include $(GNUSTEP_MAKEFILES)/common.make TOOL_NAME = HelloWorld HelloWorld_OBJC_FILES = Subdirectory/HelloWorld.m include $(GNUSTEP_MAKEFILES)/tool.make
This works if you use gnustep-make 2.4.0 (or later); but wouldn't work with previous versions of gnustep-make, because HelloWorld.m is in a subdirectory. So, people who wanted to organize their source files in different subdirectories had to use ``subprojects''. You created a GNUmakefile in each of the subdirectories (which would build using subproject.make), then specifies that the tool had some subprojects. So, the tool's GNUmakefile would have been -
include $(GNUSTEP_MAKEFILES)/common.make TOOL_NAME = HelloWorld HelloWorld_SUBPROJECTS = Subdirectory include $(GNUSTEP_MAKEFILES)/tool.make
and in the subdirectory you'd have had a GNUmakefile such as the following one -
include $(GNUSTEP_MAKEFILES)/common.make SUBPROJECT_NAME = Subdirectory Subdirectory_OBJC_FILES = HelloWorld.m include $(GNUSTEP_MAKEFILES)/subproject.make
You'll appreciate how easier it is to specify source files in subdirectories directly in the tool's GNUmakefile (as allowed by gnustep-make 2.4.0), without having to have an additional GNUmakefile in each subdirectory.