MorphZone

Missing atan2() function

Minuous

# 1
Order of the Butterfly

Posts: 163 from 2010/2/12

I'm #including <math.h> but still getting this error message from GCC:
undefined reference to `atan2'
This code used to compile before I had to reformat and reinstall everything. Am I missing some component?
It compiles fine under OS3.9 (SAS/C) and Windows (Visual C), just not MOS.
Isn't atan2() part of ANSI C (C89)?
»02.05.14 - 11:34

BSzili

# 2
Priest of the Order of the Butterfly

Posts: 559 from 2012/6/8

From: Hungary

Are you linking against libm.a? (-lm)
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»02.05.14 - 11:40

pegasos-sigi2

# 3
Order of the Butterfly

Posts: 265 from 2006/8/31

You must define your own function. Atan2 did't exists in ANSI C of MorphOS
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»02.05.14 - 13:51

bigfoot

# 4
MorphOS Developer

Posts: 510 from 2003/4/11

Quote:

pegasos-sigi2 wrote:
You must define your own function. Atan2 did't exists in ANSI C of MorphOS

Sorry, this is not true. MorphOS' libm does have the atan2() function. BSzili's answer is likely the correct one.
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»02.05.14 - 17:11

Minuous

# 5
Order of the Butterfly

Posts: 163 from 2010/2/12

Yes, -lm fixes the issue. Many thanks to you all.
»03.05.14 - 00:16