[PATCH 2/3] mk: use LDLIBS when linking shared libraries

[Sergio Gonzalez Monroy <sergio.gonzalez.monroy-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>]

Set proper DT_NEEDED entries for shared libraries by explicitly
linking against its dependent libraries (LDLIBS).

Signed-off-by: Sergio Gonzalez Monroy <sergio.gonzalez.monroy-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
---
 mk/rte.lib.mk | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/mk/rte.lib.mk b/mk/rte.lib.mk
index 0d7482d..5d0988f 100644
--- a/mk/rte.lib.mk
+++ b/mk/rte.lib.mk
@@ -62,10 +62,13 @@ build: _postbuild
 
 exe2cmd = $(strip $(call dotfile,$(patsubst %,%.cmd,$(1))))
 
+_LDLIBS := --as-needed $(LDLIBS) $(EXECENV_LDLIBS) --no-as-needed
+
 ifeq ($(LINK_USING_CC),1)
 # Override the definition of LD here, since we're linking with CC
 LD := $(CC) $(CPU_CFLAGS)
 _CPU_LDFLAGS := $(call linkerprefix,$(CPU_LDFLAGS))
+_LDLIBS := $(call linkerprefix,$(_LDLIBS))
 else
 _CPU_LDFLAGS := $(CPU_LDFLAGS)
 endif
@@ -79,7 +82,8 @@ O_TO_A_DO = @set -e; \
 	$(O_TO_A) && \
 	echo $(O_TO_A_CMD) > $(call exe2cmd,$(@))
 
-O_TO_S = $(LD) $(_CPU_LDFLAGS) -shared $(OBJS-y) -Wl,-soname,$(LIB) -o $(LIB)
+O_TO_S = $(LD) $(_CPU_LDFLAGS) -L $(RTE_OUTPUT)/lib -Wl,-soname,$(LIB) \
+		 -shared $(OBJS-y) $(_LDLIBS) -o $(LIB)
 O_TO_S_STR = $(subst ','\'',$(O_TO_S)) #'# fix syntax highlight
 O_TO_S_DISP = $(if $(V),"$(O_TO_S_STR)","  LD $(@)")
 O_TO_S_DO = @set -e; \
-- 
1.9.3