Add LDFLAGS variable to Makefile so that extra linker flags can be sent via this variable.

Upstream-Status: Pending

Signed-off-by: Yi Zhao <yi.zhao@windriver.com>

--- a/Makefile
+++ b/Makefile
@@ -68,18 +68,17 @@ XGETTEXT = xgettext
 XGETTEXT_OPTS = --keyword=_ --keyword=P2_:1,1 --keyword=P3_:1,2 --language=C --add-comments
 MSGMERGE = msgmerge
 
-LDFLAGS =
 LDFLAGS_shared = $(LDFLAGS) --shared
 LDFLAGS_shared_LINUX = $(LDFLAGS) --shared
 LDFLAGS_shared_SUN = $(LDFLAGS) -G
 LDFLAGS_shared_HP = $(LDFLAGS) -b
 LDFLAGS_lib = $(LDFLAGS_shared)
-LDFLAGS_lib_LINUX = $(LDFLAGS_shared_LINUX) \
+LDFLAGS_lib_LINUX = $(LDFLAGS) $(LDFLAGS_shared_LINUX) \
 	-Wl,--soname,$(SHARED_LIB),--version-script,$(MAP_LIB)
 LDFLAGS_lib_SUN = $(LDFLAGS_shared_SUN)
 LDFLAGS_lib_HP = $(LDFLAGS_shared_HP)
 LDFLAGS_pam = $(LDFLAGS_shared)
-LDFLAGS_pam_LINUX = $(LDFLAGS_shared_LINUX) \
+LDFLAGS_pam_LINUX = $(LDFLAGS) $(LDFLAGS_shared_LINUX) \
 	-Wl,--version-script,$(MAP_PAM)
 LDFLAGS_pam_SUN = $(LDFLAGS_shared_SUN)
 LDFLAGS_pam_HP = $(LDFLAGS_shared_HP)