[OpenBIOS] Solaris anyone? Q2

[Blue Swirl]

On Fri, Apr 29, 2011 at 1:26 AM, Nathan Kunkee <nkunkee42 at hotmail.com> wrote:
>> >>
>> >>> I built that on opensolaris (so sparc64) with gcc 4.5.2. No
>> >>> cross-compiler needed, although the config script thinks I'm using
>> >>> one.
>> >>
>> >> Ah that will probably be the problem - config/script/switch-arch
>> >> contains
>> >> the logic which detects how NATIVE_BITWIDTH_EQUALS_HOST_BITWIDTH and
>> >> SWAP_ENDIANNESS should be set and adds them to CFLAGS in
>> >> Makefile.target as
>> >> appropriate.
>> >>
>> > OK. I'll start looking to see how to change that for by build
>> > environment.
>>
>> What does 'uname -m' report on your machine? We only check for
>> sun4u/sparc64 or sparc/sparc32.
>>
>
> nathan at valhalla:/export/home/nathan/$ uname -m
> sun4u
> nathan at valhalla:/export/home/nathan/$ uname -mpi
> sun4u sparc sun4u
>
> From SVN, the switch-arch script thinks it has to use a cross-compiler:
>
> nathan at valhalla:/export/home/nathan/openbios-devel$ env LANG=C sh -x
> ./config/scripts/switch\-arch sparc32
> + MOLPATH=/export/home/nathan//mol-0.9.71
> + [ xsparc32 = x -o sparc32 = -help ]
> + test -f utils/dist/debian/rules
> + chmod 755 utils/dist/debian/rules
> + chmod 755 config/scripts/switch-arch
> + chmod 755 config/scripts/reldir
> + test x = x
> + archname
> + + head VERSION
> VERSION=1.0
> + echo Configuring OpenBIOS on sparc64 for sparc32
> Configuring OpenBIOS on sparc64 for sparc32
> + target_list=
> + target_list= builtin-sparc32 unix-sparc32
> + arch_list=
> + + echo builtin-sparc32
> + sed s/.*-//g
> arch=sparc32
> + test -f config/examples/sparc32_config.xml
> + grep -q sparc32
> + echo
> + arch_list= sparc32
> + + echo unix-sparc32
> + sed s/.*-//g
> arch=sparc32
> + test -f config/examples/sparc32_config.xml
> + grep -q sparc32
> + echo sparc32
> + unix=no
> + builtin=no
> + plain=no
> + mol=no
> + briq=no
> + pearpc=no
> + qemu=no
> + xbox=no
> + cross=no
> + :
> + builtin=yes
> + :
> + [ sparc32 != sparc64 ]
> + continue
> + BASEARCH=sparc32
> + select_prefix sparc
> ERROR: no sparc cross-compiler found !
>
> I got around that by adding the suffix my build of gcc is using:
>
> --- config/scripts/switch-arch  Thu Apr 28 17:18:40 2011
> +++ config/scripts/switch-arch-works    Sat Apr 23 20:21:29 2011
> @@ -97,7 +101,7 @@
>
>  select_prefix()
>  {
> -    for TARGET in ${1}-linux-gnu- ${1}-linux- ${1}-elf- ${1}-eabi-
> +    for TARGET in ${1}-linux-gnu- ${1}-linux- ${1}-elf- ${1}-eabi-
> ${1}-sun-solaris2.11-
>      do
>          if type ${TARGET}gcc > /dev/null 2>&1
>          then
>
> I'm not sure if that is the best way to get it to use the native compiler. I
> can't think of a reason my sparc64 build tools couldn't build the sparc32
> image.

This actually happens with OpenBSD/sparc64, the compiler can't produce
32 bit binaries at all:
$ gcc -v
Reading specs from /usr/lib/gcc-lib/sparc64-unknown-openbsd4.8/4.2.1/specs
Target: sparc64-unknown-openbsd4.8
Configured with: OpenBSD/sparc64 system compiler
Thread model: posix
gcc version 4.2.1 20070719
$ touch empty.c
$ gcc -m32 -c empty.c
empty.c:1: error: -m32 is not supported by this configuration

But I think that this is not so common setup. So we should add logic
for trying -m32 or -m64 if the host has a compatible CPU except for
word size, or a cross compiler for wrong word size is found.