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Re: GNU(step)Makefile & Windows problem

From: Nicola Pero
Subject: Re: GNU(step)Makefile & Windows problem
Date: Fri, 29 Apr 2005 12:27:41 +0100 (BST)

> I tryed to compile a simple project (on Windows) using GNUstep makefile 
> system with a simple makefile like that:
> -------------------------------------
> include $(GNUSTEP_MAKEFILES)/common.make
> TOOL_NAME  = NMReadWrite
> NMReadWrite_OBJC_FILES = main.m code.m TreeClasses/NMBranch.m 
> TreeClasses/NMTool.m
> include $(GNUSTEP_MAKEFILES)/tool.make
> -------------------------------------
> it failed on the compilation of TreeClass/NMBranch.m with an error like 
> that:
> -------------------------------------
> Making all for tool NMReadWrite...
>  Compiling file main.m ...
>  Compiling file code.m ...
>  Compiling file TreeClasses/NMBranch.m ...
> shared_obj/TreeClasses/NMBranch.d: No such file or directory
> make[1]: *** [shared_obj/TreeClasses/NMBranch.o] Error 1
> make: *** [NMReadWrite.all.tool.variables] Error 2
> -------------------------------------
> and indeed, when I looked into shared_obj directory, there is not even a 
> TreeClasses directory into it.
> Is it a bug or a feature of the GNUstep makefile system to not being able to 
> work with multiple directories for the source?

Well the idea is that you have a GNUmakefile in each directory where you
are compiling, so that if you want to just compile the files in the
directory (and sub-directories of it) you can type 'make' anywhere and
that works.

In your case, if you want to spread the tool ObjC files in the top-level
directory and a subdirectory, you can use a SUBPROJECT.

Put in the top level directory the following GNUmakefile:

include $(GNUSTEP_MAKEFILES)/common.make
TOOL_NAME  = NMReadWrite

NMReadWrite_OBJC_FILES = main.m code.m
NMReadWrite_SUBPROJECTS = TreeClasses
include $(GNUSTEP_MAKEFILES)/tool.make

and inside the TreeClasses directory, the following GNUmakefile:

include $(GNUSTEP_MAKEFILES)/common.make

TreeClasses_OBJC_FILES = NMBranch.m NMTool.m
include $(GNUSTEP_MAKEFILES)/subproject.make

That should work!  Then you can type 'make' inside TreeClasses if you just
want to compile that directory (useful for checking that the new code
compiles).  Obviously to build the tool anew you need to type 'make' in 
the top-level directory.

If you want to spread the code over multiple subdirs, just add more dirs
to the NMReadWrite_SUBPROJECTS list in the top-level GNUmakefile, and in
each put a subproject makefile like the one I showed you.

Thanks :-)

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