Re: Trying to build gcc-4.1.2+gm2-20200507 on MacOS 10.5.8 (G5)

[john o goyo]

Greetings, Gaius.

On 10/06/2020 03:46, Gaius Mulley wrote:
> Hi John,
>
> would it be possible to build a later version of gcc and use this to
> bootstrap a later gm2 release? There was a huge amount of internal
> changes between 4.1.2 and 4.7.4 (in gm2 and also gcc) - which would make
> back porting a significant undertaking :-)

Well, I can build gcc-4.7.4 on the G5 without problems but trying to 
build gm2 yields something reminiscent of the problem on Sparc:

bash 
../../../src/gcc-4.7.4+gm2-20200604/gm2/gcc-versionno/gcc/gm2/tools-src/makeSystem 
-fpim \
             
../../../src/gcc-4.7.4+gm2-20200604/gm2/gcc-versionno/gcc/gm2/gm2-libs/SYSTEM.def 
\
             
../../../src/gcc-4.7.4+gm2-20200604/gm2/gcc-versionno/gcc/gm2/gm2-libs/SYSTEM.mod 
\
             
-I../../../src/gcc-4.7.4+gm2-20200604/gm2/gcc-versionno/gcc/gm2/gm2-libs \
             "/Users/build/bld/gm2-4.7.4-20200604/./gcc/xgm2 
-B/Users/build/bld/gm2-4.7.4-20200604/./gc  " 
/Users/build/bld/gm2-4.7.4-20200604/gcc/gm2/gm2-libs/SYSTEM.def
In function '_M2_SYSTEM_init':
cc1gm2: internal compiler error: Bus error
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
SYSTEM module creates type: LOC
SYSTEM module creates type: WORD
[...]
SYSTEM module creates type: COMPLEX96
SYSTEM module creates type: COMPLEX128
In function '_M2_SYSTEM_init':
cc1gm2: internal compiler error: Bus error
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make[2]: *** 
[/Users/build/bld/gm2-4.7.4-20200604/gcc/gm2/gm2-libs/SYSTEM.def] Error 1
make[1]: *** [all-gcc] Error 2

> Another thought - might it be possible to cross compile gcc for darwin
> on a GNU/Linux box maybe?
>
> Using something like
> https://devs.openttd.org/~truebrain/compile-farm/apple-darwin9.txt
>
> regards,
> Gaius
I have no Linux boxes at the moment.  (However, I do have an SB2000 not 
in use on which I will try to install Debian -- TBD.)

Two closing remarks:

1. Have you, or anyone on this list, built a recent gm2 on a big-endian 
machine?

2. The gcc+gm2 build failed early due to a missing function 
lang_register_spec_functions() in gcc.c.  Not finding it elsewhere, I 
added it with a void body to gcc.c.

Sincerely,
john