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Mail Archives: djgpp/2009/08/26/14:28:28

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From: "stephen att" <stephenmck AT att DOT net>
To: <djgpp AT delorie DOT com>
Subject: PROBLEMS COMPILING DPMI APPLICATION - LIBRARY ROUTINES NOT FOUND
Date: Wed, 26 Aug 2009 11:26:54 -0700
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I have a very large application which uses DPMI and I can't get it to =
compile with DJGPP - I always get "undefined reference" fatal errors. =
"__dpmi_int" is always identified as such a reference although I am =
including the correct header file and the compile include directive - =
the command line I use is:

gcc testdpmi.c -o a.exe -I c:\djgpp\include

I believe the dmpi library calls are in liba so this shouldn't be =
happening; can you help?

FULL TEXT OF COMPILE MESSAGES
gcc testdpmi.c -o a.exe -I c:\djgpp\include
C:\DOCUME~1\sml\LOCALS~1\Temp/ccSAcaaa.o:testdpmi.c:(.text+0x6d): =
undefined refe
rence to `__dpmi_int'
C:\DOCUME~1\sml\LOCALS~1\Temp/ccSAcaaa.o:testdpmi.c:(.text+0x8b): =
undefined refe
rence to `translate_keypad'
collect2: ld returned 1 exit status

I include the test source file also

stephen mckinnon
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 6.00.2900.3603" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT size=3D2>
<DIV><FONT size=3D2>I have a very large application which uses DPMI and =
I can't=20
get it to compile with DJGPP - I always get "undefined reference" fatal =
errors.=20
"__dpmi_int" is always identified as such a reference although I am =
including=20
the correct header file and the compile include directive - the command =
line I=20
use is:</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>gcc testdpmi.c -o a.exe -I =
c:\djgpp\include</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>I believe the dmpi library calls are in liba so this =
shouldn't=20
be happening; can you help?</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>FULL TEXT OF COMPILE MESSAGES</FONT></DIV>
<DIV><FONT size=3D2>gcc testdpmi.c -o a.exe -I=20
c:\djgpp\include<BR>C:\DOCUME~1\sml\LOCALS~1\Temp/ccSAcaaa.o:testdpmi.c:(=
.text+0x6d):=20
undefined refe<BR>rence to=20
`__dpmi_int'<BR>C:\DOCUME~1\sml\LOCALS~1\Temp/ccSAcaaa.o:testdpmi.c:(.tex=
t+0x8b):=20
undefined refe<BR>rence to `translate_keypad'<BR>collect2: ld returned 1 =
exit=20
status</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>I include the test source file also</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>stephen =
mckinnon</FONT></DIV></FONT></DIV></BODY></HTML>

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#include <stdio.h>
#include <dpmi.h>
#include <go32.h>

main(argc,argv)
int argc;
char *argv[];
{

    char input;
    
    printf("begining loop - type # to exit program\nfirst>");
    
    for( input = rgetchar(); input != '#'; printf("next>") ) ;
    
    return;
}

/* ================== PUBLIC FUNCTIONS ================== */

/*  Returns a keystroke, translated into a Rogue command.
 */
rgetchar()
{
    char ch;
    register scancode;
    __dpmi_regs regs;

    for(;;) {
        regs.h.ah = 0x00; /* get keystroke */
        __dpmi_int(0x16, &regs);
        scancode = regs.h.ah; /* BIOS scancode */
        
        if(scancode>0x46 && scancode<0x54)
            ch = translate_keypad(scancode);
        else
            ch = regs.h.al; /* ASCII code */

        switch(ch) {
        case '\022': /* ^R */
            printf("refresh the screen\n");
            break;
        case '&':
            printf("save the screen\n");
            break;
        default:
            return(ch);
        }
    }
}


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