JNI无法在NetBeans上检测到__int64

Question

我正在尝试编译一个本机库，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

错误

当我尝试编译时，我有这个错误（见第4行）：

[...]
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
[...]

我可以在typedef long long __int64之前添加#include <jni.h>来解决此错误，但我认为有些事我做错了。

代码

以下是代码：

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：

/*
 * 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){

}

Answer 1

<cstdint>是Visual Studio specific type

使用int64_t or uint64_t等标准类型。在<stdint.h>中为C ++定义，在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. 中为C。

定义

您可以在JNI常见问题中找到错误的精确解决方案：

http://www.oracle.com/technetwork/java/jni-j2sdk-faq-141732.html

#define __int64 long long

所以你应该使用：

#include <stdint.h>
#define __int64 int64_t

或：

{{1}}

这与你最初的做法非常相似

Answer 2

首先在构建工具中检查c编译器。更改该错误可以为我解决错误。