Impossible to compile two files

joaopa · Post by **joaopa** » Sat Feb 20, 2016 5:05 am

I have two files!

try1.c
#include <stdio.h>

int affiche(void);

int main(void)
{
printf("toto\n");
affiche();
return 0;
}

try2.c
#include <stdio.h>

int affiche(void)
{
printf("tata\n");
return 0;
}

With gcc, this is correct:
gcc -o try try1. try2.c

With z88dk, I obtain
zcc +zx -o try try1.c try2.c
cp /home/david/z88dk/lib/config//../..//lib/spec_crt0.opt /tmp/tmpXXw3UHJE.opt
cp /tmp/tmpXXw3UHJE.opt /tmp/tmpXXw3UHJE.asm
zcpp -I. -DZ80 -DSPECTRUM -D__SPECTRUM__ -D__SPECTRUM -DSCCZ80 -DSMALL_C -I/home/david/z88dk/lib/config//../..//include try1.c /tmp/tmpXXO32KhH.i
sccz80 -asm=z80asm /tmp/tmpXXO32KhH.i
copt /home/david/z88dk/lib/config//../..//lib/z80rules.2 < /tmp/tmpXXO32KhH.asm > /tmp/tmpXXO32KhH.op1
copt /home/david/z88dk/lib/config//../..//lib/z80rules.1 < /tmp/tmpXXO32KhH.op1 > /tmp/tmpXXO32KhH.opt
z80asm -eopt -ns -Mo -I/home/david/z88dk/lib/config//../..//lib /tmp/tmpXXO32KhH.opt
Error at file '/tmp/tmpXXO32KhH.opt' line 23: symbol '_affiche' not defined
1 errors occurred during assembly
Errors in source file try1.c:
Error at file '/tmp/tmpXXO32KhH.opt' line 23: symbol '_affiche' not defined
^ ---- call _affiche

Post by **alvin** » Sat Feb 20, 2016 6:04 am

sccz80 is creating function prototypes with static linkage by default rather than extern.

Slipping an extern keyword in front of function prototypes will work around the bug:

try1.c

Code: Select all

#include <stdio.h>

extern int affiche(void);

int main(void)
{
    printf("toto\n");
    affiche();
    return 0;
}

joaopa · Post by **joaopa** » Sat Feb 20, 2016 9:19 am

Thanks. That did the trick. It would be a good idea to fix this bug though!!

Post by **alvin** » Sat Feb 20, 2016 4:14 pm

Linkage for function prototypes has to be changed to EXTERN by default in declglb() but I'm not familiar enough with the code to figure out how to do it.

Post by **alvin** » Sun Feb 21, 2016 6:19 am

Fixed in the feb 22 build.

An updated windows sccz80.exe file can be downloaded from here before feb 22:
https://drive.google.com/open?id=0B6XhJ ... i01QjRtdE0