------- Comment #8 from ebotcazou at gcc dot gnu dot org 2009-12-29 19:29 ------- > I then try to build GCC4.4.2[x86_64-apple-darwin10.2.0] using > GCC4.4.2[i386-apple-darwin10.2.0], with the reported results. > > [...] > > I've been using --build=x86_64-apple-darwin10.2.0 to indicate that I want to > build a 64-bit compiler, is that not the right method?
--build=xxx means you're using a xxx compiler to build. Since you apparently don't have a x86_64 compiler at hand but only a i386, you cannot do that. You first need to build a i386 -> x86-64 cross-compiler (--host=i386-apple-* --target=x86_64-apple-*) with the base i386 compiler and then use the resulting compiler to build a native x86-64 compiler (--build=x86_64-apple-*). -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42518
