protobuf shared library can not work correctly on Android 2.1(NDK),2.2 (NDK) , but it can work well on Android 2.3(NDK).

What steps will reproduce the problem?
1.I compiled protobuf(version 2.4.1) to libprotubuf.so with 
NDKr5+cygwin+windows XP.
2.In java code, load this libprotobuf.so like this:   
System.loadLibrary("protobuffull");
3.run my test code to use protobuf.

What is the expected output? What do you see instead?
When I run my test code in android 2.3, it worked very well, load 
libprotobuf.so and then run my test code correctly.
But when I run the code in android 2.1, I found that I can't load 
libprotobuf.so. The logcat showed that it stopped when I try to load 
libprotubuf.so .

What version of the product are you using? On what operating system?
the version of protobuf is 2.4.1, the cell phone os is android 2.1 ,2.2 and 2.3.

Please provide any additional information below.
1. Android.mk:

...
...
..
                google/protobuf/io/zero_copy_stream_impl.cc \
                   google/protobuf/io/zero_copy_stream_impl_lite.cc 

LOCAL_CPP_EXTENSION := .cc

LOCAL_C_INCLUDES := $(LOCAL_PATH)/google/protobuf/io \
                    $(LOCAL_PATH)/google/protobuf/stubs \
                    $(LOCAL_PATH)/google/protobuf \
                    $(LOCAL_PATH)/google/protobuf/compiler \
                    $(LOCAL_PATH)
LOCAL_LDLIBS := -lz                

include $(BUILD_SHARED_LIBRARY)

2. load the shared lib in java code :

System.loadLibrary("protobuffull"); //(it doesn't work in android 2.1 2.2 cell 
phone, but it works well in android 2.3 cell phone)

Original issue reported on code.google.com by nki...@gmail.com on 23 Aug 2011 at 6:39

zf8848 / protobuf

protobuf shared library can not work correctly on Android 2.1(NDK),2.2 (NDK) , but it can work well on Android 2.3(NDK). #325