Hi, (This message started out as a question, but I managed to figure it out. Still, I think people might want to know.) I have figured out how to build a 64-bit GCC 4.3.2 on Solaris AMD64. I wanted to build a 64 bit compiler (I mean, one where the compiler executables are 64 bit) for performance. I found this: http://gcc.gnu.org/ml/gcc-help/2008-12/msg00103.html which explained why supplying CC='gcc -m64' to configure didn't work. So then I tried this: ../gcc-4.3.2/configure --prefix=/usr/local/gcc-4.3.2 --with-gnu-as --with-as=/usr/local/gnu/bin/as --without-gnu-ld --with-ld=/usr/ccs/bin/ld --enable-languages=c,c++ CFLAGS='-m64 -g -O2' BOOT_CFLAGS='-m64 -g -O2' LDFLAGS='-L/usr/local/lib/64' BOOT_LDFLAGS='-L/usr/local/lib/64' only to find that the BOOT_CFLAGS and BOOT_LDFLAGS don't actually get edited into the top-level Makefile. Okay fine, I edited the Makefile by hand and kicked off the build. But the '-m64' still doesn't propagate to all the right places; gcc/build/genmodes.o comes out as 32 bit, and the build dies because it can't link with the built libiberty. Supplying CC='gcc -m64' in addition to CFLAGS fixed that problem, but I found out I also needed to set CXXFLAGS. So here's the configure line that worked: ../gcc-4.3.2/configure --prefix=/usr/local/gcc-4.3.2 --with-gnu-as --with-as=/usr/local/gnu/bin/as --without-gnu-ld --with-ld=/usr/ccs/bin/ld --enable-languages=c,c++ CC='gcc -m64' CFLAGS='-m64 -g -O2' CXXFLAGS='-m64 -g -O2' LDFLAGS='-L/usr/local/lib/64' The steps are: () Run configure as above () Hand-edit the top-level Makefile, setting BOOT_CFLAGS and BOOT_LDFLAGS like CFLAGS and LDFLAGS () Start the make Seems like there's a general problem here of building a 64-bit compiler in an environment where the default is 32 bits. I think it should be easier. Maybe it deserves a specific configure option? -- Scott
