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| From | Keith Thompson <kst-u@mib.org> |
| Newsgroups | comp.lang.c |
| Subject | Re: Need help with an odd error... |
| Date | Sun, 24 May 2015 15:38:46 -0700 |
| Organization | None to speak of |
| Lines | 36 |
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"Chris M. Thomasson" <cristom@charter.net> writes:
[...]
> #include <math.h>
> #include <stdio.h>
>
> double
> my_cos(double v)
> {
> return cos(v);
> }
>
> int main()
> {
> printf("my_cos(3.14) = %f\r\n", my_cos(3.14));
>
> return 0;
> }
[...]
> sh-4.3# gcc -o main *.c
>
> /tmp/ccXNUoFK.o: In function `my_cos':
>
> main.c:(.text+0x1b): undefined reference to `cos'
Compile with:
gcc -o main *.c -lm
(Prepare for a flame war over whether the need to specify "-lm" when
using the math library is a bug or not.)
--
Keith Thompson (The_Other_Keith) kst-u@mib.org <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something. This is something. Therefore, we must do this."
-- Antony Jay and Jonathan Lynn, "Yes Minister"
Back to comp.lang.c | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
Need help with an odd error... "Chris M. Thomasson" <cristom@charter.net> - 2015-05-24 15:26 -0700
Re: Need help with an odd error... Keith Thompson <kst-u@mib.org> - 2015-05-24 15:38 -0700
Re: Need help with an odd error... Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-05-24 23:39 +0100
Re: Need help with an odd error... James Kuyper <jameskuyper@verizon.net> - 2015-05-24 18:53 -0400
Re: Need help with an odd error... Stephen Sprunk <stephen@sprunk.org> - 2015-05-24 19:15 -0500
Re: Need help with an odd error... "Chris M. Thomasson" <cristom@charter.net> - 2015-05-24 16:18 -0700
Re: Need help with an odd error... "Chris M. Thomasson" <cristom@charter.net> - 2015-05-24 16:54 -0700
Re: Need help with an odd error... Johannes Bauer <dfnsonfsduifb@gmx.de> - 2015-05-27 19:48 +0200
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