[dpdk-dev] [PATCH 1/2] mk: Eliminate possible duplicates from LDLIBS

[Panu Matilainen]

Duplicates in LDLIBS can cause link failures from multiply defined
symbols, ensure all libraries are only mentioned once. Can't use
sorting for duplicate elimination as order is critical so awk one-liner
is used.

Signed-off-by: Panu Matilainen <pmatilai at redhat.com>
---
 mk/rte.app.mk | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mk/rte.app.mk b/mk/rte.app.mk
index a1cd9a3..f4eb5e8 100644
--- a/mk/rte.app.mk
+++ b/mk/rte.app.mk
@@ -174,6 +174,9 @@ _LDLIBS-y += --no-whole-archive
 
 LDLIBS += $(_LDLIBS-y) $(CPU_LDLIBS) $(EXTRA_LDLIBS)
 
+# Eliminate duplicates without sorting
+LDLIBS := $(shell echo $(LDLIBS) | awk '{for (i = 1; i <= NF; i++) { if (!seen[$$i]++) print $$i }}')
+
 .PHONY: all
 all: install
 
-- 
2.5.0