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Date:      Tue, 17 Apr 2012 11:18:29 +0200
From:      Dimitry Andric <dim@FreeBSD.org>
To:        Chris <behrnetworks@gmail.com>, Chris Rees <crees@freebsd.org>,  Current FreeBSD <freebsd-current@freebsd.org>, "O. Hartmann" <ohartman@zedat.fu-berlin.de>
Cc:        Doug Barton <dougb@FreeBSD.org>
Subject:   Re: "/sys/conf/kmod.mk", line 111: Malformed conditional (${MK_CLANG_IS_CC}
Message-ID:  <4F8D3565.2020803@FreeBSD.org>
In-Reply-To: <20120416230857.GA26957@mech-cluster241.men.bris.ac.uk>
References:  <4F520523.90406@zedat.fu-berlin.de> <CADLo838ZKXXS4mVcjG3cnRp=aQdx5Cpas6DLiSsGQO1acqHnwQ@mail.gmail.com> <4F52286E.4030608@FreeBSD.org> <4F523C1A.4060008@zedat.fu-berlin.de> <CAFYLaXPveMM0RCoHSLpG8i2-i6cStWSPrf4FkzZu63Eg--UE%2Bw@mail.gmail.com> <4F8BBFF3.50205@FreeBSD.org> <CAFYLaXNfYD0E6UbXHO9gBYY0x3eNACQDstubaPZSL_6x4tMzSw@mail.gmail.com> <20120416230857.GA26957@mech-cluster241.men.bris.ac.uk>

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On 2012-04-17 01:08, Anton Shterenlikht wrote:
...
> Just to say that I stumbled upon this issue as well:
>
> http://lists.freebsd.org/pipermail/freebsd-ports/2012-April/074409.html
>
> Subject: net/bwi-firmware-kmod "/sys/conf/kmod.mk", line 111: Malformed conditional (${MK_CLANG_IS_CC} == "no"&&  ${CC:T:Mclang} != "clang")

The root cause is still that your kernel sources (in /sys) do not match
your installed world.  The kernel module build process uses bsd.own.mk
from /usr/share/mk, which should define MK_CLANG_IS_CC.  If it doesn't,
but your kernel source references it, there is a mismatch.

In some cases, you could fix it by setting MAKESYSPATH to the share/mk
dir under your source tree.  There is still no guarantee your module
will build or load correctly.

As Doug Barton said in reply to r232473: "Building ports where the
sources and the installed kernel differ is not a supported
configuration. The fact that it happens to work most of the time is a
bonus."

That said, i think it may be time to bow to the pressure, and just put a
fixup for this issue in kmod.mk, and the other .mk files, like I
initially did in r232473, but with a BIG FAT WARNING printed, so you at
least know you are attempting to shoot your extremities. :)



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