Find libxcryt through pkg-config to avoid the following build failure: /home/buildroot/autobuild/run/instance-3/output-1/host/opt/ext-toolchain/bin/../lib/gcc/riscv64-buildroot-linux-musl/10.2.0/../../../../riscv64-buildroot-linux-musl/bin/ld: .libs/passverify.o: in function `.L30': passverify.c:(.text+0x368): undefined reference to `crypt_checksalt' Fixes: - http://autobuild.buildroot.org/results/20b14e222b35c2d1269960075832b784ba81aa1a Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com> Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr> (cherry picked from commit 2962697039c72583d1e57e2b61b6281896f5b761) Signed-off-by: Peter Korsgaard <peter@korsgaard.com>