java - 使用Java原生接口(interface)时出现 "fatal: relocations remain against allocatable but non-writable sections"如何解决？

Question

我正在尝试在 Java 代码中调用 C 函数。我有这个 hava 代码。

public class JavaToC {

    public native void helloC();

    static {
        System.loadLibrary("HelloWorld");
    }

    public static void main(String[] args) {
        new JavaToC().helloC();
    }
}

.我编译了它，然后创建了头文件。然后制作以下 HelloWorld.c 文件。

#include <stdio.h>
#include <jni.h>
#include "JavaToC.h"
JNIEXPORT void JNICALL Java_JavaToC_helloC(JNIEnv *env, jobject javaobj)
{
  printf("Hello World: From C");
  return;
}

我尝试使用“gcc -o libHelloWorld.so -shared -I/usr/java/include -I/usr/java/include/solaris HelloWorld.c -lc”编译它，但它给出了以下结果。

Text relocation remains                     referenced
    against symbol          offset  in file
.rodata (section)                   0x9         /var/tmp//cc.GaGrd.o
printf                              0xe         /var/tmp//cc.GaGrd.o
ld: fatal: relocations remain against allocatable but non-writable sections
collect2: ld returned 1 exit status

我正在使用 Solaris 11，我该如何解决这个问题？

Answer 1

目前我无法在 Solaris 机器上测试这个，但是来自 http://gcc.gnu.org/onlinedocs/gcc-4.1.0/gcc/SPARC-Options.html

-mimpure-text suppresses the “relocations remain against allocatable but non-writable sections” linker error message. However, the necessary relocations will trigger copy-on-write, and the shared object is not actually shared across processes. Instead of using -mimpure-text, you should compile all source code with -fpic or -fPIC.

解决方案似乎是添加-fpic 选项来生成与位置无关的代码。