From: Paul Brook <paul@codesourcery.com>
To: qemu-devel@nongnu.org
Cc: Ian Jackson <Ian.Jackson@eu.citrix.com>
Subject: Re: [Qemu-devel] [PATCH] CPPFLAGS+= in Makefile.target
Date: Fri, 25 Jan 2008 15:53:36 +0000 [thread overview]
Message-ID: <200801251553.37283.paul@codesourcery.com> (raw)
In-Reply-To: <18330.565.643731.225337@mariner.uk.xensource.com>
On Friday 25 January 2008, Ian Jackson wrote:
> Paul Brook writes ("Re: [Qemu-devel] [PATCH] CPPFLAGS+= in
Makefile.target"):
> > In that case you should always provide a definition in config-host.mak.
> > Under some circumstances make may inherit initial values from elsewhere.
>
> What circumstances ? CPPFLAGS+= overrides (discards) values in the
> environment as well as ones from the command line.
$ cat Makefile
FOO += World
all:
@echo "$(FOO)"
$ FOO=Hello make
Hello World
next prev parent reply other threads:[~2008-01-25 15:53 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-25 14:18 [Qemu-devel] [PATCH] CPPFLAGS+= in Makefile.target Ian Jackson
2008-01-25 14:39 ` Paul Brook
2008-01-25 14:44 ` Ian Jackson
2008-01-25 14:48 ` Ian Jackson
2008-01-25 15:36 ` Paul Brook
2008-01-25 15:37 ` Ian Jackson
2008-01-25 15:53 ` Paul Brook [this message]
2008-01-25 16:03 ` Ian Jackson
2008-01-25 16:03 ` Paul Brook
2008-01-25 16:12 ` Ian Jackson
2008-01-25 16:22 ` Paul Brook
2008-01-25 16:29 ` Ian Jackson
2008-01-28 9:09 ` Ronan Keryell
2008-01-28 11:35 ` Thiemo Seufer
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