tests: add OMIT logic to remove compilation flag.

Add OMIT logic to remove compilation flags when compiling libraries,
binaries( both host and target)

Signed-off-by: Filippo Arcidiacono <filippo.arcidiacono@st.com>
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

test/Test.mak

@@ -99,12 +99,14 @@ $(MAKE_SRCS): Makefile $(TESTDIR)Makefile $(TESTDIR)Rules.mak $(TESTDIR)Test.mak
 
 $(U_TARGETS): $(U_TARGET_SRCS) $(MAKE_SRCS)
 	$(showlink)
-	$(Q)$(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(CFLAGS_$(notdir $(CURDIR))) $(CFLAGS_$@) -c $@.c -o $@.o
+	$(Q)$(CC) $(filter-out $(CFLAGS-OMIT-$@),$(CFLAGS)) $(EXTRA_CFLAGS) $(CFLAGS_$(notdir $(CURDIR))) $(CFLAGS_$@) -c $@.c -o $@.o
 	$(Q)$(CC) $(LDFLAGS) $@.o -o $@ $(EXTRA_LDFLAGS) $(LDFLAGS_$@)
 
 $(G_TARGETS): $(U_TARGET_SRCS) $(MAKE_SRCS)
 	$(showlink)
-	$(Q)$(HOSTCC) $(HOST_CFLAGS) $(CFLAGS_$(notdir $(CURDIR))) $(CFLAGS_$(patsubst %_glibc,%,$@)) -c $(patsubst %_glibc,%,$@).c -o $@.o
+	$(Q)$(HOSTCC) $(filter-out $(HOST_CFLAGS-OMIT-$(patsubst %_glibc,%,$@)),$(HOST_CFLAGS)) \
+	$(CFLAGS_$(notdir $(CURDIR))) $(CFLAGS_$(patsubst %_glibc,%,$@)) \
+	-c $(patsubst %_glibc,%,$@).c -o $@.o
 	$(Q)$(HOSTCC) $(HOST_LDFLAGS) $@.o -o $@ $(EXTRA_LDFLAGS) $(LDFLAGS_$(patsubst %_glibc,%,$@))
 
 
@@ -117,9 +119,11 @@ shell_%:
 %.so: %.c
 	$(showlink)
 	$(Q)$(CC) \
-		$(CFLAGS) $(EXTRA_CFLAGS) $(CFLAGS_$(patsubst %_glibc,%,$@)) \
+		$(filter-out $(CFLAGS-OMIT-$<),$(CFLAGS)) $(EXTRA_CFLAGS) \
+		$(CFLAGS_$(patsubst %_glibc,%,$@)) \
 		-fPIC -shared $< -o $@ -Wl,-soname,$@ \
-		$(LDFLAGS) $(EXTRA_LIBS) $(LDFLAGS_$(patsubst %_glibc,%,$@))
+		$(filter-out $(LDFLAGS-OMIT-$<),$(LDFLAGS)) $(EXTRA_LIBS) \
+		$(LDFLAGS_$(patsubst %_glibc,%,$@))
 
 clean:
 	$(showclean)