+ifeq ($(NO_PKG_CONFIG),)
+NL3xFOUND := $(shell $(PKG_CONFIG) --atleast-version=3.2 libnl-3.0 && echo Y)
+ifneq ($(NL3xFOUND),Y)
+NL31FOUND := $(shell $(PKG_CONFIG) --exact-version=3.1 libnl-3.1 && echo Y)
+ifneq ($(NL31FOUND),Y)
+NL3FOUND := $(shell $(PKG_CONFIG) --atleast-version=3 libnl-3.0 && echo Y)
+ifneq ($(NL3FOUND),Y)
+NL2FOUND := $(shell $(PKG_CONFIG) --atleast-version=2 libnl-2.0 && echo Y)
+ifneq ($(NL2FOUND),Y)
+NL1FOUND := $(shell $(PKG_CONFIG) --atleast-version=1 libnl-1 && echo Y)
+endif
+endif
+endif
+endif
+
+ifeq ($(NL1FOUND),Y)
+NLLIBNAME = libnl-1
+endif
+
+ifeq ($(NL2FOUND),Y)
+CFLAGS += -DCONFIG_LIBNL20
+LIBS += -lnl-genl
+NLLIBNAME = libnl-2.0
+endif
+
+ifeq ($(NL3xFOUND),Y)
+# libnl 3.2 might be found as 3.2 and 3.0
+NL3FOUND = N
+CFLAGS += -DCONFIG_LIBNL30
+LIBS += -lnl-genl-3
+NLLIBNAME = libnl-3.0
+endif
+
+ifeq ($(NL3FOUND),Y)
+CFLAGS += -DCONFIG_LIBNL30
+LIBS += -lnl-genl
+NLLIBNAME = libnl-3.0
+endif
+
+# nl-3.1 has a broken libnl-gnl-3.1.pc file
+# as show by pkg-config --debug --libs --cflags --exact-version=3.1 libnl-genl-3.1;echo $?
+ifeq ($(NL31FOUND),Y)
+CFLAGS += -DCONFIG_LIBNL30
+LIBS += -lnl-genl
+NLLIBNAME = libnl-3.1
+endif
+
+ifeq ($(NLLIBNAME),)
+$(error Cannot find development files for any supported version of libnl)
+endif
+
+LIBS += $(shell $(PKG_CONFIG) --libs $(NLLIBNAME))
+CFLAGS += $(shell $(PKG_CONFIG) --cflags $(NLLIBNAME))
+endif # NO_PKG_CONFIG
+