CC:=/usr/local/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/darwin-x86_64/bin/arm-linux-androideabi-gcc -std=c99 -lc --sysroot=/usr/local/android-ndk-r9d/platforms/android-15/arch-arm/

http://www.kandroid.org/ndk/docs/STANDALONE-TOOLCHAIN.html

@sqbing 不过貌似这个gcc缺失很多东西啊
CC:=/usr/local/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/darwin-x86_64/bin/arm-linux-androideabi-gcc -std=c99 -lc
提示缺失 stdio.h 等等啊

@sqbing 嗯好的，我再试试看这个
toolchains/arm-linux-androideabi-4.6/prebuilt/darwin-x86_64/bin/arm-linux-androideabi-gcc

@sqbing 不知道是不是我ndk的问题。。。。。

@sqbing 嗯，编译通过了，在linux上能跑

@sqbing 我用的是arm-none-linux-gnueabi-gcc 交叉编译 静态库

@sqbing
#include <string.h>
#include <jni.h>
#include "librsa.h"
jstring
Java_com_example_hellojni_HelloJni_stringFromJNI( JNIEnv* env,
jobject thiz )
{
#if defined(__arm__)
#if defined(__ARM_ARCH_7A__)
#if defined(__ARM_NEON__)
#define ABI "armeabi-v7a/NEON"
#else
#define ABI "armeabi-v7a"
#endif
#else
#define ABI "armeabi"
#endif
#elif defined(__i386__)
#define ABI "x86"
#elif defined(__mips__)
#define ABI "mips"
#else
#define ABI "unknown"
#endif

rsa_test(0, NULL);
return (*env)->NewStringUTF(env, "tic ttx I " ABI ".");
}

@sqbing
LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)
LOCAL_CFLAGS := -Wall -pedantic -std=c99 -g
LOCAL_LDLIBS := -L jni/ -lrsa -lc
LOCAL_MODULE := hello-jni
LOCAL_SRC_FILES := hello-jni.c
include $(BUILD_SHARED_LIBRARY)