Re: Build error on HEAD

On Mon, 2002-11-18 at 00:59, Guido Serassio wrote:

> OK, but please, someone can explain this to me ? What is VPATH ?

In addition to Henriks description, let me add why it's useful:

Say I'm working on the nt port, but I want to make sure I don't break
cygwin, and that the service and non service builds both work well.

So, I can do this many ways:
* reconfigure after every change and rebuild the entire things (ouch).
* Have multiple trees and manually apply the same patch to each (ouch).
* have one source tree, and many build trees all building from the same
source with different options.

ie:
~/source/squid/nt3 <- my nt source tree
~/build/squid/nt3service <- my nt service build tree
~/build/squid/nt3 <- my nt nonservice build tree
~/build/squid/nt3cygwin <- my nt cygwin build tree.

Thus you can see that it's important that autoconf.h is included from
the build tree, not the source tree, to allow this to happen.

Rob