[Posted for completeness] After no useful help here or through the Ubuntu forums, I worked it out. Solution was simple: set CFLAGS to -m64 before configure. Strange, as the previously installed gcc produced 64 bit execs by default. On Tue, 2007-02-27 at 19:47 +0100, Terry Frankcombe wrote: > Hi folks > > I've run into trouble trying to compile gcc 4.2 (gcc-4.2-20070221) on an > amd64 machine running 64 bit Ubuntu. I configure with: > > ./configure --disable-multilibs --enable-languages=fortran > > then doing a make gets as far as compiling ../.././gcc/crtstuff.c in > gcc-4.2-20070221/host-x86_64-unknown-linux-gnu/gcc. /usr/include/gnu/stubs.h is included which then tries to include gnu/stubs-32.h, which doesn't exist, rather than gnu/stubs-64.h, which does. Thus apparently __WORDSIZE is defined as 32. > > Now Ubuntu has 64 bit libraries in /usr/lib and 32 bit libraries > in /usr/lib32 (with a simlink from /usr/lib64 to /usr/lib). > > Any ideas about how I can coerce configure to set things up correctly to > build a 64 bit compiler? > > Ciao > Terry >
