Build libhadoop.dylib on Mac OS X Lion

build.sh

patch -p0 <<EOF
diff -ru a/src/native/src/org/apache/hadoop/security/JniBasedUnixGroupsNetgroupMapping.c b/src/native/src/org/apache/hadoop/security/JniBasedUnixGroupsNetgroupMapping.c
--- src/native/src/org/apache/hadoop/security/JniBasedUnixGroupsNetgroupMapping.c  2011-07-19 04:12:32.000000000 +0900
+++ src/native/src/org/apache/hadoop/security/JniBasedUnixGroupsNetgroupMapping.c   2011-10-31 15:27:23.000000000 +0900
@@ -73,7 +73,8 @@
   // was successfull or not (as long as it was called we need to call
   // endnetgrent)
   setnetgrentCalledFlag = 1;
-  if(setnetgrent(cgroup) == 1) {
+  setnetgrent(cgroup);
+  {
     UserList *current = NULL;
     // three pointers are for host, user, domain, we only care
     // about user now

EOF

# build fails if /usr/local/lib directory does not exist
[ -d /usr/local/lib ] || sudo mkdir /usr/local/lib

C_INCLUDE_PATH="/System/Library/Frameworks/JavaVM.framework/Headers:$C_INCLUDE_PATH" ant compile-native

echo build/native/Mac_OS_X-x86_64-64/lib
ls build/native/Mac_OS_X-x86_64-64/lib

echo 'run hadoop as:"
echo '_JAVA_OPTIONS="-Djava.library.path=`pwd`/build/native/Mac_OS_X-x86_64-64/lib" hadoop ...'