Makefile: root - remove src/ if provided in the value of modules variable

Makefile

@@ -3,20 +3,32 @@
 # - forward all commands to the Makefile in the src/ subfolder
 #
 
+
 # path to the source code folder
 KSR_DIR ?= src/
 
 # default target for makefile
 .DEFAULT_GOAL := default
 
+
+# strip the src/ from the path to modules
+SMODPARAM=
+ifneq ($(modules),)
+ifneq (,$(findstring src/,$(modules)))
+smodules=$(subst src/,,$(modules))
+SMODPARAM=modules=$(smodules)
+endif
+endif
+
 # forward all named targets
 %:
-	$(MAKE) -C $(KSR_DIR) $@
+	$(MAKE) -C $(KSR_DIR) $@ $(SMODPARAM)
 
 # forward the default target
 default:
 	$(MAKE) -C $(KSR_DIR)
 
+# forward the install target
 .PHONY: install
 install:
-	$(MAKE) -C $(KSR_DIR) $@
+	$(MAKE) -C $(KSR_DIR) $@ $(SMODPARAM)