Date: Thu, 20 Aug 2020 21:53:02 +0200 From: Dimitry Andric <dim@FreeBSD.org> To: Gleb Popov <arrowd@freebsd.org> Cc: toolchain@freebsd.org Subject: Re: Undefined reference to __bswapsi2/__bswapdi2 Message-ID: <4616D1DE-55B4-43AA-B8D9-A3C0513C9BC1@FreeBSD.org> In-Reply-To: <CALH631==P4bA27wV1V1U8gUPff4RrmFd=ReRV8OeiZHHsppA5w@mail.gmail.com> References: <CALH631mXOLvLrrMcB3rfqQT5c%2BEEMRBnGgEBSEooHJYELOE9Fw@mail.gmail.com> <CALH631==P4bA27wV1V1U8gUPff4RrmFd=ReRV8OeiZHHsppA5w@mail.gmail.com>
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--Apple-Mail=_63982B89-1BCA-4B48-9617-A82EB06C6569 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii On 20 Aug 2020, at 19:52, Gleb Popov <arrowd@freebsd.org> wrote: >=20 > On Wed, Aug 19, 2020 at 10:15 PM Gleb Popov <arrowd@freebsd.org> = wrote: >=20 >> Hi toolchain@ >>=20 >> I'm building the latest GHC on 12.1-RELEASE i386 and having almost = the >> same problem as with atomic functions. This time the error is >>=20 >> d: error: undefined symbol: __bswapsi2 >>>>> referenced by TTY.c >>>>> RTS.thr_p_o:(rtsSyms) in archive >> = /wrkdirs/usr/ports/lang/ghc/work/ghc-8.10.2/rts/dist/build/libHSrts_thr_p.= a >>=20 >> ld: error: undefined symbol: __bswapdi2 >>>>> referenced by TTY.c >>>>> RTS.thr_p_o:(rtsSyms) in archive >> = /wrkdirs/usr/ports/lang/ghc/work/ghc-8.10.2/rts/dist/build/libHSrts_thr_p.= a >>=20 >> What's wrong with that? These functions seem to be present in our >> compiler-rt. >>=20 >=20 > Reading /usr/src/lib/libcompiler_rt/Makefile.inc, it seems that we = don't > compile these functions. What's the reason for this? I'm not aware of any particular reason, except that nobody seems to have run into this omission before. It looks like on x86, compilers usually just emit bswap instructions instead of libcalls for these situations. Apparently we have historically only added bswapdi and bswapsi for arm, mips and riscv. -Dimitry --Apple-Mail=_63982B89-1BCA-4B48-9617-A82EB06C6569 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.2 iF0EARECAB0WIQR6tGLSzjX8bUI5T82wXqMKLiCWowUCXz7UngAKCRCwXqMKLiCW owIqAKDUepZKmj4GIXLSb0uvGlEbUqL+EQCgulf0I6BmTbcrAWydumj/23oS56o= =qlMy -----END PGP SIGNATURE----- --Apple-Mail=_63982B89-1BCA-4B48-9617-A82EB06C6569--
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