On Linux, use $(CC) to link the shared library. Define _REENTRANT in just

one place for Solaris.  Use the null command : instead of 'true'.
Modified files: configure.in, configure.

nsprpub/configure

@@ -3494,9 +3494,9 @@ EOF
     CXXFLAGS="$CXXFLAGS -ansi -Wall -pipe"
     MDCPUCFG_H=_linux.cfg
     PR_MD_CSRCS=linux.c
-    MKSHLIB='$(LD) $(DSO_LDOPTS) -soname $(notdir $@) -o $@'
+    MKSHLIB='$(CC) $(DSO_LDOPTS) -o $@'
     DSO_CFLAGS=-fPIC
-    DSO_LDOPTS=-shared
+    DSO_LDOPTS='-shared -Wl,-soname -Wl,$(notdir $@)'
     OS_LIBS="$OS_LIBS -lc"
     _OPTIMIZE_FLAGS=-O2
     case "${target_cpu}" in
@@ -4987,10 +4987,6 @@ echo "configure:4975: checking whether ${CC-cc} accepts -pthreads" >&5
 
     case "$target" in
     *-solaris*)
-	    cat >> confdefs.h <<\EOF
-#define _REENTRANT 1
-EOF
-
         if test "$ac_cv_have_dash_pthreads" = "yes"; then
             _PTHREAD_LDFLAGS=
         fi
@@ -5154,7 +5150,7 @@ EOF
     fi
     if test -n "$USE_PTHREADS"; then
         if echo $OS_RELEASE | egrep -c '(V2.0|V3.2)' 2>/dev/null; then
-            true
+            :
         else
             cat >> confdefs.h <<\EOF
 #define _PR_HAVE_THREADSAFE_GETHOST 1

nsprpub/configure.in

@@ -1027,9 +1027,9 @@ case "$target" in
     CXXFLAGS="$CXXFLAGS -ansi -Wall -pipe"
     MDCPUCFG_H=_linux.cfg
     PR_MD_CSRCS=linux.c
-    MKSHLIB='$(LD) $(DSO_LDOPTS) -soname $(notdir $@) -o $@'
+    MKSHLIB='$(CC) $(DSO_LDOPTS) -o $@'
     DSO_CFLAGS=-fPIC
-    DSO_LDOPTS=-shared
+    DSO_LDOPTS='-shared -Wl,-soname -Wl,$(notdir $@)'
     OS_LIBS="$OS_LIBS -lc"
     _OPTIMIZE_FLAGS=-O2
     case "${target_cpu}" in
@@ -1933,7 +1933,6 @@ if test -n "$USE_PTHREADS"; then
 
     case "$target" in
     *-solaris*)
-	    AC_DEFINE(_REENTRANT)
         if test "$ac_cv_have_dash_pthreads" = "yes"; then
             _PTHREAD_LDFLAGS=
         fi
@@ -2043,7 +2042,7 @@ case "$target" in
     fi
     if test -n "$USE_PTHREADS"; then
         if echo $OS_RELEASE | egrep -c '(V2.0|V3.2)' 2>/dev/null; then
-            true
+            :
         else
             AC_DEFINE(_PR_HAVE_THREADSAFE_GETHOST)
         fi