cc, as and ld

atalmapi · 01-31-2007, 03:10 AM

Hello,
I have to compile a program using cc, as and ld.
Here is the program :

Code:

#include <stdio.h>
long int factorielle(int n) {
 if (n<2)
 return 1;
 else
 return n*factorielle(n-1);
}

int main(int argc, char *argv[]){
 int i;
 printf("Hello World!\n\n");
 for(i=0;i<10;i++)
  printf("%i! = %li\n",i,factorielle(i));
 return 0;
}

I use the folowing commands :

Code:

cc -c -S toto.c
as -o toto.o toto.s

No problem at this point, but the use of ld become complicated. I succeded using it like that:

Code:

ld -o toto /usr/lib/crt1.o /usr/lib/crti.o /usr/lib/crtn.o /usr/lib/libc.so toto.o

No errors appears but it's impossible to execute the resulting program toto (of course I made a chmod).

I absolutely need to use cc, as and ld : can someone help me ?

Thanks for all...

wjevans_7d1@yahoo.co · 01-31-2007, 04:43 AM

To help you better, it would be useful to know why you need to use cc, as, and ld, instead of just cc without the -c switch.

bigearsbilly · 01-31-2007, 05:48 AM

well, how does it fail?

first try make toto as per normal usage (no makefile needed)
and see if the resultant prog works.

I did this:

Code:

billym.primadtpdev>make toto
gcc     toto.c   -o toto
billym.primadtpdev>toto
Hello World!

0! = 1
1! = 1
2! = 2
3! = 6
4! = 24
5! = 120
6! = 720
7! = 5040
8! = 40320
9! = 362880

nx5000 · 01-31-2007, 06:46 AM

Something like this:

Code:

ld -dynamic-linker /lib/ld-linux.so.2 -o toto /usr/lib/crt1.o /usr/lib/crti.o /usr/lib/gcc/i486-linux-gnu/4.1.2/crtbegin.o /toto.o -lc /usr/lib/gcc/i486-linux-gnu/4.1.2/crtend.o /usr/lib/crtn.o

It depends on the version of binutils.

Quote:

/tmp$ ./toto
Hello World!

0! = 1
1! = 1
2! = 2
3! = 6
4! = 24
5! = 120
6! = 720
7! = 5040
8! = 40320
9! = 362880