Re: GCC 3.3 and signal 5 (SIGTRAP).
Re: GCC 3.3 and signal 5 (SIGTRAP).
- Subject: Re: GCC 3.3 and signal 5 (SIGTRAP).
- From: Prachi Gauriar <email@hidden>
- Date: Sat, 5 Jun 2004 10:33:26 -0500
On Jun 5, 2004, at 10:08 AM, Bill Lowrey wrote:
Today I am trying to follow the C Language tutorial posted at
http://www.cocoadevcentral.com/ and I get a similar error when trying
to call members defined in a simple header file as follows in a file
named "math_functions.h":
int sum (int value1, int value2);
float average (float value1, float value2, float value3);
Now trying to use them in a C file like this:
#include <stdio.h>
#include "math_functions.h"
int main ()
{
int theSum = sum (8, 12);
float theAverage = average (16.9, 7.86, 3.4);
printf ("the sum is: %i ", theSum);
printf ("and the average is: %f \n", theAverage);
printf ("average casted to an int is: %i \n", (int)theAverage);
return 0;
}
I get an error:
ld: Undefined symbols:
_average
_sum
I am compiling from the command line.
Make sure you have ZeroLink turned off. If it's turned on, the app
will only
run from the debugger, I believe.
You said you're doing this via the command-line? I assume you're using
gcc and not xcodebuild. Then ZeroLink isn't an issue (unless you're
doing some very strange things in this tutorial).
Supposing that main() is in a file called main.c, average() and sum()
are in a file called math_functions.c, and those two functions are
defined in math_functions.h, you should type the following to compile:
gcc math_functions.c main.c -o MathFunctions
-Prachi
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