> How about changing the libdir default (currently $exec_prefix/lib) to be
> $exec_prefix/lib64 or $exec_prefix/lib/64, respectively, when
> - not cross-compiling, and
> - $CC $CPPFLAGS generates 64-bit mode object files, and
> - 64-bit mode object files are installed in /usr/lib64 or /usr/lib/64,
> not in /usr/lib ?
I think the right way would be to set the libdir default to
$exec_prefix/lib/`$CC -print-multi-os-directory $CFLAGS $CPPFLAGS`
possibly with magic to remove .. like this:
if test "$GCC" = yes; then
ac_multilibdir=`$CC -print-multi-os-directory $CFLAGS $CPPFLAGS`
else
ac_multilibdir=.
fi
case "$ac_multilibdir" in
# I don't know if the first two cases can happen, but it would be a
# bad idea to override $exec_prefix
/* | ../../* | .) libdir=lib ;;
../*) libdir=`echo $ac_multilibdir | sed 's/^...//' ` ;;
*) libdir=lib/$ac_multilibdir ;;
esac
libdir='${exec_prefix}/'$libdir
Paolo
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