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Re: [Qemu-devel] [PATCH] CPPFLAGS+= in Makefile.target
From: |
Thiemo Seufer |
Subject: |
Re: [Qemu-devel] [PATCH] CPPFLAGS+= in Makefile.target |
Date: |
Mon, 28 Jan 2008 11:35:00 +0000 |
User-agent: |
Mutt/1.5.17+20080114 (2008-01-14) |
Ronan Keryell wrote:
> >>>>> On Fri, 25 Jan 2008 14:39:57 +0000, Paul Brook <address@hidden> said:
>
> >> Saying CPPFLAGS+= is much more convenient if for any reason the
> >> external build environment would like to pass unusual CPPFLAGS.
>
> Paul> No. This doesn't do what you thing it does. The most common way
> Paul> of overriding these variables is to pass them on the
> Paul> commandline, i.e. "make CPPFLAGS=-blah". This overrides all
> Paul> assignments to that variable including +=.
>
> By the way, it is possible to improve the GNU make weirdness :-) by
> playing with stuff like:
>
> override CFLAGS += -g
>
> Cf section 6.7 of the documentation.
IIRC the documentation warns against careless use of overrides.
> Hmmm... GNU make evolves more rapidly than my brain... :-)
It's only a decade old or so. :-)
Thiemo
- Re: [Qemu-devel] [PATCH] CPPFLAGS+= in Makefile.target, (continued)
- Re: [Qemu-devel] [PATCH] CPPFLAGS+= in Makefile.target, Ian Jackson, 2008/01/25
- Re: [Qemu-devel] [PATCH] CPPFLAGS+= in Makefile.target, Paul Brook, 2008/01/25
- Re: [Qemu-devel] [PATCH] CPPFLAGS+= in Makefile.target, Ian Jackson, 2008/01/25
- Re: [Qemu-devel] [PATCH] CPPFLAGS+= in Makefile.target, Paul Brook, 2008/01/25
- Re: [Qemu-devel] [PATCH] CPPFLAGS+= in Makefile.target, Ian Jackson, 2008/01/25
- Re: [Qemu-devel] [PATCH] CPPFLAGS+= in Makefile.target, Paul Brook, 2008/01/25
- Re: [Qemu-devel] [PATCH] CPPFLAGS+= in Makefile.target, Ian Jackson, 2008/01/25
- Re: [Qemu-devel] [PATCH] CPPFLAGS+= in Makefile.target, Paul Brook, 2008/01/25
- Re: [Qemu-devel] [PATCH] CPPFLAGS+= in Makefile.target, Ian Jackson, 2008/01/25
Re: [Qemu-devel] [PATCH] CPPFLAGS+= in Makefile.target, Ronan Keryell, 2008/01/28
- Re: [Qemu-devel] [PATCH] CPPFLAGS+= in Makefile.target,
Thiemo Seufer <=