diff --git a/nsprpub/configure b/nsprpub/configure
index dee2a0a31fcd..9dbd85881690 100755
--- a/nsprpub/configure
+++ b/nsprpub/configure
@@ -4593,25 +4593,6 @@ EOF
 
     cat >> confdefs.h <<\EOF
 #define HAVE_FCNTL_FILE_LOCKING 1
-EOF
-
-    # Define Solaris feature test macros.  (See the standards(5) man page.)
-    # We conform to SUS (XPG4v2).
-    cat >> confdefs.h <<\EOF
-#define _XOPEN_SOURCE 1
-EOF
-
-    cat >> confdefs.h <<\EOF
-#define _XOPEN_SOURCE_EXTENDED 1
-EOF
-
-    # But we also use interfaces and headers not defined by the standard.
-    cat >> confdefs.h <<\EOF
-#define __EXTENSIONS__ 1
-EOF
-
-    cat >> confdefs.h <<\EOF
-#define HAVE_SOCKLEN_T 1
 EOF
 
     MDCPUCFG_H=_solaris.cfg
@@ -4927,7 +4908,7 @@ case $target in
     ;;
 *)
     echo $ac_n "checking for dlopen in -ldl""... $ac_c" 1>&6
-echo "configure:4931: checking for dlopen in -ldl" >&5
+echo "configure:4912: checking for dlopen in -ldl" >&5
 ac_lib_var=`echo dl'_'dlopen | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -4935,7 +4916,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-ldl  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 4939 "configure"
+#line 4920 "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
@@ -4946,7 +4927,7 @@ int main() {
 dlopen()
 ; return 0; }
 EOF
-if { (eval echo configure:4950: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4931: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -4963,17 +4944,17 @@ if eval "test \"`echo '$ac_cv_lib_'$ac_lib_var`\" = yes"; then
   echo "$ac_t""yes" 1>&6
   ac_safe=`echo "dlfcn.h" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for dlfcn.h""... $ac_c" 1>&6
-echo "configure:4967: checking for dlfcn.h" >&5
+echo "configure:4948: checking for dlfcn.h" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 4972 "configure"
+#line 4953 "configure"
 #include "confdefs.h"
 #include <dlfcn.h>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:4977: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:4958: \"$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*
@@ -5006,13 +4987,13 @@ esac
 
 if test $ac_cv_prog_gcc = yes; then
     echo $ac_n "checking whether ${CC-cc} needs -traditional""... $ac_c" 1>&6
-echo "configure:5010: checking whether ${CC-cc} needs -traditional" >&5
+echo "configure:4991: checking whether ${CC-cc} needs -traditional" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_gcc_traditional'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
     ac_pattern="Autoconf.*'x'"
   cat > conftest.$ac_ext <<EOF
-#line 5016 "configure"
+#line 4997 "configure"
 #include "confdefs.h"
 #include <sgtty.h>
 Autoconf TIOCGETP
@@ -5030,7 +5011,7 @@ rm -f conftest*
 
   if test $ac_cv_prog_gcc_traditional = no; then
     cat > conftest.$ac_ext <<EOF
-#line 5034 "configure"
+#line 5015 "configure"
 #include "confdefs.h"
 #include <termio.h>
 Autoconf TCGETA
@@ -5054,12 +5035,12 @@ fi
 for ac_func in lchown strerror
 do
 echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
-echo "configure:5058: checking for $ac_func" >&5
+echo "configure:5039: 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 5063 "configure"
+#line 5044 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char $ac_func(); below.  */
@@ -5082,7 +5063,7 @@ $ac_func();
 
 ; return 0; }
 EOF
-if { (eval echo configure:5086: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:5067: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_$ac_func=yes"
 else
@@ -5123,7 +5104,7 @@ hpux*)
 if test -z "$GNU_CC"; then
 
     echo $ac_n "checking for +Olit support""... $ac_c" 1>&6
-echo "configure:5127: checking for +Olit support" >&5
+echo "configure:5108: checking for +Olit support" >&5
 if eval "test \"`echo '$''{'ac_cv_hpux_usable_olit_option'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -5162,7 +5143,7 @@ darwin*)
 *)
     
 echo $ac_n "checking for pthread_create in -lpthreads""... $ac_c" 1>&6
-echo "configure:5166: checking for pthread_create in -lpthreads" >&5
+echo "configure:5147: checking for pthread_create in -lpthreads" >&5
 echo "
     #include <pthread.h> 
     void *foo(void *v) { return v; } 
@@ -5184,7 +5165,7 @@ echo "
         echo "$ac_t""no" 1>&6
         
 echo $ac_n "checking for pthread_create in -lpthread""... $ac_c" 1>&6
-echo "configure:5188: checking for pthread_create in -lpthread" >&5
+echo "configure:5169: checking for pthread_create in -lpthread" >&5
 echo "
     #include <pthread.h> 
     void *foo(void *v) { return v; } 
@@ -5206,7 +5187,7 @@ echo "
         echo "$ac_t""no" 1>&6
         
 echo $ac_n "checking for pthread_create in -lc_r""... $ac_c" 1>&6
-echo "configure:5210: checking for pthread_create in -lc_r" >&5
+echo "configure:5191: checking for pthread_create in -lc_r" >&5
 echo "
     #include <pthread.h> 
     void *foo(void *v) { return v; } 
@@ -5228,7 +5209,7 @@ echo "
         echo "$ac_t""no" 1>&6
         
 echo $ac_n "checking for pthread_create in -lc""... $ac_c" 1>&6
-echo "configure:5232: checking for pthread_create in -lc" >&5
+echo "configure:5213: checking for pthread_create in -lc" >&5
 echo "
     #include <pthread.h> 
     void *foo(void *v) { return v; } 
@@ -5382,7 +5363,7 @@ if test -n "$USE_PTHREADS"; then
       rm -f conftest*
    ac_cv_have_dash_pthread=no
    echo $ac_n "checking whether ${CC-cc} accepts -pthread""... $ac_c" 1>&6
-echo "configure:5386: checking whether ${CC-cc} accepts -pthread" >&5
+echo "configure:5367: checking whether ${CC-cc} accepts -pthread" >&5
    echo 'int main() { return 0; }' | cat > conftest.c
    ${CC-cc} -pthread -o conftest conftest.c > conftest.out 2>&1
    if test $? -eq 0; then
@@ -5405,7 +5386,7 @@ echo "configure:5386: checking whether ${CC-cc} accepts -pthread" >&5
 			    ac_cv_have_dash_pthreads=no
     if test "$ac_cv_have_dash_pthread" = "no"; then
 	    echo $ac_n "checking whether ${CC-cc} accepts -pthreads""... $ac_c" 1>&6
-echo "configure:5409: checking whether ${CC-cc} accepts -pthreads" >&5
+echo "configure:5390: checking whether ${CC-cc} accepts -pthreads" >&5
     	echo 'int main() { return 0; }' | cat > conftest.c
 	    ${CC-cc} -pthreads -o conftest conftest.c > conftest.out 2>&1
     	if test $? -eq 0; then
diff --git a/nsprpub/configure.in b/nsprpub/configure.in
index 9e9a2bcf2709..c91ca2da38b3 100644
--- a/nsprpub/configure.in
+++ b/nsprpub/configure.in
@@ -1797,13 +1797,6 @@ mips-sony-newsos*)
     AC_DEFINE(__svr4__)
     AC_DEFINE(SOLARIS)
     AC_DEFINE(HAVE_FCNTL_FILE_LOCKING)
-    # Define Solaris feature test macros.  (See the standards(5) man page.)
-    # We conform to SUS (XPG4v2).
-    AC_DEFINE(_XOPEN_SOURCE)
-    AC_DEFINE(_XOPEN_SOURCE_EXTENDED)
-    # But we also use interfaces and headers not defined by the standard.
-    AC_DEFINE(__EXTENSIONS__)
-    AC_DEFINE(HAVE_SOCKLEN_T)
     MDCPUCFG_H=_solaris.cfg
     PR_MD_CSRCS=solaris.c
     LD=/usr/ccs/bin/ld