Re: [Mingw-users] Problem with mingw32-make - "multiple target patterns"

[Jim C. <ji...@ms...>]

Thanks so much for your response.  As you may have guessed I'm new to this,
but am trying to set everything up so I can begin learning some C and C++.

I changed the variable name to INCLUDES (in case it conflicted with
something I didn't know about) and removed the -I.  Same problem.  I also
tried the following formats for assigning the variable:

INCLUDES = -I"c:\GTK\include\gtk-2.0"
INCLUDES = -I'c:\GTK\include\gtk-2.0'
INCLUDES = "c:\GTK\include\gtk-2.0"
INCLUDES = c:\GTK\include\gtk-2.0

which resulted in the same error.  If I change the path to exclude the c:
then I get the "fatal error: gtk/gtk.h: No such file or directory"


On Thu, Mar 7, 2013 at 4:41 PM, Eli Zaretskii <el...@gn...> wrote:

> > Date: Thu, 7 Mar 2013 16:16:42 -0500
> > From: Jim Crews <ji...@ms...>
> >
> > I'm a first time user of this list so I hope I'm addressing it to the
> > proper group.
>
> Actually, mak...@gn... is a better place.
>
> > I am trying to use the mingw32-make command on Windows 7, but receive an
> > error every time stating "*** multiple target patterns".  I have no idea
> > what this means and have spent many hours online trying to find a
> solution.
> >
> > My guess from everything I've read is that it has to do with the first
> line
> > in my makefile:
> >
> > INC = -Ic:\GTK\include\gtk-2.0
> >
> > MAIN = graphictest
> > OBJS = graphictest.o
> >
> > CC=gcc
> > CFLAGS = -Wall -g
> >
> > $(MAIN): $(MAIN) $(OBJS) $(INC)
>
> This Makefile uses $(INC) in a way that doesn't make sense to me.  The
> value of INC is a compiler switch, but then why do you use it as a
> prerequisite for $(MAIN) ?
>
> See, what happens here is that you are stomping on a fragile feature
> of Make on Windows, whereby it understands that a colon ':' in certain
> contexts does not signal a target or a list of dependencies or a
> target pattern.  But when you precede "c:" with -I, you break the
> logic which figures out that c: is a drive spec.  So you get a
> nonsensical error message from Make.
>
> But since your usage of $(INC) doesn't make sense anyway, I don't
> think there's any bug in Make revealed by this.  Simply don't do that;
> if you remove -I from the value of INC, everything is dandy.
>
>
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