diff --git a/sp/src/devtools/makefile_base_posix.mak b/sp/src/devtools/makefile_base_posix.mak
index 559ee2be..6eda6890 100644
--- a/sp/src/devtools/makefile_base_posix.mak
+++ b/sp/src/devtools/makefile_base_posix.mak
@@ -6,10 +6,10 @@ MAKEFILE_LINK:=$(THISFILE).link
 
 -include $(MAKEFILE_LINK)
 
-$(MAKEFILE_LINK): $(shell which $(CC)) $(THISFILE)
-	if [ "$(shell printf "$(shell $(CC) -dumpversion)\n8" | sort -Vr | head -1)" = 8 ]; then \
-		$(COMPILE.cpp) -o gcc9+support.o gcc9+support.c ;\
+$(MAKEFILE_LINK): $(shell which $(CXX)) $(THISFILE)
+	@ if [ "$(shell printf "$(shell $(CXX) -dumpversion)\n8" | sort -Vr | head -1)" = 8 ]; then \
 		ln -sf $(MAKEFILE_BASE).default $@ ;\
 	else \
+		$(COMPILE.cpp) -o $(SRCROOT)/devtools/gcc9+support.o $(SRCROOT)/devtools/gcc9+support.cpp &&\
 		ln -sf $(MAKEFILE_BASE).gcc8 $@ ;\
 	fi