Hi All,
I have a very simple program at this point

#include <string.h>

int main()
{

return 1;
}

I compile using
gcc -Wall -ansi -c -o foo.c.o foo.c

and try to link using

/usr/bin/ld -o ld.o foo.c.o -lc

and I get

/usr/bin/ld: warning: cannot find entry symbol _start; defaulting to 08048100

Could someone please help me with what's going on, so that I could move on to writing some real code. I have about a few hundred object files to link and using "ld" is my only option at this time.

Thanks,

Try compiling with just: gcc -Wall -ansi foo.c -o foo

The symbol you are missing is part of a default library, crt0.o.
Using the gcc command itsme86 gave you automatically links that symbol into your program for you.

Thanks. This seems to help. Could you please let me kow what's the difference here?

Also -- one problem I have is, if I have references to other functions, say, I am compiling and linking multiple modules, how could I avoid the linker errors while compiling?

Thanks,

Dear People using JWASM,
I got the same error as above unable to find _start when I called the linker and it was caused by putting an underscore on the definition of the start label i.e. using _start: instead of using start:
The above is the sample code for helloworld.asm
try it out with the jwasm compiler for linux and ld which is in /usr/bin/ld

I found the error by looking at the object table with the command

objdump -hrt helloworld.o and that showed that start was being given an underscore at some point by the assembler when producing the object file helloworld.o

centruion-21, you'll have much better luck creating a new post than tacking onto a post from '04. In addition, you've created a duplicate post on another thread which is not allowed. I've split your other thread into a new thread.

http://www.linuxquestions.org/questi...0-10-a-841667/