From:	BNCarper AT cs DOT com
Message-ID:	<a.f91e62b.2881d0fc@cs.com>
Date:	Sat, 14 Jul 2001 12:44:44 EDT
Subject:	Using .lib files
To:	djgpp AT delorie DOT com
CC:	eliz AT is DOT elta DOT co DOT il
MIME-Version:	1.0
X-Mailer:	CompuServe 2000 32-bit sub 107
Reply-To:	djgpp AT delorie DOT com

On Sun, 1 Jul 2001 BNCarper AT cs DOT com wrote:

> I'm trying to build some custom software for my CCD Astronomy camera.  The 
> mfg. provides a header file (.h) and a library file (.lib) for persons 
> wanting to write the software in DOS.  They then provide several .dll for 
Win 
> 32 programming using MSVC or VB. I have already written some of the 
software 
> in MSVC 6.0 but I have always preferred using DJGPP.

>Did you try any of the methods listed in section 17.5 of the FAQ?  They 
>are you only hope.

Thanks for your help.  I have found where the mfg. has let someone build the 
library in LINUX, so I have a library file in .a format.  Can I use that in 
DJGPP?  I have tried but the header file has the following code at the end of 
the header file.  I can't seem to get the program to find the 
ParDrvCommand().  Do I need to change the ENV_DOS to DJGPP somehow?


/*

    Function Prototypes

    This are the driver interface functions.

    ParDrvCommand()  Supports Cameras
    Each function takes a command parameter and pointers
    to parameters and results structs.

    The calling program needs to allocate the memory for
    the parameters and results structs and these routines
    read them and fill them in respectively.

*/
#if TARGET == ENV_DOS
  #ifdef __cplusplus
    extern "C" short ParDrvCommand(short command, void*Params, void*Results);
  #else
    extern short ParDrvCommand(short command, void*Params, void*Results);
  #endif
#elif TARGET == ENV_WIN
  #ifdef __cplusplus
    "C" short __export ParDrvCommand(short command, void far *Params, void 
far *Results);
  #else
    short __export  ParDrvCommand(short command, void far *Params, void far 
*Results);
  #endif
#else
  #ifdef __cplusplus
    extern "C" __declspec(dllexport) short ParDrvCommand(short command, 
void*Params, void*Results);
  #else
    extern __declspec(dllexport) short ParDrvCommand(short command, 
void*Params, void*Results);
  #endif
#endif


Thanks, 
Bob

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