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Re: vpath builds and include paths

From: Bob Friesenhahn
Subject: Re: vpath builds and include paths
Date: Mon, 22 Dec 2003 09:04:35 -0600 (CST)

On Mon, 22 Dec 2003 address@hidden wrote:

> However, if I want to build in a separate build tree (relying on
> VPATH), then I try the following:
> mkdir /build
> cd /build
> /test/configure
> make
> This attempts to build in this new /build directory, but during
> compilation it cannot locate the header file, myproj.hpp, and the rest
> of the build fails.  What do I need to do in order to tell automake
> where this header is?  I've already tried using the absolute path
> variables in the
> INCLUDE = -I$(abs_top_srcdir)/project2/sublevel/inc

Note that abs_top_srcdir calculation was broken in Autoconf 2.58.  It
is fixed in 2.59.

Rather than using INCLUDE you should use AM_CPPFLAGS.  For example

AM_CPPFLAGS = -I$(top_srcdir)/project2/sublevel/inc

Bob Friesenhahn

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