode_t""... $ac_c" 1>&6
-echo "configure:3426: checking for mode_t" >&5
+echo "configure:3482: checking for mode_t" >&5
 if eval "test \"`echo '$''{'ac_cv_type_mode_t'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3431 "configure"
+#line 3487 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #if STDC_HEADERS
@@ -3455,12 +3511,12 @@ EOF
 fi
 
 echo $ac_n "checking for pid_t""... $ac_c" 1>&6
-echo "configure:3459: checking for pid_t" >&5
+echo "configure:3515: checking for pid_t" >&5
 if eval "test \"`echo '$''{'ac_cv_type_pid_t'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3464 "configure"
+#line 3520 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #if STDC_HEADERS
@@ -3488,12 +3544,12 @@ EOF
 fi
 
 echo $ac_n "checking for size_t""... $ac_c" 1>&6
-echo "configure:3492: checking for size_t" >&5
+echo "configure:3548: checking for size_t" >&5
 if eval "test \"`echo '$''{'ac_cv_type_size_t'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3497 "configure"
+#line 3553 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #if STDC_HEADERS
@@ -3521,12 +3577,12 @@ EOF
 fi
 
 echo $ac_n "checking for uid_t in sys/types.h""... $ac_c" 1>&6
-echo "configure:3525: checking for uid_t in sys/types.h" >&5
+echo "configure:3581: checking for uid_t in sys/types.h" >&5
 if eval "test \"`echo '$''{'ac_cv_type_uid_t'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3530 "configure"
+#line 3586 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 EOF
@@ -3563,12 +3619,12 @@ fi
 #--------------------------------------------------------------------
 
 echo $ac_n "checking for opendir""... $ac_c" 1>&6
-echo "configure:3567: checking for opendir" >&5
+echo "configure:3623: checking for opendir" >&5
 if eval "test \"`echo '$''{'ac_cv_func_opendir'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3572 "configure"
+#line 3628 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char opendir(); below.  */
@@ -3591,7 +3647,7 @@ opendir();
 
 ; return 0; }
 EOF
-if { (eval echo configure:3595: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3651: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_opendir=yes"
 else
@@ -3624,9 +3680,9 @@ fi
 #--------------------------------------------------------------------
 
 echo $ac_n "checking union wait""... $ac_c" 1>&6
-echo "configure:3628: checking union wait" >&5
+echo "configure:3684: checking union wait" >&5
 cat > conftest.$ac_ext <<EOF
-#line 3630 "configure"
+#line 3686 "configure"
 #include "confdefs.h"
 #include <sys/types.h> 
 #include <sys/wait.h>
@@ -3638,7 +3694,7 @@ WIFEXITED(x);		/* Generates compiler error if WIFEXITED
 
 ; return 0; }
 EOF
-if { (eval echo configure:3642: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3698: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   tcl_ok=yes
 else
@@ -3662,9 +3718,9 @@ fi
 #--------------------------------------------------------------------
 
 echo $ac_n "checking matherr support""... $ac_c" 1>&6
-echo "configure:3666: checking matherr support" >&5
+echo "configure:3722: checking matherr support" >&5
 cat > conftest.$ac_ext <<EOF
-#line 3668 "configure"
+#line 3724 "configure"
 #include "confdefs.h"
 #include <math.h>
 int main() {
@@ -3675,7 +3731,7 @@ x.type = SING;
 
 ; return 0; }
 EOF
-if { (eval echo configure:3679: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:3735: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   tcl_ok=yes
 else
@@ -3700,12 +3756,12 @@ fi
 #--------------------------------------------------------------------
 
 echo $ac_n "checking for strncasecmp""... $ac_c" 1>&6
-echo "configure:3704: checking for strncasecmp" >&5
+echo "configure:3760: checking for strncasecmp" >&5
 if eval "test \"`echo '$''{'ac_cv_func_strncasecmp'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3709 "configure"
+#line 3765 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char strncasecmp(); below.  */
@@ -3728,7 +3784,7 @@ strncasecmp();
 
 ; return 0; }
 EOF
-if { (eval echo configure:3732: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3788: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_strncasecmp=yes"
 else
@@ -3750,7 +3806,7 @@ fi
 
 if test "$tcl_ok" = 0; then
     echo $ac_n "checking for strncasecmp in -lsocket""... $ac_c" 1>&6
-echo "configure:3754: checking for strncasecmp in -lsocket" >&5
+echo "configure:3810: checking for strncasecmp in -lsocket" >&5
 ac_lib_var=`echo socket'_'strncasecmp | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -3758,7 +3814,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lsocket  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 3762 "configure"
+#line 3818 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -3769,7 +3825,7 @@ int main() {
 strncasecmp()
 ; return 0; }
 EOF
-if { (eval echo configure:3773: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3829: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -3793,7 +3849,7 @@ fi
 fi
 if test "$tcl_ok" = 0; then
     echo $ac_n "checking for strncasecmp in -linet""... $ac_c" 1>&6
-echo "configure:3797: checking for strncasecmp in -linet" >&5
+echo "configure:3853: checking for strncasecmp in -linet" >&5
 ac_lib_var=`echo inet'_'strncasecmp | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -3801,7 +3857,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-linet  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 3805 "configure"
+#line 3861 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -3812,7 +3868,7 @@ int main() {
 strncasecmp()
 ; return 0; }
 EOF
-if { (eval echo configure:3816: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3872: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -3850,12 +3906,12 @@ fi
 #--------------------------------------------------------------------
 
 echo $ac_n "checking for BSDgettimeofday""... $ac_c" 1>&6
-echo "configure:3854: checking for BSDgettimeofday" >&5
+echo "configure:3910: checking for BSDgettimeofday" >&5
 if eval "test \"`echo '$''{'ac_cv_func_BSDgettimeofday'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3859 "configure"
+#line 3915 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char BSDgettimeofday(); below.  */
@@ -3878,7 +3934,7 @@ BSDgettimeofday();
 
 ; return 0; }
 EOF
-if { (eval echo configure:3882: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3938: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_BSDgettimeofday=yes"
 else
@@ -3900,12 +3956,12 @@ else
   echo "$ac_t""no" 1>&6
 
     echo $ac_n "checking for gettimeofday""... $ac_c" 1>&6
-echo "configure:3904: checking for gettimeofday" >&5
+echo "configure:3960: checking for gettimeofday" >&5
 if eval "test \"`echo '$''{'ac_cv_func_gettimeofday'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3909 "configure"
+#line 3965 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char gettimeofday(); below.  */
@@ -3928,7 +3984,7 @@ gettimeofday();
 
 ; return 0; }
 EOF
-if { (eval echo configure:3932: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3988: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_gettimeofday=yes"
 else
@@ -3955,9 +4011,9 @@ fi
 fi
 
 echo $ac_n "checking for gettimeofday declaration""... $ac_c" 1>&6
-echo "configure:3959: checking for gettimeofday declaration" >&5
+echo "configure:4015: checking for gettimeofday declaration" >&5
 cat > conftest.$ac_ext <<EOF
-#line 3961 "configure"
+#line 4017 "configure"
 #include "confdefs.h"
 #include <sys/time.h>
 EOF
@@ -3985,14 +4041,14 @@ rm -f conftest*
 #--------------------------------------------------------------------
 
 echo $ac_n "checking whether char is unsigned""... $ac_c" 1>&6
-echo "configure:3989: checking whether char is unsigned" >&5
+echo "configure:4045: checking whether char is unsigned" >&5
 if eval "test \"`echo '$''{'ac_cv_c_char_unsigned'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   if test "$GCC" = yes; then
   # GCC predefines this symbol on systems where it applies.
 cat > conftest.$ac_ext <<EOF
-#line 3996 "configure"
+#line 4052 "configure"
 #include "confdefs.h"
 #ifdef __CHAR_UNSIGNED__
   yes
@@ -4014,7 +4070,7 @@ if test "$cross_compiling" = yes; then
     { echo "configure: error: can not run test program while cross compiling" 1>&2; exit 1; }
 else
   cat > conftest.$ac_ext <<EOF
-#line 4018 "configure"
+#line 4074 "configure"
 #include "confdefs.h"
 /* volatile prevents gcc2 from optimizing the test away on sparcs.  */
 #if !defined(__STDC__) || __STDC__ != 1
@@ -4024,7 +4080,7 @@ main() {
   volatile char c = 255; exit(c < 0);
 }
 EOF
-if { (eval echo configure:4028: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:4084: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   ac_cv_c_char_unsigned=yes
 else
@@ -4048,9 +4104,9 @@ EOF
 fi
 
 echo $ac_n "checking signed char declarations""... $ac_c" 1>&6
-echo "configure:4052: checking signed char declarations" >&5
+echo "configure:4108: checking signed char declarations" >&5
 cat > conftest.$ac_ext <<EOF
-#line 4054 "configure"
+#line 4110 "configure"
 #include "confdefs.h"
 
 int main() {
@@ -4060,7 +4116,7 @@ p = 0;
 
 ; return 0; }
 EOF
-if { (eval echo configure:4064: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:4120: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   tcl_ok=yes
 else
@@ -4091,12 +4147,12 @@ fi
     #--------------------------------------------------------------------
 
     echo $ac_n "checking for sin""... $ac_c" 1>&6
-echo "configure:4095: checking for sin" >&5
+echo "configure:4151: checking for sin" >&5
 if eval "test \"`echo '$''{'ac_cv_func_sin'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 4100 "configure"
+#line 4156 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char sin(); below.  */
@@ -4119,7 +4175,7 @@ sin();
 
 ; return 0; }
 EOF
-if { (eval echo configure:4123: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4179: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_sin=yes"
 else
@@ -4140,7 +4196,7 @@ MATH_LIBS="-lm"
 fi
 
     echo $ac_n "checking for main in -lieee""... $ac_c" 1>&6
-echo "configure:4144: checking for main in -lieee" >&5
+echo "configure:4200: checking for main in -lieee" >&5
 ac_lib_var=`echo ieee'_'main | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -4148,14 +4204,14 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lieee  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 4152 "configure"
+#line 4208 "configure"
 #include "confdefs.h"
 
 int main() {
 main()
 ; return 0; }
 EOF
-if { (eval echo configure:4159: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4215: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -4182,7 +4238,7 @@ fi
     #--------------------------------------------------------------------
 
     echo $ac_n "checking for main in -linet""... $ac_c" 1>&6
-echo "configure:4186: checking for main in -linet" >&5
+echo "configure:4242: checking for main in -linet" >&5
 ac_lib_var=`echo inet'_'main | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -4190,14 +4246,14 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-linet  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 4194 "configure"
+#line 4250 "configure"
 #include "confdefs.h"
 
 int main() {
 main()
 ; return 0; }
 EOF
-if { (eval echo configure:4201: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4257: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -4219,17 +4275,17 @@ fi
 
     ac_safe=`echo "net/errno.h" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for net/errno.h""... $ac_c" 1>&6
-echo "configure:4223: checking for net/errno.h" >&5
+echo "configure:4279: checking for net/errno.h" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 4228 "configure"
+#line 4284 "configure"
 #include "confdefs.h"
 #include <net/errno.h>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:4233: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:4289: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -4274,12 +4330,12 @@ fi
 
     tcl_checkBoth=0
     echo $ac_n "checking for connect""... $ac_c" 1>&6
-echo "configure:4278: checking for connect" >&5
+echo "configure:4334: checking for connect" >&5
 if eval "test \"`echo '$''{'ac_cv_func_connect'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 4283 "configure"
+#line 4339 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char connect(); below.  */
@@ -4302,7 +4358,7 @@ connect();
 
 ; return 0; }
 EOF
-if { (eval echo configure:4306: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4362: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_connect=yes"
 else
@@ -4324,12 +4380,12 @@ fi
 
     if test "$tcl_checkSocket" = 1; then
 	echo $ac_n "checking for setsockopt""... $ac_c" 1>&6
-echo "configure:4328: checking for setsockopt" >&5
+echo "configure:4384: checking for setsockopt" >&5
 if eval "test \"`echo '$''{'ac_cv_func_setsockopt'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 4333 "configure"
+#line 4389 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char setsockopt(); below.  */
@@ -4352,7 +4408,7 @@ setsockopt();
 
 ; return 0; }
 EOF
-if { (eval echo configure:4356: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4412: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_setsockopt=yes"
 else
@@ -4370,7 +4426,7 @@ if eval "test \"`echo '$ac_cv_func_'setsockopt`\" = yes"; then
 else
   echo "$ac_t""no" 1>&6
 echo $ac_n "checking for setsockopt in -lsocket""... $ac_c" 1>&6
-echo "configure:4374: checking for setsockopt in -lsocket" >&5
+echo "configure:4430: checking for setsockopt in -lsocket" >&5
 ac_lib_var=`echo socket'_'setsockopt | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -4378,7 +4434,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lsocket  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 4382 "configure"
+#line 4438 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -4389,7 +4445,7 @@ int main() {
 setsockopt()
 ; return 0; }
 EOF
-if { (eval echo configure:4393: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4449: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -4417,12 +4473,12 @@ fi
 	tk_oldLibs=$LIBS
 	LIBS="$LIBS -lsocket -lnsl"
 	echo $ac_n "checking for accept""... $ac_c" 1>&6
-echo "configure:4421: checking for accept" >&5
+echo "configure:4477: checking for accept" >&5
 if eval "test \"`echo '$''{'ac_cv_func_accept'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 4426 "configure"
+#line 4482 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char accept(); below.  */
@@ -4445,7 +4501,7 @@ accept();
 
 ; return 0; }
 EOF
-if { (eval echo configure:4449: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4505: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_accept=yes"
 else
@@ -4467,12 +4523,12 @@ fi
 
     fi
     echo $ac_n "checking for gethostbyname""... $ac_c" 1>&6
-echo "configure:4471: checking for gethostbyname" >&5
+echo "configure:4527: checking for gethostbyname" >&5
 if eval "test \"`echo '$''{'ac_cv_func_gethostbyname'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 4476 "configure"
+#line 4532 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char gethostbyname(); below.  */
@@ -4495,7 +4551,7 @@ gethostbyname();
 
 ; return 0; }
 EOF
-if { (eval echo configure:4499: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4555: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_gethostbyname=yes"
 else
@@ -4513,7 +4569,7 @@ if eval "test \"`echo '$ac_cv_func_'gethostbyname`\" = yes"; then
 else
   echo "$ac_t""no" 1>&6
 echo $ac_n "checking for gethostbyname in -lnsl""... $ac_c" 1>&6
-echo "configure:4517: checking for gethostbyname in -lnsl" >&5
+echo "configure:4573: checking for gethostbyname in -lnsl" >&5
 ac_lib_var=`echo nsl'_'gethostbyname | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -4521,7 +4577,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lnsl  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 4525 "configure"
+#line 4581 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -4532,7 +4588,7 @@ int main() {
 gethostbyname()
 ; return 0; }
 EOF
-if { (eval echo configure:4536: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4592: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -4578,7 +4634,7 @@ LIBS="$LIBS$THREADS_LIBS"
     # Step 0.a: Enable 64 bit support?
 
     echo $ac_n "checking if 64bit support is requested""... $ac_c" 1>&6
-echo "configure:4582: checking if 64bit support is requested" >&5
+echo "configure:4638: checking if 64bit support is requested" >&5
     # Check whether --enable-64bit or --disable-64bit was given.
 if test "${enable_64bit+set}" = set; then
   enableval="$enable_64bit"
@@ -4598,7 +4654,7 @@ fi
     # Step 0.b: Enable Solaris 64 bit VIS support?
 
     echo $ac_n "checking if 64bit Sparc VIS support is requested""... $ac_c" 1>&6
-echo "configure:4602: checking if 64bit Sparc VIS support is requested" >&5
+echo "configure:4658: checking if 64bit Sparc VIS support is requested" >&5
     # Check whether --enable-64bit-vis or --disable-64bit-vis was given.
 if test "${enable_64bit_vis+set}" = set; then
   enableval="$enable_64bit_vis"
@@ -4622,7 +4678,7 @@ fi
     # there are a few systems, like Next, where this doesn't work.
 
     echo $ac_n "checking system version (for dynamic loading)""... $ac_c" 1>&6
-echo "configure:4626: checking system version (for dynamic loading)" >&5
+echo "configure:4682: checking system version (for dynamic loading)" >&5
     if test -f /usr/lib/NextStep/software_version; then
 	system=NEXTSTEP-`awk '/3/,/3/' /usr/lib/NextStep/software_version`
     else
@@ -4645,7 +4701,7 @@ echo "configure:4626: checking system version (for dynamic loading)" >&5
     fi
 
     echo $ac_n "checking if gcc is being used""... $ac_c" 1>&6
-echo "configure:4649: checking if gcc is being used" >&5
+echo "configure:4705: checking if gcc is being used" >&5
     if test "$CC" = "gcc" -o `$CC -v 2>&1 | grep -c gcc` != "0" ; then
 	using_gcc="yes"
     else
@@ -4658,7 +4714,7 @@ echo "configure:4649: checking if gcc is being used" >&5
     # Linux can use either -ldl or -ldld for dynamic loading.
 
     echo $ac_n "checking for dlopen in -ldl""... $ac_c" 1>&6
-echo "configure:4662: checking for dlopen in -ldl" >&5
+echo "configure:4718: checking for dlopen in -ldl" >&5
 ac_lib_var=`echo dl'_'dlopen | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -4666,7 +4722,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-ldl  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 4670 "configure"
+#line 4726 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -4677,7 +4733,7 @@ int main() {
 dlopen()
 ; return 0; }
 EOF
-if { (eval echo configure:4681: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4737: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -4796,7 +4852,7 @@ fi
 	    # known GMT value.
 
 	    echo $ac_n "checking for gettimeofday in -lbsd""... $ac_c" 1>&6
-echo "configure:4800: checking for gettimeofday in -lbsd" >&5
+echo "configure:4856: checking for gettimeofday in -lbsd" >&5
 ac_lib_var=`echo bsd'_'gettimeofday | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -4804,7 +4860,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lbsd  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 4808 "configure"
+#line 4864 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -4815,7 +4871,7 @@ int main() {
 gettimeofday()
 ; return 0; }
 EOF
-if { (eval echo configure:4819: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4875: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -4877,7 +4933,7 @@ EOF
 	HP-UX-*.08.*|HP-UX-*.09.*|HP-UX-*.10.*|HP-UX-*.11.*)
 	    SHLIB_SUFFIX=".sl"
 	    echo $ac_n "checking for shl_load in -ldld""... $ac_c" 1>&6
-echo "configure:4881: checking for shl_load in -ldld" >&5
+echo "configure:4937: checking for shl_load in -ldld" >&5
 ac_lib_var=`echo dld'_'shl_load | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -4885,7 +4941,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-ldld  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 4889 "configure"
+#line 4945 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -4896,7 +4952,7 @@ int main() {
 shl_load()
 ; return 0; }
 EOF
-if { (eval echo configure:4900: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4956: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -5003,17 +5059,17 @@ fi
 	    else
 		ac_safe=`echo "dld.h" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for dld.h""... $ac_c" 1>&6
-echo "configure:5007: checking for dld.h" >&5
+echo "configure:5063: checking for dld.h" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 5012 "configure"
+#line 5068 "configure"
 #include "confdefs.h"
 #include <dld.h>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:5017: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:5073: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -5068,17 +5124,17 @@ fi
 	    # Not available on all versions:  check for include file.
 	    ac_safe=`echo "dlfcn.h" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for dlfcn.h""... $ac_c" 1>&6
-echo "configure:5072: checking for dlfcn.h" >&5
+echo "configure:5128: checking for dlfcn.h" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 5077 "configure"
+#line 5133 "configure"
 #include "confdefs.h"
 #include <dlfcn.h>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:5082: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:5138: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -5105,9 +5161,9 @@ if eval "test \"`echo '$ac_cv_header_'$ac_safe`\" = yes"; then
 		LDFLAGS=""
 		LD_SEARCH_FLAGS='-Wl,-rpath,${LIB_RUNTIME_DIR}'
 		echo $ac_n "checking for ELF""... $ac_c" 1>&6
-echo "configure:5109: checking for ELF" >&5
+echo "configure:5165: checking for ELF" >&5
 		cat > conftest.$ac_ext <<EOF
-#line 5111 "configure"
+#line 5167 "configure"
 #include "confdefs.h"
 
 #ifdef __ELF__
@@ -5285,6 +5341,15 @@ EOF
 	    TCL_LIB_VERSIONS_OK=nodots
 	    ;;
 	SunOS-5.[0-6]*)
+
+	    # Note: If _REENTRANT isn't defined, then Solaris
+	    # won't define thread-safe library routines.
+
+	    cat >> confdefs.h <<\EOF
+#define _REENTRANT 1
+EOF
+
+
 	    SHLIB_CFLAGS="-KPIC"
 	    SHLIB_LD="/usr/ccs/bin/ld -G -z text"
 
@@ -5299,6 +5364,15 @@ EOF
 	    LD_SEARCH_FLAGS='-Wl,-R,${LIB_RUNTIME_DIR}'
 	    ;;
 	SunOS-5*)
+
+	    # Note: If _REENTRANT isn't defined, then Solaris
+	    # won't define thread-safe library routines.
+
+	    cat >> confdefs.h <<\EOF
+#define _REENTRANT 1
+EOF
+
+
 	    SHLIB_CFLAGS="-KPIC"
 	    SHLIB_LD="/usr/ccs/bin/ld -G -z text"
 	    LDFLAGS=""
@@ -5360,17 +5434,17 @@ EOF
 	    # that don't grok the -Bexport option.  Test that it does.
 	    hold_ldflags=$LDFLAGS
 	    echo $ac_n "checking for ld accepts -Bexport flag""... $ac_c" 1>&6
-echo "configure:5364: checking for ld accepts -Bexport flag" >&5
+echo "configure:5438: checking for ld accepts -Bexport flag" >&5
 	    LDFLAGS="${LDFLAGS} -Wl,-Bexport"
 	    cat > conftest.$ac_ext <<EOF
-#line 5367 "configure"
+#line 5441 "configure"
 #include "confdefs.h"
 
 int main() {
 int i;
 ; return 0; }
 EOF
-if { (eval echo configure:5374: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:5448: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   found=yes
 else
@@ -5416,9 +5490,9 @@ rm -f conftest*
 
     if test "x$DL_OBJS" = "xtclLoadAout.o" ; then
 	echo $ac_n "checking sys/exec.h""... $ac_c" 1>&6
-echo "configure:5420: checking sys/exec.h" >&5
+echo "configure:5494: checking sys/exec.h" >&5
 	cat > conftest.$ac_ext <<EOF
-#line 5422 "configure"
+#line 5496 "configure"
 #include "confdefs.h"
 #include <sys/exec.h>
 int main() {
@@ -5436,7 +5510,7 @@ int main() {
     
 ; return 0; }
 EOF
-if { (eval echo configure:5440: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:5514: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   tcl_ok=usable
 else
@@ -5454,9 +5528,9 @@ EOF
 
 	else
 	    echo $ac_n "checking a.out.h""... $ac_c" 1>&6
-echo "configure:5458: checking a.out.h" >&5
+echo "configure:5532: checking a.out.h" >&5
 	    cat > conftest.$ac_ext <<EOF
-#line 5460 "configure"
+#line 5534 "configure"
 #include "confdefs.h"
 #include <a.out.h>
 int main() {
@@ -5474,7 +5548,7 @@ int main() {
 	    
 ; return 0; }
 EOF
-if { (eval echo configure:5478: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:5552: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   tcl_ok=usable
 else
@@ -5492,9 +5566,9 @@ EOF
 
 	    else
 		echo $ac_n "checking sys/exec_aout.h""... $ac_c" 1>&6
-echo "configure:5496: checking sys/exec_aout.h" >&5
+echo "configure:5570: checking sys/exec_aout.h" >&5
 		cat > conftest.$ac_ext <<EOF
-#line 5498 "configure"
+#line 5572 "configure"
 #include "confdefs.h"
 #include <sys/exec_aout.h>
 int main() {
@@ -5512,7 +5586,7 @@ int main() {
 		
 ; return 0; }
 EOF
-if { (eval echo configure:5516: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:5590: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   tcl_ok=usable
 else
@@ -5607,7 +5681,7 @@ fi
 
 
     echo $ac_n "checking for build with symbols""... $ac_c" 1>&6
-echo "configure:5611: checking for build with symbols" >&5
+echo "configure:5685: checking for build with symbols" >&5
     # Check whether --enable-symbols or --disable-symbols was given.
 if test "${enable_symbols+set}" = set; then
   enableval="$enable_symbols"
@@ -5644,17 +5718,17 @@ CFLAGS=${CFLAGS_DEFAULT}
 do
 ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6
-echo "configure:5648: checking for $ac_hdr" >&5
+echo "configure:5722: checking for $ac_hdr" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 5653 "configure"
+#line 5727 "configure"
 #include "confdefs.h"
 #include <$ac_hdr>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:5658: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:5732: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -5684,17 +5758,17 @@ done
 do
 ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6
-echo "configure:5688: checking for $ac_hdr" >&5
+echo "configure:5762: checking for $ac_hdr" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 5693 "configure"
+#line 5767 "configure"
 #include "confdefs.h"
 #include <$ac_hdr>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:5698: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:5772: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -5721,7 +5795,7 @@ fi
 done
 
     echo $ac_n "checking FIONBIO vs. O_NONBLOCK for nonblocking I/O""... $ac_c" 1>&6
-echo "configure:5725: checking FIONBIO vs. O_NONBLOCK for nonblocking I/O" >&5
+echo "configure:5799: checking FIONBIO vs. O_NONBLOCK for nonblocking I/O" >&5
     if test -f /usr/lib/NextStep/software_version; then
 	system=NEXTSTEP-`awk '/3/,/3/' /usr/lib/NextStep/software_version`
     else
@@ -5783,7 +5857,7 @@ TCL_SHARED_LIB_SUFFIX=${SHARED_LIB_SUFFIX}
 
 
     echo $ac_n "checking how to build libraries""... $ac_c" 1>&6
-echo "configure:5787: checking how to build libraries" >&5
+echo "configure:5861: checking how to build libraries" >&5
     # Check whether --enable-shared or --disable-shared was given.
 if test "${enable_shared+set}" = set; then
   enableval="$enable_shared"
diff --git a/unix/tcl.m4 b/unix/tcl.m4
index 0bef313..1d9af67 100644
--- a/unix/tcl.m4
+++ b/unix/tcl.m4
@@ -986,6 +986,12 @@ AC_DEFUN(SC_CONFIG_CFLAGS, [
 	    TCL_LIB_VERSIONS_OK=nodots
 	    ;;
 	SunOS-5.[[0-6]]*)
+
+	    # Note: If _REENTRANT isn't defined, then Solaris
+	    # won't define thread-safe library routines.
+
+	    AC_DEFINE(_REENTRANT)
+
 	    SHLIB_CFLAGS="-KPIC"
 	    SHLIB_LD="/usr/ccs/bin/ld -G -z text"
 
@@ -1000,6 +1006,12 @@ AC_DEFUN(SC_CONFIG_CFLAGS, [
 	    LD_SEARCH_FLAGS='-Wl,-R,${LIB_RUNTIME_DIR}'
 	    ;;
 	SunOS-5*)
+
+	    # Note: If _REENTRANT isn't defined, then Solaris
+	    # won't define thread-safe library routines.
+
+	    AC_DEFINE(_REENTRANT)
+
 	    SHLIB_CFLAGS="-KPIC"
 	    SHLIB_LD="/usr/ccs/bin/ld -G -z text"
 	    LDFLAGS=""
@@ -1623,6 +1635,8 @@ AC_DEFUN(SC_TIME_HANDLER, [
     AC_HEADER_TIME
     AC_STRUCT_TIMEZONE
 
+    AC_CHECK_FUNCS(gmtime_r localtime_r)
+
     AC_MSG_CHECKING([tm_tzadj in struct tm])
     AC_TRY_COMPILE([#include <time.h>], [struct tm tm; tm.tm_tzadj;],
 	    [AC_DEFINE(HAVE_TM_TZADJ)
diff --git a/unix/tclUnixTime.c b/unix/tclUnixTime.c
index 9990aad..b0c5e9f 100644
--- a/unix/tclUnixTime.c
+++ b/unix/tclUnixTime.c
@@ -9,13 +9,37 @@
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tclUnixTime.c,v 1.7 2000/01/14 22:15:52 ericm Exp $
+ * RCS: @(#) $Id: tclUnixTime.c,v 1.8 2001/04/09 23:02:21 kennykb Exp $
  */
 
 #include "tclInt.h"
 #include "tclPort.h"
 #define TM_YEAR_BASE 1900
 #define IsLeapYear(x)   ((x % 4 == 0) && (x % 100 != 0 || x % 400 == 0))
+
+/*
+ * TclpGetDate is coded to return a pointer to a 'struct tm'.  For
+ * thread safety, this structure must be in thread-specific data.
+ * The 'tmKey' variable is the key to this buffer.
+ */
+
+Tcl_ThreadDataKey tmKey;
+
+/*
+ * If we fall back on the thread-unsafe versions of gmtime and localtime,
+ * use this mutex to try to protect them.
+ */
+
+#if !defined(HAVE_GMTIME_R) || !defined(HAVE_LOCALTIME_R)
+TCL_DECLARE_MUTEX( tmMutex )
+#endif
+
+/*
+ * Forward declarations for procedures defined later in this file.
+ */
+
+static struct tm *ThreadSafeGMTime _ANSI_ARGS_(( CONST time_t* ));
+static struct tm *ThreadSafeLocalTime _ANSI_ARGS_(( CONST time_t* ));
 
 /*
  *-----------------------------------------------------------------------------
@@ -115,7 +139,7 @@ TclpGetTimeZone (currentTime)
 #if defined(HAVE_TM_TZADJ)
 #   define TCL_GOT_TIMEZONE
     time_t      curTime = (time_t) currentTime;
-    struct tm  *timeDataPtr = localtime(&curTime);
+    struct tm  *timeDataPtr = ThreadSafeLocalTime(&curTime);
     int         timeZone;
 
     timeZone = timeDataPtr->tm_tzadj  / 60;
@@ -129,7 +153,7 @@ TclpGetTimeZone (currentTime)
 #if defined(HAVE_TM_GMTOFF) && !defined (TCL_GOT_TIMEZONE)
 #   define TCL_GOT_TIMEZONE
     time_t     curTime = (time_t) currentTime;
-    struct tm *timeDataPtr = localtime(&curTime);
+    struct tm *timeDataPtr = ThreadSafeLocalTime(&curTime);
     int        timeZone;
 
     timeZone = -(timeDataPtr->tm_gmtoff / 60);
@@ -152,7 +176,7 @@ TclpGetTimeZone (currentTime)
     time_t tt;
     struct tm *stm;
     tt = 849268800L;      /*    1996-11-29 12:00:00  GMT */
-    stm = localtime(&tt); /* eg 1996-11-29  6:00:00  CST6CDT */
+    stm = ThreadSafeLocalTime(&tt); /* eg 1996-11-29  6:00:00  CST6CDT */
     /* The calculation below assumes a max of +12 or -12 hours from GMT */
     timeZone = (12 - stm->tm_hour)*60 + (0 - stm->tm_min);
     return timeZone;  /* eg +360 for CST6CDT */
@@ -268,9 +292,9 @@ TclpGetDate(time, useGMT)
     CONST time_t *tp = (CONST time_t *)time;
 
     if (useGMT) {
-	return gmtime(tp);
+	return ThreadSafeGMTime(tp);
     } else {
-	return localtime(tp);
+	return ThreadSafeLocalTime(tp);
     }
 }
 
@@ -308,3 +332,85 @@ TclpStrftime(s, maxsize, format, t)
     }
     return strftime(s, maxsize, format, t);
 }
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ThreadSafeGMTime --
+ *
+ *	Wrapper around the 'gmtime' library function to make it thread
+ *	safe.
+ *
+ * Results:
+ *	Returns a pointer to a 'struct tm' in thread-specific data.
+ *
+ * Side effects:
+ *	Invokes gmtime or gmtime_r as appropriate.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static struct tm *
+ThreadSafeGMTime( timePtr )
+    CONST time_t *timePtr;	/* Pointer to the number of seconds
+				 * since the local system's epoch
+				 */
+
+{
+
+    /*
+     * Get a thread-local buffer to hold the returned time.
+     */
+
+    struct tm * tmPtr = (struct tm*) Tcl_GetThreadData( &tmKey,
+							sizeof( struct tm ) );
+#ifdef HAVE_GMTIME_R
+    gmtime_r( timePtr, tmPtr );
+#else
+    Tcl_MutexLock( & tmMutex );
+    *tmPtr = gmtime( timePtr );
+    Tcl_MutexUnlock( &tmMutex );
+#endif    
+    return tmPtr;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ThreadSafeLocalTime --
+ *
+ *	Wrapper around the 'localtime' library function to make it thread
+ *	safe.
+ *
+ * Results:
+ *	Returns a pointer to a 'struct tm' in thread-specific data.
+ *
+ * Side effects:
+ *	Invokes localtime or localtime_r as appropriate.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static struct tm *
+ThreadSafeLocalTime( timePtr )
+    CONST time_t *timePtr;	/* Pointer to the number of seconds
+				 * since the local system's epoch
+				 */
+
+{
+
+    /*
+     * Get a thread-local buffer to hold the returned time.
+     */
+
+    struct tm * tmPtr = (struct tm*) Tcl_GetThreadData( &tmKey,
+							sizeof( struct tm ) );
+#ifdef HAVE_LOCALTIME_R
+    localtime_r( timePtr, tmPtr );
+#else
+    Tcl_MutexLock( & tmMutex );
+    *tmPtr = localtime( timePtr );
+    Tcl_MutexUnlock( &tmMutex );
+#endif    
+    return tmPtr;
+}