Date: Fri, 24 Sep 2010 08:36:50 -0400 From: John Baldwin <jhb@freebsd.org> To: freebsd-current@freebsd.org Cc: mdf@freebsd.org Subject: Re: sys/conf/files aicasm Message-ID: <201009240836.50995.jhb@freebsd.org> In-Reply-To: <AANLkTinHcGOKaxKE4k0NFpHA5acPHWmhfHiWtFxor42U@mail.gmail.com> References: <AANLkTinHcGOKaxKE4k0NFpHA5acPHWmhfHiWtFxor42U@mail.gmail.com>
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On Thursday, September 23, 2010 5:41:35 pm mdf@freebsd.org wrote:
> I can't say I understand much about the syntax of the top part of
> sys/conf/files, but this line:
>
>
> aicasm optional ahc | ahd \
> dependency "$S/dev/aic7xxx/aicasm/*.[chyl]" \
> compile-with "CC='${CC}' ${MAKE} -f $S/dev/aic7xxx/aicasm/Makefile
> MAKESRCPATH=$S/dev/aic7xxx/aicasm" \
> no-obj no-implicit-rule \
> clean "aicasm* y.tab.h"
>
> looks to me like aicasm should only be built if I have device ahc or
> device ahd in my kernel configuration file.
>
> But even if I make a config file without those devices (e.g. by doing
> include GENERIC then nodevices ahc, ahd) the file is still built. Am
> I missing something about how these lines in sys/conf/files work?
I think make buildkernel may build this explicitly rather than depending on
the Makefile to do it.
> As a side question, why does the Makefile for dev/aic7xxx/aicasm have
> -I/usr/include in CFLAGS instead of using some marcos to get to the
> source tree I'm actually building from?
Because it needs to be built on the host and run on the host. For a cross-
build the source tree you are building from might very well be for a different
architecture and can't be used to build a binary that will run on the host.
--
John Baldwin
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