[CFLAGS="$CFLAGS $libzip_CFLAGS"; LIBS="$LIBS $libzip_LIBS";
SR_PKGLIBS="$SR_PKGLIBS libzip"])
+# libserialport is always needed. Abort if it's not found.
+PKG_CHECK_MODULES([libserialport], [libserialport >= 0.1],
+ [CFLAGS="$CFLAGS $libserialport_CFLAGS"; LIBS="$LIBS $libzip_LIBS";
+ SR_PKGLIBS="$SR_PKGLIBS libserialport"])
+
# libusb-1.0 is only needed for some hardware drivers. Disable the respective
# drivers if it is not found.
case "$host" in