topic Re: Problem compiling a C program in Operating System - HP-UX

Problem compiling a C program

Sreeni — Fri, 11 May 2001 19:56:08 GMT

We have a C program compiled in HP-UX 10. It has been working fine. The exe still works fine on HP11.

Needed to make some minor changes. Now, I cannot compile it. I am getting the following error at every function declaration.
(Bundled) cc: "mg.c", line 241: error 1705: Function prototypes are an ANSI feature.

Does anyone know, how this bundled CC is different from the regular CC.

Please help.

Re: Problem compiling a C program

A. Clay Stephenson — Fri, 11 May 2001 20:04:14 GMT

You bet. The bundled c compiler is K&R and is really only intended for building kernels.
If you are doing any even moderately serious development you are going to have the purchase the ANSI C compiler or the aCC compiler (which also does C++). The other option is gcc available for one of the HP-UX porting centers or from www.gnu.org.

Regards, Clay

Re: Problem compiling a C program

Shannon Petry — Mon, 14 May 2001 10:55:58 GMT

Another thing to try is to use the ANSI emulation in the K&R compiler
I.E.
cc -Aa -o ouput.exe myprog.c

It may work if you compiled previously with the K&R compiler and not ANSI.

For allignment and performance it is well worth the HP ANSI/C bundle though, and will remove this error. My only complaint about ANSI/C is that it does not support new style comments....

Regards,
Shannon

Re: Problem compiling a C program

Juan González — Mon, 14 May 2001 13:11:30 GMT

Hi,
try converting your functions to K&R.
You can follow this example:

ANSI
int myfunction(int a, char b) {

/* your code */
}

K&R

int myfunction(a,b)
int a;
char b;
{

/* your code */

}

Best regards
Juan Gonzalez

Re: Problem compiling a C program

Sreeni — Mon, 14 May 2001 17:15:08 GMT

Juan,

Looks like you are putting me in the right track. Most of my errors went away, when I have changed the way you have suggested, by changing the function definition.

I am still having the compilation errors with the main() function.

My code says :

main(int argc, char *argv[]){
....
}

Could you please tell me what would be the syntax in K&R. I am expecting 3 or 4 parameters to the program.

Thanks for your help.

Re: Problem compiling a C program

A. Clay Stephenson — Mon, 14 May 2001 17:18:58 GMT

Hi Sreeni,

The K&R syntax for main is

int main(argc,argv)
int argc;
char *argv[];
{
....
....
}

But again, this is not a very good development environment for anything serious.

Clay