Re: Soft Float is not being reported

[Dimitry Andric <dimitry at andric dot com>]

On 2004-06-24 at 21:11:11 Dave wrote:

> # cat /opt/crosstool2/lib/gcc-lib/arm-linux/3.3.3/specs  | grep lgcc

> %{msoft-float:-lfloat}
> %{static|static-libgcc:-lgcc
> -lgcc_eh}%{!static:%{!static-libgcc:%{!shared:%
> {!shared-libgcc:-lgcc -lgcc_eh}%{shared-libgcc:-lgcc_s%M -lgcc}}%{shared:-lg
> cc_s%M}}}

> I removed the -lfloat section...


>  /opt/crosstool2/bin/arm-linux-gcc -o float float.c -msoft-float
> /opt/crosstool2/bin/../lib/gcc-lib/arm-linux/3.3.3/../../../../arm-linux/bin
> /ld: ERROR:
> /opt/crosstool2/bin/../lib/gcc-lib/arm-linux/3.3.3/libgcc.a(_addsubdf3.oS)
> uses FPA instructions, whereas float does not

> [...]

> So somehow gcc/glibc got built with FPA hardfloat?

Yes, since that is the default.  You might get away with rebuilding
glibc using CC="arm-linux-gcc -msoft-float", but that could cause
other problems.

The real solution would be building gcc with multilib support, so it
builds three separate versions (i.e. FPA hardfloat, FPA softfloat and
VFP softfloat) of libgcc and the other runtimes, but I've never
understood how to do this with glibc...  It doesn't seem to have
multilib support.

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