Date: Fri, 21 Sep 2018 16:37:08 -0400 From: Ed Maste <emaste@freebsd.org> To: Mark Johnston <markj@freebsd.org> Cc: Mark Millard <marklmi@yahoo.com>, FreeBSD Toolchain <freebsd-toolchain@freebsd.org>, FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: building head -r338675 with devel/amd64-gcc: /usr/local/x86_64-unknown-freebsd12.0/bin/ld: warning: -z ifunc-noplt ignored Message-ID: <CAPyFy2DTw-LGXUVCP2W0MOW0bXWe2An18Y-Uy-U6X40UJCiy6w@mail.gmail.com> In-Reply-To: <20180921193139.GB5120@raichu> References: <2E7136DD-9C25-44C1-8C9A-310C2D1D7189@yahoo.com> <CAPyFy2BHUocGh-H8xfmdQXTTX_Qvoi50xKzoTGco8Cn9FfGcyQ@mail.gmail.com> <20180921193139.GB5120@raichu>
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On 21 September 2018 at 15:31, Mark Johnston <markj@freebsd.org> wrote:
>
> Perhaps the following? It's not quite right since it'll still use
> -zifunc-noplt with an external LLVM toolchain, but I can't seem to
> figure out how to define a linker feature for only non-cross toolchains.
> In any case, we're going to upstream the option soon.
I wouldn't worry too much about out-of-tree since it will be upstream
soon as you say, otherwise looks good.
> +.if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
> +.if defined(LINKER_FEATURES) && ${LINKER_FEATURES:Mifunc} == ""
> .error amd64/i386 kernel requires linker ifunc support
> .endif
> +.if defined(LINKER_FEATURES) && ${LINKER_FEATURES:Mifunc-noplt} != ""
Maybe roll && defined(LINKER_FEATURES) into the outer .if?
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