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Re: Where is sqrtf?
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Re: Where is sqrtf?


  • Subject: Re: Where is sqrtf?
  • From: Mike Lazear <email@hidden>
  • Date: Sat, 8 Jan 2005 19:35:31 -0800


On Jan 8, 2005, at 7:18 PM, Robert Purves wrote:

At the command line, gcc has no problem with this tiny program:

/* test.c */
#include <math.h>
#include <stdio.h>
int main( void )
{
float x = sqrtf( 2.0f );
printf( "%f\n", x );
return 0;
}

% gcc -lmx -o test test.c
%

Note: -lmx is required for C99 float functions such as sqrtf, in math.h


When I try the same in Xcode (with -lmx specified in Other C Flags), I get an error:
gcc-3.3: -lmx: linker input file unused because linking not done
ld: Undefined symbols: _sqrtf

How can I persuade Xcode that sqrtf exists?

In XCode I selected a new project of type "Carbon Application". I replaced the standard main() with yours and it compiled, linked and ran fine.

Here's my current main.c file:

//
// main.c
// junk
//
// Created by Mike Lazear on 1/8/05.
// Copyright __MyCompanyName__ 2005. All rights reserved.
//

#include <Carbon/Carbon.h>

int main(int argc, char* argv[])
{
float x = sqrtf( 2.0f );
printf( "%f\n", x );
return 0;
}

Hope that helps,
Mike
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References: 
 >Where is sqrtf? (From: Robert Purves <email@hidden>)

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