Re: gcc 4.x and support of x87 FPU in libstdc++

[Denis K <deniskravtsov at gmail dot com>]

Thank you, I think it worked (but I also patched ssemath.h locally, so
need to roll back and recompile again to make sure). Though I'm not
exactly sure why I didn't get an error from configure. I'm not very
familiar with the syntax used but I was thinking that

case ${with_fpmath} in
  avx)
    tm_file="${tm_file} i386/avxmath.h"
    ;;
  sse)
    tm_file="${tm_file} i386/ssemath.h"
    ;;
  *)
    echo "Invalid --with-fpmath=$with_fpmath" 1>&2
    exit 1

Only allows for avx or sse and any other option should result in the
default case leading to a failure.


On 12 January 2014 15:50, H.J. Lu <hjl.tools@gmail.com> wrote:
> On Sun, Jan 12, 2014 at 7:42 AM, Denis K <deniskravtsov@gmail.com> wrote:
>> My settings were taken from the comment here:
>> http://stackoverflow.com/questions/9450394/how-to-install-gcc-from-scratch-with-gmp-mpfr-mpc-elf-without-shared-librari
>>
>> --disable-shared
>>   --disable-bootstrap
>>   --disable-libstdcxx-pch
>>   --enable-languages=all
>>   --enable-libgomp
>>   --enable-lto
>>   --enable-threads=posix
>>   --enable-tls
>>   --with-gmp=/tmp/gcc
>>   --with-mpfr=/tmp/gcc
>>   --with-mpc=/tmp/gcc
>>   --with-libelf=/tmp/gcc
>>   --with-fpmath=sse
>>
>
> Please remove " --with-fpmath=sse".
>
>
> --
> H.J.