Re: Non-FPU 68000 libm.a

["Doug Broadwell" <dougb at value dot net>]

This is the command line I use.  I do include -m68000 and -msoft-float.  If
I do not specifically include the libm.a on the command line I get unfound
reference errors from my one floating point operation (sqrt), so it does not
automatically link in libm.

Also, horrors of horrors, even the .../m68000/libm.a has non-68000
instructions in it, e.g., bpls and bsrl (op codes 6a04 and 61ff
respectively) !  It seems as if newlib has not made a 68000 non-FPU math
library.

$GCCBIN/m68k-coff-gcc -nostartfiles -O2 -fno-builtin -Xlinker -T -Xlinker
../lib/proto.ld \

  -o main.coff -m68000 -msoft-float stubs.c \

  init.c power.c interrupts.c buttons.c run.c demo.c timer.c \

  main.c error.c graph.c util.c sound.c dispatch.c count.c menu.c version.c
\

  $GCCBASE/m68k-coff/lib/m68000/libc.a $GCCBASE/m68k-coff/lib/m68000/libm.a


Help.

Thanks, Doug Broadwell

----- Original Message -----
From: "yy_tseng" <yy_tseng@goodwill.com.tw>
To: "Doug Broadwell" <dougb@value.net>
Sent: Monday, October 21, 2002 10:13 PM
Subject: Re: Non-FPU 68000 libm.a


> Hello Doug Broadwell,
>
>     You should link your program with correct liberary.
>
>     Change your CFLAGS with -mc68000 ,since you don't have FPU.
>
>     the option -msoft-float is force to soft-float while using with FPU .
>
>
> ----- Original Message -----
> From: "Doug Broadwell" <dougb@value.net>
> To: "Newlib Mail List" <newlib@sources.redhat.com>
> Sent: Tuesday, October 22, 2002 10:30 AM
> Subject: Non-FPU 68000 libm.a
>
>
> > Hi,
> >
> > I'm getting "address errors" that seem to be coming from linking a
libm.a
> > that is assuming that there's an FPU.  The libm.a in both .../m68000 and
> > .../msoft-float all seem to reference (in the assembly code) floating
> point
> > registers; %fpA, %fp0, %fp1, etc.  Is there no math library built that
> > doesn't assume an FPU?
> >
> > Thanks,
> > Doug Broadwell
> >
> >
>
>