+DEPDIRS-ring = $(core-libs)
+DIRS-$(CONFIG_RTE_LIBRTE_SFC_EFX_PMD) += sfc
+DEPDIRS-sfc = $(core-libs)
+DIRS-$(CONFIG_RTE_LIBRTE_PMD_SZEDATA2) += szedata2
+DEPDIRS-szedata2 = $(core-libs)
+DIRS-$(CONFIG_RTE_LIBRTE_PMD_TAP) += tap
+DEPDIRS-tap = $(core-libs)
+DIRS-$(CONFIG_RTE_LIBRTE_THUNDERX_NICVF_PMD) += thunderx
+DEPDIRS-thunderx = $(core-libs)