我可以从JNI调用的C程序中调用C函数吗？

I have already done a research about JNI,and I think I understand how it works, but I've been trying to call to a C function from another C func called by JNI.

我已经对JNI做了一个研究,我想我理解它是如何工作的,但我一直试图从JNI调用的另一个C函数调用一个C函数。

I have 2 .c, HelloWorld and HelloWorld2, and a java program to call HelloWorld. HelloWorld at the same time calls to a function defined in HelloWold2 but this causes an error when executing.

我有2个.c,HelloWorld和HelloWorld2,以及一个调用HelloWorld的java程序。 HelloWorld同时调用HelloWold2中定义的函数,但这会在执行时导致错误。

java: symbol lookup error: /home/hduser/Desktop/final2/libhello.so: undefined symbol: helloworld

java:符号查找错误:/home/hduser/Desktop/final2/libhello.so:undefined symbol:helloworld

1 个解决方案

#1

Assuming that you have two files:

假设你有两个文件:

HelloWorld.c HelloWorld2.c

and HelloWorld is supposed to call something from HelloWorld2 you can:

和HelloWorld应该从HelloWorld2中调用一些东西,你可以:

put both into the same shared lib

将两者放入同一个共享库中

put both into separate shared lib and make sure HelloWorld is linked with HelloWorld2

将两者放入单独的共享库中,并确保HelloWorld与HelloWorld2链接

Make sure that shared libraries are visible by setting LD_LIBRARY_PATH.

通过设置LD_LIBRARY_PATH确保共享库可见。

You can find some JNI samples here: http://jnicookbook.owsiak.org/

你可以在这里找到一些JNI样本:http://jnicookbook.owsiak.org/

#1