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Re: [avr-gcc-list] Another 2.97 question (linking with floating point)

From: Gunnar Henne
Subject: Re: [avr-gcc-list] Another 2.97 question (linking with floating point)
Date: Sat Jan 20 06:15:04 2001

Hello Larry,

Larry Barello schrieb:
> Why does Gunnar's distribution link with "libgcc" instead of "libm" in my
> application?

I think, its the normal behaviour to link only against libc.

> My code is not finding fplib that should be in libm.a  I am
> not sure where to start looking.

The answer ist quite simple, and nearly every new Linux-gcc programmer
has had  problems with ist:

To link libm.a you have to use the -lm (link math) switch to gcc.
I have just tried and stepped trough the sin library-code using
AvrStudio. :-)
(Nice new toy ;-)

Here are excerpts from my map file: (maybe

> /cygdrive/c/AVRGCC/BIN/../lib/gcc-lib/avr/2.97/../../../../avr/bin/ld.exe:
> region text is full (NewBot.elf section .text)
This does not look good.

How do you generate the map output?



Gunnar Henne                      Email: address@hidden
oTRIs GmbH & Co. KG               Tel. : 0231 / 10616-21
Landgrafenstr. 153                Fax. : 0231 / 10615-44
44139 Dortmund

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