Date: Tue, 10 Feb 2015 19:50:59 -0700 From: Warner Losh <imp@bsdimp.com> To: Peter Grehan <grehan@FreeBSD.org> Cc: freebsd-toolchain@freebsd.org Subject: Re: Resurrecting clang external toolchain support in Makefile.inc Message-ID: <D5BF8A1B-FA6F-4A0D-A109-D23867FA9F17@bsdimp.com> In-Reply-To: <54DABF3A.8060003@freebsd.org> References: <54DABF3A.8060003@freebsd.org>
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> On Feb 10, 2015, at 7:32 PM, Peter Grehan <grehan@FreeBSD.org> wrote:
>=20
> Hi toolchain folk,
>=20
> I've recently tried using the base system clang as an external =
toolchain i.e.
>=20
> make CROSS_COMPILER_PREFIX=3D/usr/bin/ buildworld
>=20
> .. and found that this no longer works after r273755 which split =
XFLAGS into XC/XCXXFLAGS. This appears to be because the XFLAGS =
definitions that define --sysroot and -B options aren't being passed =
through to clang, resulting in using header files from the host system.
>=20
> My quick hack was
>=20
> --- Makefile.inc1 (revision 278542)
> +++ Makefile.inc1 (working copy)
> @@ -374,6 +374,8 @@
> TARGET_ABI?=3D unknown
> TARGET_TRIPLE?=3D =
${TARGET_ARCH:C/amd64/x86_64/}-${TARGET_ABI}-freebsd11.0
> XCFLAGS+=3D -target ${TARGET_TRIPLE}
> +XCFLAGS+=3D ${XFLAGS}
> +XCXXFLAGS+=3D ${XFLAGS}
> .endif
> .endif
>=20
> However, this doesn't look to be the right way to fix this.
>=20
> Any opinions on a proper fix ?
I have a similar =E2=80=9Cfix=E2=80=9D in my tree as well, but hadn=E2=80=99=
t pushed it because I wasn=E2=80=99t quite sure the right way either.
Warner=
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