Date: Fri, 15 Jan 2016 10:11:39 -0800 From: Mark Millard <markmi@dsl-only.net> To: Roman Divacky <rdivacky@vlakno.cz> Cc: FreeBSD PowerPC ML <freebsd-ppc@freebsd.org>, FreeBSD Toolchain <freebsd-toolchain@freebsd.org> Subject: Re: clang 3.8.0 amd64 targeting powerpc64 accepts -mlong-calls (instead of -mlongcall) Message-ID: <2B8C0A2B-5979-449A-A09A-A078FF466BE2@dsl-only.net> In-Reply-To: <20160115170831.GA34394@vlakno.cz> References: <D19442CE-F5D4-4C3A-922B-82611A448624@dsl-only.net> <20160115170831.GA34394@vlakno.cz>
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On 2016-Jan-15, at 9:08 AM, Roman Divacky <rdivacky at vlakno.cz> wrote:
>=20
> On Thu, Jan 14, 2016 at 01:54:06AM -0800, Mark Millard wrote:
>> Context: projects/clang380-import based amd64 FreeBSD used to try =
building for powerpc64
>>=20
>> In csu/powerpc64/Makefile I replaced:
>>=20
>>> CFLAGS+=3D -I${.CURDIR}/../common \
>>> -I${.CURDIR}/../../libc/include \
>>> -mlongcall
>> . . .
>>> CC:=3D gcc
>>> COMPILER_TYPE:=3D gcc
>>=20
>> with
>>=20
>>> CFLAGS+=3D -I${.CURDIR}/../common \
>>> -I${.CURDIR}/../../libc/include \
>>> -mlong-calls
>> . . .
>>> #CC:=3D gcc
>>> #COMPILER_TYPE:=3D gcc
>>=20
>> and clang 3.8.0 targeting powerpc64 sailed through and past it =
without the slightest complaint about it. (It later reported that 'soft =
float is not supported for ppc64' from the -msoft-float that is always =
used for libstand.)
>=20
> That option only affects ARM. It doesn't have any effect on PPC64.
>=20
> Roman
Are you sure? My preliminary evidence:
Clang 3.8.0 (and 3.7.1) commonly reports on unused arguments:
> # clang -mlong-calls main.c
> clang: warning: argument unused during compilation: '-mlong-calls'
but no such message mentioning long-calls is in the script file recorded =
during the activity. The recorded command lines for the relevant crt* =
files have the -mlong-calls in them.
Other messages about unused -isystem and -L arguments were recorded in =
the overall activity.
=3D=3D=3D
Mark Millard
markmi at dsl-only.net
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