Error when compiling the native c method: error in jni.h

Question

Hello friends,
I am using windows 2000, JDK1.4 and Borland Turbo C++ Comipler.
I am learing JNI. And therefore I followd instruction on creating a simp,e JNI call from "Sun Java Tutorial"
But I am getting problem during compiling of the C program.
there are about 26 errors in jni.h and jni_md.h
Here are the errors:
    Error JNI_MD.H 16: , expected
    Error JNI_MD.H 108: Declaration missing ;
    Error ../JNI.H 193: ) expected
    Error ../JNI.H 195: ) expected
    Error ../JNI.H 198: ) expected
    Error ../JNI.H 201: ) expected............ and so on.
Can anyone help me.

Answer 1

The basic problem is that Borland C and VC++ define some things differently, and the header files are geared to VC++.
The way I got around this is to make some adjustments to my C code to impose the Borland definitions in place of the VC++ definitions. I do this creating a .h file that
o Includes my definitions.
o Includes jni.h
I then #include my .h file instead of directly including jni.h. That way, I don't need to change jni.h or jni.md.h
Here is roughly what it looks like. (Can't give you the exact code - the files are proprietary and include a lot not-relevant stuff.)
If you run into troubles with some files compiling, and some not, then I suggest you move some of the macro redefinitions to a .cpp file, and just # include that into your own .cpp file.
(file shell.h)
#ifndef ShellH
#define ShellH
// This file is used to make Borland-specific settings.
// Normal kinds of stuff.
#define WIN32
#define HAS_BOOL
// Suppress dll code.
#ifdef jdecl
#undef jdecl
#endif
#define jdecl
// Borland has seen fit to specially-define toString();
#ifdef toString
#undef toString
#endif
#define toString jToString
// Define functions and constants per Borland (vs Microsoft).
#define _chdir chdir
#define _cwd cwd
//#define _getcwd getcwd
#define _getpid getpid
//#define _stat stat
#define SHDENYWR SH_DENYWR
#include "jni.h"
#endif