From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Monjalon <thomas.monjalon@6wind.com>
Subject: Re: Compiling DPDK is not working on Red Hat 6.7
Date: Tue, 12 Jul 2016 14:15:39 +0200
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Cc: dev@dpdk.org, Christian Ehrhardt <christian.ehrhardt@canonical.com>
To: Raslan Darawsheh <rasland@mellanox.com>
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Hi,

2016-07-12 11:35, Raslan Darawsheh:
> I think the option is there as you see:
> 
[...]
> -Wl,--as-needed  -Wl,-lrt -Wl,-lm |...] -Wl,-lrte_eal
[...]
> eal_timer.c:(.text+0x152): undefined reference to `clock_gettime'

I suspect we need -lrt after -lrte_eal.

Please could you try the following patch?


--- a/mk/rte.app.mk
+++ b/mk/rte.app.mk
@@ -176,6 +176,8 @@ ifeq ($(RTE_DEVEL_BUILD)$(CONFIG_RTE_BUILD_SHARED_LIB),yy)
 LDFLAGS += -rpath=$(RTE_SDK_BIN)/lib
 endif
 
+MAPFLAGS = -Map=$@.map --cref
+
 .PHONY: all
 all: install
 
@@ -190,15 +192,13 @@ build: _postbuild
 exe2cmd = $(strip $(call dotfile,$(patsubst %,%.cmd,$(1))))
 
 ifeq ($(LINK_USING_CC),1)
-override EXTRA_LDFLAGS := $(call linkerprefix,$(EXTRA_LDFLAGS))
-O_TO_EXE = $(CC) $(CFLAGS) \
-	$(call linkerprefix,$(LDLIBS)) \
-	$(call linkerprefix,$(LDFLAGS)) $(LDFLAGS_$(@)) $(EXTRA_LDFLAGS) \
-	-Wl,-Map=$(@).map,--cref -o $@ $(OBJS-y)
+O_TO_EXE = $(CC) -o $@ $(CFLAGS) $(OBJS-y) $(call linkerprefix, \
+	$(LDLIBS) $(LDFLAGS) $(LDFLAGS_$(@)) $(EXTRA_LDFLAGS) \
+	$(MAPFLAGS))
 else
-O_TO_EXE = $(LD) $(LDLIBS) \
-	$(LDFLAGS) $(LDFLAGS_$(@)) $(EXTRA_LDFLAGS) \
-	-Map=$(@).map --cref -o $@ $(OBJS-y)
+O_TO_EXE = $(LD) -o $@ $(OBJS-y)
+	$(LDLIBS) $(LDFLAGS) $(LDFLAGS_$(@)) $(EXTRA_LDFLAGS) \
+	$(MAPFLAGS)
 endif
 O_TO_EXE_STR = $(subst ','\'',$(O_TO_EXE)) #'# fix syntax highlight
 O_TO_EXE_DISP = $(if $(V),"$(O_TO_EXE_STR)","  LD $(@)")