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[Bug c/57944] New: undefined reference to 'sqrt'
- From: "spingoogl at shaw dot ca" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sat, 20 Jul 2013 23:23:24 +0000
- Subject: [Bug c/57944] New: undefined reference to 'sqrt'
- Auto-submitted: auto-generated
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57944
Bug ID: 57944
Summary: undefined reference to 'sqrt'
Product: gcc
Version: 4.7.3
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: spingoogl at shaw dot ca
The following is copy/pasted from my console.
This seems to be simple K&R stuff
The only difference is that in sqrt() I used a variable instead of a number.
The number compiled properly
The variable failed to compile
I tried similar code in cygwin on windows xp using gcc 3.4.4 and it compiled
ok.
Thanks for you time.
gerald@gerald-desktop:~/GTK$ cat pthgrs_good.c
#include <stdio.h>
#include <math.h>
main(){
double A=3, B=4, C;
C=sqrt( (double) 25 );
printf ("The hypotenuse of a triangle with sides of 3 and 4 is %.2f.\n",
C);
return 0;
}
gerald@gerald-desktop:~/GTK$ gcc pthgrs_good.c -o pthgrs_good.x
gerald@gerald-desktop:~/GTK$ ./pthgrs_good.x
The hypotenuse of a triangle with sides of 3 and 4 is 5.00.
gerald@gerald-desktop:~/GTK$ cat pthgrs_bad.c
#include <stdio.h>
#include <math.h>
main(){
double A=3, B=4, C, D=25;
C=sqrt( (double) D );
printf ("The hypotenuse of a triangle with sides of 3 and 4 is %.2f.\n",
C);
return 0;
}
gerald@gerald-desktop:~/GTK$ gcc pthgrs_bad.c -o pthgrs_bad.x
/tmp/cc98lPPJ.o: In function `main':
pthgrs_bad.c:(.text+0x40): undefined reference to `sqrt'
collect2: error: ld returned 1 exit status
gerald@gerald-desktop:~/GTK$ gcc --version
gcc (Ubuntu/Linaro 4.7.3-1ubuntu1) 4.7.3
Copyright (C) 2012 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.