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Re: Make doesn't understand wich files have been modified

From: Michael Ludwig
Subject: Re: Make doesn't understand wich files have been modified
Date: Fri, 25 Nov 2011 16:15:23 +0100
User-agent: Mutt/1.5.20 (2009-12-10)

address@hidden schrieb am 25.11.2011 um 10:03 (+0100):
> When i modify an header file (.h) and then i compile the project, not
> all sorce (.c) files that include the modified header are re-compiled
> by make. I've no problems when i modify only the source .c files.

Do you specify the dependency of source files on header files?

| Since our source files now include header files, these new
| dependencies should be recorded in our makefile so that when
| a header file is modified, the corresponding object file will
| be updated.
| count_words: count_words.o counter.o lexer.o -lfl
|     gcc $^ -o $@

I'm a Make newbie, so I don't know - but there might be a way to have
make (or rather some other program invoked by make) scan C source files
to create Makefile snippets (includes) that translate the dependencies
of source files on header files into Makefile rules.

Michael Ludwig

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