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Re: Makefile with .mod files

From: Brian Dessent <brian at dessent dot net>
To: Erik Schnetter <schnetter at cct dot lsu dot edu>
Cc: Ignacio Fernández Galván <jellby at yahoo dot com>, fortran at gcc dot gnu dot org
Date: Sat, 03 Nov 2007 13:32:42 -0700
Subject: Re: Makefile with .mod files
Organization: My own little world...
References: <741944.51760.qm@web33011.mail.mud.yahoo.com> <FEE5BFAE-6095-40E0-B0BA-060E760ADAF3@cct.lsu.edu>
Reply-to: fortran at gcc dot gnu dot org

Erik Schnetter wrote:

> Finally, if you use GNU make you can also write:
> 
> a.o a.mod: a.f90
>         gfortran -c $<

This is just shorthand for writing:

a.o: a.f90
	gfortran -c $<

a.mod: a.f90
	gfortran -c $<

...which can be problematic because in the second case it violates the
concept that a rule should always update $@.

Brian

References:
- Re: Makefile with .mod files
  - From: Ignacio Fernández Galván
- Re: Makefile with .mod files
  - From: Erik Schnetter

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