JNI无法在NetBeans上检测到__int64 [英] JNI cannot detect __int64 on NetBeans
问题描述
我正在尝试编译本机库以便在java(使用JNI)中使用它。我已经按照本教程:
https://cnd.netbeans .org / docs / jni / beginning-jni-win.html
I'm trying to compile a native library to use it from java (with JNI). I have followed this tutorial: https://cnd.netbeans.org/docs/jni/beginning-jni-win.html
当我尝试编译时,我有这个错误(见第4行):
When I try to compile, I have this error (see line 4):
[...]
In file included from ../../Progra~2/Java/jdk1.8.0_91/include/jni.h:45:0,
from HelloWorldNative.h:3,
from HelloWorldNative.c:6:
../../Progra~2/Java/jdk1.8.0_91/include/win32/jni_md.h:34:9: error: unknown type name '__int64'
typedef __int64 jlong;
^
nbproject/Makefile-Debug.mk:66: recipe for target 'build/Debug/Cygwin-Windows/HelloWorldNative.o' failed
[...]
我可以解决此错误,在此之前添加 typedef long long __int64
#include< jni.h>
但我认为有些事情我做错了。
I can solve this error adding a typedef long long __int64
before the #include <jni.h>
but I assume that there is something that I'm doing wrong.
以下是代码:
HEADER FILE:
HEADER FILE:
/* DO NOT EDIT THIS FILE - it is machine generated */
typedef long long __int64; // <============ Why do I need to do this?
#include <jni.h>
/* Header for class helloworld_Main */
#ifndef _Included_helloworld_Main
#define _Included_helloworld_Main
#ifdef __cplusplus
extern "C" {
#endif
/*
* Class: helloworld_Main
* Method: nativePrint
* Signature: ()V
*/
JNIEXPORT void JNICALL Java_helloworld_Main_nativePrint
(JNIEnv *, jobject);
#ifdef __cplusplus
}
#endif
#endif
SOURCE FILE:
SOURCE FILE:
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
#include "HelloWorldNative.h"
JNIEXPORT void JNICALL Java_helloworld_Main_nativePrint
(JNIEnv *env, jobject _this){
}
推荐答案
__ int64
是Visual Studio 特定类型
__int64
is Visual Studio specific type
使用 int64_t或uint64_t 等标准类型。对于C ++,在< cstdint>
中定义,对于C,在< stdint.h>
中定义。
Use standard types like int64_t or uint64_t. Defined in <cstdint>
for C++ and in <stdint.h>
for C.
您可以在JNI常见问题中找到错误的精确解决方案:
Exact solution to your error can be found in JNI faq:
http://www.oracle.com/technetwork/java/jni-j2sdk -faq-141732.html
Your compiler might not like __int64 in jni_md.h. You should fix this by adding:
#ifdef FOOBAR_COMPILER
#define __int64 signed_64_bit_type
#endif
where signed_64_bit_type is the name of the signed 64 bit type supported by your compiler.
所以你应该使用:
#define __int64 long long
或:
#include <stdint.h>
#define __int64 int64_t
这与你最初的做法非常相似
which is quite similar to what you have initially done
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