SuperH Linux Math library  Embedded
This is a discussion on SuperH Linux Math library  Embedded ; Hi all,
I'm trying to compile a small program (IIR oscillator) and want to use
atan, cos and sin functions including the math.h library. The compiler
doesn't complain about not finding the math.h file, indeed he finds it.
But:
he@so:~/codec$ ...

SuperH Linux Math library
Hi all,
I'm trying to compile a small program (IIR oscillator) and want to use
atan, cos and sin functions including the math.h library. The compiler
doesn't complain about not finding the math.h file, indeed he finds it.
But:
he@so:~/codec$ sh3linuxgcc I /usr/sh3linux/include codec.c
/tmp/ccUqutnQ.o: In function `main':
/tmp/ccUqutnQ.o(.text+0x180): undefined reference to `atan'
/tmp/ccUqutnQ.o(.text+0x19c): undefined reference to `cos'
/tmp/ccUqutnQ.o(.text+0x1a0): undefined reference to `sin'
collect2: ld returned 1 exit status
What's wrong?
Thank you.
Ivan.

Re: SuperH Linux Math library
Ivan Wagner wrote:
> Hi all,
>
> I'm trying to compile a small program (IIR oscillator) and want to use
> atan, cos and sin functions including the math.h library. The compiler
> doesn't complain about not finding the math.h file, indeed he finds it.
>
> But:
>
> he@so:~/codec$ sh3linuxgcc I /usr/sh3linux/include codec.c
> /tmp/ccUqutnQ.o: In function `main':
> /tmp/ccUqutnQ.o(.text+0x180): undefined reference to `atan'
> /tmp/ccUqutnQ.o(.text+0x19c): undefined reference to `cos'
> /tmp/ccUqutnQ.o(.text+0x1a0): undefined reference to `sin'
> collect2: ld returned 1 exit status
>
> What's wrong?
>
> Thank you.
>
> Ivan.
>
you need lm in your build command line to tell the linker to use the
math library.

Re: SuperH Linux Math library
Oh yeah you're right... It's long time since I did this last time...
Thank you,
Ivan.
Tim Keck wrote:
> Ivan Wagner wrote:
> > Hi all,
> >
> > I'm trying to compile a small program (IIR oscillator) and want to use
> > atan, cos and sin functions including the math.h library. The compiler
> > doesn't complain about not finding the math.h file, indeed he finds it.
> >
> > But:
> >
> > he@so:~/codec$ sh3linuxgcc I /usr/sh3linux/include codec.c
> > /tmp/ccUqutnQ.o: In function `main':
> > /tmp/ccUqutnQ.o(.text+0x180): undefined reference to `atan'
> > /tmp/ccUqutnQ.o(.text+0x19c): undefined reference to `cos'
> > /tmp/ccUqutnQ.o(.text+0x1a0): undefined reference to `sin'
> > collect2: ld returned 1 exit status
> >
> > What's wrong?
> >
> > Thank you.
> >
> > Ivan.
> >
>
> you need lm in your build command line to tell the linker to use the
> math library.