From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.org/gmane.linux.lib.musl.general/2769 Path: news.gmane.org!not-for-mail From: Jens Gustedt Newsgroups: gmane.linux.lib.musl.general Subject: Re: [PATCH 2/3] Have different definitions of __pthread_tsd_main agree in size Date: Mon, 11 Feb 2013 08:40:20 +0100 Message-ID: <1360568420.23424.521.camel@eris.loria.fr> References: <1360535367.23424.466.camel@eris.loria.fr> <20130211003158.GP20323@brightrain.aerifal.cx> Reply-To: musl@lists.openwall.com NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/signed; micalg="pgp-sha1"; protocol="application/pgp-signature"; boundary="=-EjPbC9sfSrW1/6hxnLKi" X-Trace: ger.gmane.org 1360568431 18946 80.91.229.3 (11 Feb 2013 07:40:31 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 11 Feb 2013 07:40:31 +0000 (UTC) To: musl@lists.openwall.com Original-X-From: musl-return-2770-gllmg-musl=m.gmane.org@lists.openwall.com Mon Feb 11 08:40:53 2013 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Cj15cu23XZI4/826Px/xqB37z547sPH374oOvnKTsOb+1zuCoImZARM8ZiLlKkXcWOcoFRJ+Do/CwFO4e2DEe+9Ti+ZXA8ny/cU+X4bMKRZxZIVEiqXI6/+NKuUzPHb7z40ovnX3zx+Ctuq38HyuqWG7Tu+A0AAAAASUVORK5CYII= X-Mailer: Evolution 3.2.3-0ubuntu6 Xref: news.gmane.org gmane.linux.lib.musl.general:2769 Archived-At: --=-EjPbC9sfSrW1/6hxnLKi Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Am Sonntag, den 10.02.2013, 19:31 -0500 schrieb Rich Felker: > Nope, that defeats the whole purpose, which is to avoid wasting space > when it's not needed. This warning is bogus. There's no reason a weak > symbol can't have different size than a strong one that optionally > replaces it. Hm, about wasting space I am not very convinced, but maybe I didn't understand well enough why you need all these aliases after all, and why you can't refer to the real symbol directly. In any case, this is perhaps better done with the tool chain. I have good experience by having -fdata-sections -ffunction-sections for the compiler options and then -Wl, --gc-sections for the link. In the case of musl, this removes exactly all the dummy sections :) plus two others (pad and sccp), see below. Also I observed that the .so when compiled with -O3 and -flto is smaller than with the default build options. Jens /usr/bin/ld: Removing unused section '.rodata.dummy_file.17696.2847' in fil= e '/tmp/ccKGiYdU.ltrans0.ltrans.o' /usr/bin/ld: Removing unused section '.rodata.dummy.18033.2845' in file '/t= mp/ccKGiYdU.ltrans0.ltrans.o' /usr/bin/ld: Removing unused section '.rodata.dummy.18516.2843' in file '/t= mp/ccKGiYdU.ltrans0.ltrans.o' /usr/bin/ld: Removing unused section '.rodata.dummy_file.24416.2840' in fil= e '/tmp/ccKGiYdU.ltrans0.ltrans.o' /usr/bin/ld: Removing unused section '.rodata.dummy.24420.2836' in file '/t= mp/ccKGiYdU.ltrans0.ltrans.o' /usr/bin/ld: Removing unused section '.bss.dummy.25545.2834' in file '/tmp/= ccKGiYdU.ltrans0.ltrans.o' /usr/bin/ld: Removing unused section '.text.pad.21403' in file '/tmp/ccKGiY= dU.ltrans2.ltrans.o' /usr/bin/ld: Removing unused section '.text.dummy.16099.2724' in file '/tmp= /ccKGiYdU.ltrans8.ltrans.o' /usr/bin/ld: Removing unused section '.text.dummy_0.14753.2904' in file '/t= mp/ccKGiYdU.ltrans8.ltrans.o' /usr/bin/ld: Removing unused section '.text.dummy_0.14278.2989' in file '/t= mp/ccKGiYdU.ltrans8.ltrans.o' /usr/bin/ld: Removing unused section '.text.dummy.14134.2991' in file '/tmp= /ccKGiYdU.ltrans8.ltrans.o' /usr/bin/ld: Removing unused section '.text.dummy0.11727.2430' in file '/tm= p/ccKGiYdU.ltrans13.ltrans.o' /usr/bin/ld: Removing unused section '.text.dummy1.11721.2433' in file '/tm= p/ccKGiYdU.ltrans13.ltrans.o' /usr/bin/ld: Removing unused section '.text.dummy0.11661.2464' in file '/tm= p/ccKGiYdU.ltrans13.ltrans.o' /usr/bin/ld: Removing unused section '.text.dummy1.11656.2467' in file '/tm= p/ccKGiYdU.ltrans13.ltrans.o' /usr/bin/ld: Removing unused section '.text.dummy_0.20439.2558' in file '/t= mp/ccKGiYdU.ltrans17.ltrans.o' /usr/bin/ld: Removing unused section '.text.dummy_0.24290.2666' in file '/t= mp/ccKGiYdU.ltrans20.ltrans.o' /usr/bin/ld: Removing unused section '.text.dummy.23638.2864' in file '/tmp= /ccKGiYdU.ltrans20.ltrans.o' /usr/bin/ld: Removing unused section '.text.dummy.23456.2867' in file '/tmp= /ccKGiYdU.ltrans20.ltrans.o' /usr/bin/ld: Removing unused section '.text.sccp.23444.2870' in file '/tmp/= ccKGiYdU.ltrans20.ltrans.o' /usr/bin/ld: Removing unused section '.text.dummy_1.26947.2522' in file '/t= mp/ccKGiYdU.ltrans22.ltrans.o' /usr/bin/ld: Removing unused section '.text.dummy.5449.2666' in file '/tmp/= ccKGiYdU.ltrans28.ltrans.o' /usr/bin/ld: Removing unused section '.text.dummy.5419.2669' in file '/tmp/= ccKGiYdU.ltrans28.ltrans.o' /usr/bin/ld: Removing unused section '.text.dummy.5020.2796' in file '/tmp/= ccKGiYdU.ltrans28.ltrans.o' /usr/bin/ld: Removing unused section '.text.dummy.2522.3034' in file '/tmp/= ccKGiYdU.ltrans28.ltrans.o' --=20 :: INRIA Nancy Grand Est :: http://www.loria.fr/~gustedt/ :: :: AlGorille ::::::::::::::: office Nancy : +33 383593090 :: :: ICube :::::::::::::: office Strasbourg : +33 368854536 :: :: ::::::::::::::::::::::::::: gsm France : +33 651400183 :: :: :::::::::::::::::::: gsm international : +49 15737185122 :: --=-EjPbC9sfSrW1/6hxnLKi Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iEYEABECAAYFAlEYoGQACgkQD9PoadrVN+Jq0wCfRFn4xANf2kApIxCbnU1t2KbW ZFoAoJym5BtV97T/+V1O4CUWETFwEobQ =meyE -----END PGP SIGNATURE----- --=-EjPbC9sfSrW1/6hxnLKi--