Some GNU systems (including Debian) do not use /usr/lib64. This change
makes it easier to have the Xen build system on amd64 put its 64-bit
libraries files in /usr/lib.
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
INCLUDEDIR = $(PREFIX)/include
LIBLEAFDIR = lib
LIBLEAFDIR_x86_32 = lib
-LIBLEAFDIR_x86_64 = lib64
+LIBLEAFDIR_x86_64 ?= lib64
LIBDIR = $(PREFIX)/$(LIBLEAFDIR)
LIBDIR_x86_32 = $(PREFIX)/$(LIBLEAFDIR_x86_32)
LIBDIR_x86_64 = $(PREFIX)/$(LIBLEAFDIR_x86_64)