Re: substitution vs expansion in Makefile.am

[Bob Friesenhahn]

On Tue, 4 Mar 2008, John Calcote wrote:

> Thanks Bob and Ralf.
>
> Here's one that's just a little more complex (the last one, I promise).
>
> I have this in my Makefile.am:
>
>   registrarTest_SOURCES = registrar.c\
>      @top_srcdir@/common/mySleep.c
>
>   registrarTest_CPPFLAGS = -DREGISTRAR_TEST\
>      -I$(top_srcdir)/common
>
> This question is somewhat related to the last one I asked. Where
> should I use @top_srcdir@, and where should I use $(top_srcdir)?

You should always use the Makefile form in Makefiles.  You should 
always use relative paths in the source tree (from the Makefile 
location) to refer to source files from your package (i.e. don't use 
@top_srcdir@).  If your package is built in some other directory, 
VPATH will be used to tell make where to look for the source files.

I see that Ralph just posted email.  Perhaps he will say something 
entirely different. :-)

Bob
======================================
Bob Friesenhahn
address@hidden, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/