Skip libpthread check in Darwin builds

Bug #212708 r=wtc

nsprpub/configure

@@ -5136,9 +5136,14 @@ esac
 
 
 
-
+case "$target_os" in
+darwin*)
+    _HAVE_PTHREADS=1
+    ;;
+*)
+    
 echo $ac_n "checking for pthread_create in -lpthreads""... $ac_c" 1>&6
-echo "configure:5142: checking for pthread_create in -lpthreads" >&5
+echo "configure:5147: checking for pthread_create in -lpthreads" >&5
 echo "
     #include <pthread.h> 
     void *foo(void *v) { return v; } 
@@ -5160,7 +5165,7 @@ echo "
         echo "$ac_t""no" 1>&6
         
 echo $ac_n "checking for pthread_create in -lpthread""... $ac_c" 1>&6
-echo "configure:5164: checking for pthread_create in -lpthread" >&5
+echo "configure:5169: checking for pthread_create in -lpthread" >&5
 echo "
     #include <pthread.h> 
     void *foo(void *v) { return v; } 
@@ -5182,7 +5187,7 @@ echo "
         echo "$ac_t""no" 1>&6
         
 echo $ac_n "checking for pthread_create in -lc_r""... $ac_c" 1>&6
-echo "configure:5186: checking for pthread_create in -lc_r" >&5
+echo "configure:5191: checking for pthread_create in -lc_r" >&5
 echo "
     #include <pthread.h> 
     void *foo(void *v) { return v; } 
@@ -5204,7 +5209,7 @@ echo "
         echo "$ac_t""no" 1>&6
         
 echo $ac_n "checking for pthread_create in -lc""... $ac_c" 1>&6
-echo "configure:5208: checking for pthread_create in -lc" >&5
+echo "configure:5213: checking for pthread_create in -lc" >&5
 echo "
     #include <pthread.h> 
     void *foo(void *v) { return v; } 
@@ -5222,22 +5227,24 @@ echo "
     if test "$_res" = "0"; then
         echo "$ac_t""yes" 1>&6
         _HAVE_PTHREADS=1
-            
+                
     else
         echo "$ac_t""no" 1>&6
         
     fi
 
+            
+    fi
+
         
     fi
 
     
     fi
 
+    ;;
+esac
 
-    fi
-
-                        
 # Check whether --with-pthreads or --without-pthreads was given.
 if test "${with_pthreads+set}" = set; then
   withval="$with_pthreads"
@@ -5356,7 +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:5360: 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
@@ -5379,7 +5386,7 @@ echo "configure:5360: 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:5383: 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

nsprpub/configure.in

@@ -2188,19 +2188,26 @@ echo "
     fi
 ])
 
-MOZ_CHECK_PTHREADS(pthreads,
-    _HAVE_PTHREADS=1 _PTHREAD_LDFLAGS="-lpthreads",
-    MOZ_CHECK_PTHREADS(pthread,
-        _HAVE_PTHREADS=1 _PTHREAD_LDFLAGS="-lpthread",
-        MOZ_CHECK_PTHREADS(c_r,
-            _HAVE_PTHREADS=1 _PTHREAD_LDFLAGS="-lc_r",
-            MOZ_CHECK_PTHREADS(c,
-                _HAVE_PTHREADS=1
+case "$target_os" in
+darwin*)
+    _HAVE_PTHREADS=1
+    ;;
+*)
+    MOZ_CHECK_PTHREADS(pthreads,
+        _HAVE_PTHREADS=1 _PTHREAD_LDFLAGS="-lpthreads",
+        MOZ_CHECK_PTHREADS(pthread,
+            _HAVE_PTHREADS=1 _PTHREAD_LDFLAGS="-lpthread",
+            MOZ_CHECK_PTHREADS(c_r,
+                _HAVE_PTHREADS=1 _PTHREAD_LDFLAGS="-lc_r",
+                MOZ_CHECK_PTHREADS(c,
+                    _HAVE_PTHREADS=1
+                )
             )
         )
     )
-)
-                        
+    ;;
+esac
+
 AC_ARG_WITH(pthreads,
     [  --with-pthreads         Use system pthreads library as thread subsystem],
     [ if test "$withval" = "yes"; then