[Bug d/106977] [13 regression] d21 dies with SIGBUS on 32-bit Darwin

["ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106977

--- Comment #2 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #1 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
> Is there a (sort of simple) bootstrap process one can follow for 32-bit OSX?
>
> I have the means to test locally, but I can't get much further than building
> gdc-11 -m32 - using said compiler to bootstrap mainline fails for non-D related
> reasons when building stage1.

I'm just using gdc 11.2.1 as of
1250dcee74985eaeacae3b85e5ec78937225d322, configure with

/vol/gcc/src/hg/gcc-11-branch/local/configure --prefix=/vol/gcc-11
--enable-objc-gc --with-gmp-include=/vol/gcc/include
--with-gmp-lib=/vol/gcc/lib/amd64 --with-mpfr-include=/vol/gcc/include
--with-mpfr-lib=/vol/gcc/lib/amd64 --with-mpc-include=/vol/gcc/include
--with-mpc-lib=/vol/gcc/lib/amd64 --with-target-bdw-gc-include=/vol/gcc/include
--with-target-bdw-gc-lib=/vol/gcc/lib/amd64,i386=/vol/gcc/lib
--enable-libphobos --enable-languages=c,ada,c++,d,fortran,lto,objc,obj-c++

Most of this can be ignored for the issue at hand.  I think only
--enable-languages=d (if at all) and --enable-libphobos are required.

The 11.3 release should do just fine, I believe.

Apart from that, nothing springs to mind immediately.

My builds are on Mac OS X 10.7/Darwin 11 still.  What macOS version are
you trying this on?  FWIW, I gave up on 32-bit builds with macOS
10.14/Darwin 18 when Apple made it close to impossible to build 32-bit
software.