Use pkg-config to retrieve libusb dependencies such as -latomic and avoid the following static build failure raised since bump of libusb to version 1.0.25 in commitaad609936f: /nvmedata/autobuild/instance-29/output-1/per-package/libftdi1/host/bin/../lib/gcc/sparc-buildroot-linux-uclibc/10.3.0/../../../../sparc-buildroot-linux-uclibc/bin/ld: /nvmedata/autobuild/instance-29/output-1/per-package/libftdi1/host/sparc-buildroot-linux-uclibc/sysroot/lib/libusb-1.0.a(core.o): in function `libusb_unref_device': /nvmedata/autobuild/instance-29/output-1/build/libusb-1.0.25/libusb/core.c:1186: undefined reference to `__atomic_fetch_add_4' Fixes: - http://autobuild.buildroot.org/results/1ca7cd85ae60ad4797a6d8a83b2fb51d7eab96d9 Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com> Reviewed-by: Yegor Yefremov <yegorslists@googlemail.com> Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr> (cherry picked from commitde82d57b56) Signed-off-by: Peter Korsgaard <peter@korsgaard.com>