Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.debian.user > #239613

gcc-10: options order important?

Show all headers | View raw

Hi,

in contrary to previous versions, now in Debian 11 with gcc-10:

gcc aa.c -lm -o aa           works, but

gcc -lm aa.c -o aa           does not work, saying: 

/usr/bin/ld: /tmp/ccWyhudO.o: in function `main':
aa.c:(.text+0x1f): undefined reference to `sqrt'
collect2: error: ld returned 1 exit status

My aa.c content:

-------------------------------------------
#include<stdio.h>
#include<math.h>

int main(void)
{
  double x=4;

  printf("sqrt(4)=%f\n",sqrt(x));

  return 0;
}
-------------------------------------------

It seems that an option -lm cannot be placed in an arbitrary place which I used to
do. Is this intentional ?

Regards,

Piotr A. Dybczyński
-- 
/**************************************************************************
                          dr Piotr A. Dybczyński 
 homepage: https://www.dybczynski.pl/Piotr     e-mail: piotr@dybczynski.pl
********************************************************************PAD***/

Back to linux.debian.user | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

gcc-10: options order important? "Piotr A. Dybczyński" <piotr@dybczynski.pl> - 2021-09-03 12:30 +0200
  Re: gcc-10: options order important? Greg Wooledge <greg@wooledge.org> - 2021-09-03 13:40 +0200
  Re: gcc-10: options order important? Tixy <tixy@yxit.co.uk> - 2021-09-03 15:20 +0200
    Re: gcc-10: options order important? Greg Wooledge <greg@wooledge.org> - 2021-09-03 19:00 +0200
      Re: gcc-10: options order important? <tomas@tuxteam.de> - 2021-09-03 20:50 +0200
  Re: gcc-10: options order important? Tixy <tixy@yxit.co.uk> - 2021-09-03 15:20 +0200
  Re: gcc-10: options order important? Sven Joachim <svenjoac@gmx.de> - 2021-09-03 21:00 +0200

csiph-web