Similar to how we do it for mpd now. This way, the selection is clearly
visible to the user, instead of the hidden selection we used to do in
the makefile.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
squashfs used the get_nprocs() GNU extension, instead of directly
calling sysconf(), breaking the build on uClibc.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Pass CFLAGS and LDFLAGS so that when building squashfs, it finds the
zlib installed in $(HOST_DIR).
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>