Add support to link an external lib with ARM TF

This patch defines the variable `LDLIBS` which allows external
libraries to be specified to 'ld' to enable it to link the
libraries.

Change-Id: I02a490eca1074063d00153ccb0ee974ef8859a0e
Signed-off-by: Soby Mathew <soby.mathew@arm.com>

diff --git a/make_helpers/build_macros.mk b/make_helpers/build_macros.mk
index aee045dee8d2bbee396202c83e6c178c75048999..e59a64b42bdcd0ecfe2639ddfae632a475872d23 100644 (file)
--- a/make_helpers/build_macros.mk
+++ b/make_helpers/build_macros.mk
@@ -314,7 +314,7 @@ else
                $$(CC) $$(TF_CFLAGS) $$(CFLAGS) -xc -c - -o $(BUILD_DIR)/build_message.o
 endif
        $$(Q)$$(LD) -o $$@ $$(TF_LDFLAGS) $$(LDFLAGS) -Map=$(MAPFILE) \
-               --script $(LINKERFILE) $(BUILD_DIR)/build_message.o $(OBJS)
+               --script $(LINKERFILE) $(BUILD_DIR)/build_message.o $(OBJS) $(LDLIBS)
 
 $(DUMP): $(ELF)
        @echo "  OD      $$@"