Message-ID: <388B06EA.D02633F@connection.com>
Date: Sun, 23 Jan 2000 08:49:31 -0500
From: sam <samirw AT connection DOT com>
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Newsgroups: comp.os.msdos.djgpp
Subject: creating libraries how?
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

Ok, boys anyone that knows what I am doing? I don't.


I have the following source file TLFUNC.CC
-------------------------------------------------
#include "stdio.h"
#include "gppconio.h"
#include "fcntl.h"
#include "unistd.h"
#include "sys\stat.h"
#include "io.h"
#include "stdlib.h"
#include "string.h"
#include "pc.h"                         /*djgpp ScreenGetCursor() */

#include "libtl.h"
#include "key_def.h"

extern unsigned char ScreenAttrib;


void color_text( int row, int col, int forg, int bakg, char *string )
{
int     orig_attr;
    orig_attr = ScreenAttrib;
    ScreenAttrib = (bakg<<4) + forg;
    if ( !( (row == -1 ) || ( col == -1 ) ) )
        gotoxy( col, row );
    cputs( string );
    textattr( orig_attr );
}
-------------------------------------

I have compiled it  with:
d:\djgpp\applib\>gcc -c tlfunc.cc

Now I create library with:
d:\djgpp\applib\>ar -rs libtl.a tlfunc.cc

verify that the index is there by doing list:           (with -t not -s
or -nm

as the first  page of info ar suggests.)
d:\djgpp\applib\>ar -t libtl.a
(get tlfunc.o)
So, I try to build the following file: (maintest.cc)
------------------------------------------------------------------
#define COMPILE_GLOBALS

#include "dos.h"
#include "gppconio.h"
#include "libtl.h"

extern unsigned char ScreenAttrib;

int main( int argc, char *argv[] )
{
struct text_info tx_info;
    _setcursortype( _NOCURSOR );
    window(1, 1, 34, 25 );
    gettextinfo( &tx_info );
    color_text( 3, 20, 10, 2, "This it it." );
    gettextinfo( &tx_info );
    delay(1000);
    color_text( 4, 21, 12, 2, "This it it.\r\nand here too." );
    delay(1000);
    _setcursortype( _NORMALCURSOR );
}
----------------------------------------------

With:

 8:36:04.79
D:\DJGPP\mytests>gpp maintest.cc -I..\applib -L..\applib\tl -o
maintest.exe
d:/djgpp/tmp\ccM794sS.o(.text+0x6b):maintest.cc: undefined reference to
`color_t
ext(int, int, int, int, char *)'
d:/djgpp/tmp\ccM794sS.o(.text+0xa2):maintest.cc: undefined reference to
`color_t
ext(int, int, int, int, char *)'
collect2: ld returned 1 exit status

 8:36:32.25
D:\DJGPP\mytests>

GCC is the same think.

BTW: which is the one that will pick language according to the extension
GCC | GPP.


Any suggestions greatly appreciated.