Don't remove /dev/null on 8.x (see kern/139014)
-bdrewery 09/27/2013
--- deps/eleveldb/c_src/leveldb/build_detect_platform.orig	2014-01-10 00:50:17.000000000 +0000
+++ deps/eleveldb/c_src/leveldb/build_detect_platform	2014-07-06 14:20:03.716601064 +0000
@@ -134,7 +134,7 @@
     true
 else
     # If -std=c++0x works, use <cstdatomic>.  Otherwise use port_posix.h.
-    $CXX $CFLAGS -std=c++0x -x c++ - -o /dev/null 2>/dev/null  <<EOF
+    $CXX $CFLAGS -std=c++0x -x c++ - 2>/dev/null  <<EOF
       #include <cstdatomic>
       int main() {}
 EOF
@@ -147,7 +147,7 @@
 
     # Test whether Snappy library is installed
     # http://code.google.com/p/snappy/
-    $CXX $CFLAGS -x c++ - -o /dev/null 2>/dev/null  <<EOF
+    $CXX $CFLAGS -x c++ - 2>/dev/null  <<EOF
       #include <snappy.h>
       int main() {}
 EOF
@@ -157,7 +157,7 @@
     fi
 
     # Test whether tcmalloc is available
-    $CXX $CFLAGS -x c++ - -o /dev/null -ltcmalloc 2>/dev/null  <<EOF
+    $CXX $CFLAGS -x c++ - -ltcmalloc 2>/dev/null  <<EOF
       int main() {}
 EOF
     if [ "$?" = 0 ]; then