mk: fix lib filtering when linking app

[dpdk.git] / mk / rte.app.mk

diff --git a/mk/rte.app.mk b/mk/rte.app.mk
index fcc3a57..4c659e9 100644 (file)
--- a/mk/rte.app.mk
+++ b/mk/rte.app.mk
@@ -186,10 +186,21 @@ _LDLIBS-y += $(EXECENV_LDLIBS)
 
 LDLIBS += $(_LDLIBS-y) $(CPU_LDLIBS) $(EXTRA_LDLIBS)
 
-# Eliminate duplicates without sorting
-LDLIBS := $(shell echo $(LDLIBS) | \
-       awk '{for (i = 1; i <= NF; i++) { \
-               if ($$i !~ /^-l.*/ || !seen[$$i]++) print $$i }}')
+# all the words except the first one
+allbutfirst = $(wordlist 2,$(words $(1)),$(1))
+
+# Eliminate duplicates without sorting, only keep the last occurrence
+filter-libs = \
+       $(if $(1),$(strip\
+               $(if \
+                       $(and \
+                               $(filter $(firstword $(1)),$(call allbutfirst,$(1))),\
+                               $(filter -l%,$(firstword $(1)))),\
+                       ,\
+                       $(firstword $(1))) \
+               $(call filter-libs,$(call allbutfirst,$(1)))))
+
+LDLIBS := $(call filter-libs,$(LDLIBS))
 
 ifeq ($(RTE_DEVEL_BUILD)$(CONFIG_RTE_BUILD_SHARED_LIB),yy)
 LDFLAGS += -rpath=$(RTE_SDK_BIN)/lib