Date:	Thu, 26 May 1994 15:52:46 GMT
From:	David Denholm <denholm AT sotona DOT physics DOT southampton DOT ac DOT uk>
To:	djgpp AT sun DOT soe DOT clarkson DOT edu
Subject:	gppconio clrscr() problems...

Hi,
   I posted this to comp.os.msdos.programmer, but someone recommended I
try here instead...

A colleage can't get clrscr() to work as expected... the following draws
only a brown line down column 2 of either the screen or the window, if one
is explicitly defined.

#include <conio.h>

main()
{
   textbackground(BROWN);
   textcolor(YELLOW);
   /* window(5,5,10,10); /* */
   clrscr();
}


tried downloading the source for the library... looks okay to my untrained
eye - except textmode() is defined as a null function ????


part II

when I tried to explicitly compile-in gppconio.c and screen.s with
test.c above, I get unresolved symbols getch and dosmemsetup
gppconio.c(.text+521): undefined reference to `getch'
...
fake(.text+52): undefined reference to `dosmemsetup'
...

- BTW - what is fake - some sort of internal table in linker ?

now from what I can tell, both looking at the source and ar-ing the
libraries, dosmemsetup is in libc, which 'gcc -v' shows that it is
being scanned...hang on...yes, if I add a call to printf, that is
resolved [at least no errors...]

the symbols are resolved if I link test.o with -lpc, yet these
symbols aren't in libpc.a ... are they ..?


What feature of the linker am I missing here..?


[aside - just got a link error/warning 'repeated symbol start'
 I notice that crt0.s defines a fn start...  shouldn't that be
 at least __start or something..???
]


I cant believe it's the library, as someone must have noticed by now..?
It's not anything like different calling conventions between c and c++,
or anything like that..?  [NAH - couldn't be...]

thanks in advance, and apologies if this is not the right place for this...

dd

-- 
David Denholm         'official' : D DOT R DOT Denholm AT southampton DOT ac DOT uk
Physics dept.          preferred : denholm AT sotona DOT physics DOT southampton DOT ac DOT uk
Southampton University       Tel : (0703) 592104 (work)   (0489) 576733 (home)
Southampton SO9 5NH          Fax : (0703) 585813

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