Hello, I have the following problem which boils down to directory creation, in case anyone can help me with it.
I have a project makefile which generates and includes makefiles for all of the project's modules. By generation, I really mean they are processed with m4. Before anyone says anything, yes, I am aware that I could be using GNU Autotools to solve my problem but I would still like to figure out what I am doing wrong. Here is the directory structure: project - The project directory project/makefiles - Here is where the makefiles are to be generated project/src - Here is where the modules go project/src/foo - Example module project/src/bar - Example module There are four files in this dummy project: project/makefile - The main makefile which includes everything from the makefiles directory project/src/project.m4 - Generate makefiles/project.mk to select modules project/src/foo/foo.m4 - Generate makefiles/foo/foo.mk to build component foo project/src/bar/bar.m4 - Generate makefiles/bar/bar.mk to build component bar Here is what I expect to be generated: project/makefiles/project.mk project/makefiles/foo/foo.mk project/makefiles/bar/bar.mk Here is project/makefile: SRC_DIR = src MAKE_DIR = makefiles $(MAKE_DIR)/%.mk: $(SRC_DIR)/%.m4 | $(MAKE_DIR)/$(MODULE); m4 $< $@ $(MAKE_DIR)/$(MODULE): ; mkdir -p $@ include $(MAKE_DIR)/project.mk I know MODULE isn't defined at the point of the inclusion; that is because I want the macro to expand to the empty string such that the "makefiles" subdirectory can be created. This macro will be relevant later and should expand on usage. Since this is just a dummy test project, there isn't actually any m4 processing being done so project.m4 and project.mk will end up looking identical. Here are the contents: MODULE = foo include $(MAKE_DIR)/$(MODULE)/foo.mk MODULE = bar include $(MAKE_DIR)/$(MODULE)/bar.mk Nothing else happens because foo.m4 and bar.m4 are empty. There is no target; I only expect this to generate the makefiles mentioned above for me (after all, make can't know that there is no target until it's done generating and including all the makefiles). Here's what's wrong: $ make makefile:7: makefiles/project.mk: No such file or directory mkdir -p makefiles/ m4 src/project.m4 >makefiles/project.mk makefiles/project.mk:2: makefiles/foo/foo.mk: No such file or directory makefiles/project.mk:5: makefiles/bar/bar.mk: No such file or directory m4 src/bar/bar.m4 >makefiles/bar/bar.mk /bin/sh: 1: cannot create makefiles/bar/bar/.mk: Directory nonexistent makefile:4: recipe for target 'makefiles/bar/bar.mk' failed make: *** [makefiles/bar/bar.mk] Error 2 The "No such file or directory" lines don't bother me. They are there because I didn't silence the include directives; make should attempt to generate what's being included and restart. As you can see, generating project.mk causes the makefiles subdirectory to be created. Why doesn't this happen in the case of foo.mk and bar.mk as well? _______________________________________________ Help-make mailing list Help-make@gnu.org https://lists.gnu.org/mailman/listinfo/help-make
