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.