Re: default $(libdir) and bi-arch systems

[Bruno Haible]

Paolo Bonzini wrote:
> I think the right way would be to set the libdir default to
> 
> $exec_prefix/lib/`$CC -print-multi-os-directory $CFLAGS $CPPFLAGS`

Thanks for mentioning -print-multi-os-directory; it is currently undocumented
but appears to fit the bill on Linux/x86_64 machines:

$ gcc -print-multi-os-directory
../lib64
$ gcc -print-multi-os-directory -m64
../lib64
$ gcc -print-multi-os-directory -m32
../lib
$ gcc -print-multi-directory
.
$ gcc -print-multi-directory -m64
.
$ gcc -print-multi-directory -m32
32

Some care needs to be taken, though, because the gcc compiler on MacOS X 10.5
(which produces 32-bit code by default) is configured like this:

$ gcc -print-multi-os-directory
.
$ gcc -print-multi-os-directory -m64
x86_64
$ gcc -print-multi-os-directory -m32
.
$ gcc -print-multi-directory
.
$ gcc -print-multi-directory -m64
x86_64
$ gcc -print-multi-directory -m32
.

Bruno