> You need a bi-arch system, that is, one that has the system libraries both in > a > 64-bit variant and in a 32-bit variant (typically in /lib64 and /lib, > respectively).
> For compiling in 32-bit mode, I use > ./configure --host=i686-pc-linux-gnu \ > --prefix=/arch/x86-linux/gnu \ > CC="gcc -m32 -march=i586" \ > CXX="g++ -m32 -march=i586" \ > LDFLAGS="-m32" Hello, I'm curious about why setting "--host=i686-pc-linux-gnu" is not enough to achieve cross compiling and why in that case it's not up to autoconf to add "-m32" to CC. I know the autoconf manual says you're better of using CC="gcc -m32" or CC="gcc -m64" (see http://www.gnu.org/software/autoconf/manual/autoconf.html#index-CFLAGS-79 ). But somehow, it feels weird to write CC="gcc -m32" when one purpose of autoconf is actually to select a compiler for you. Isn't there another way around CC="gcc -m32" or CFLAGS="-m32"? Or are -m32 and -m64 peculiarities of GCC only? Regards, Gregory
