Bug#1050589: gcc-13: [x32] -fbuiltin-strchr miscompiles

[Thorsten Glaser <tg@mirbsd.de>]

Dixi quod…

>Package: gcc-13
>Version: 13.2.0-1

This is a regression against gcc-12 (= 12.3.0-8); if I install that
and export CC='diet -Os gcc-12' it works.

>./mksh -c 'x=q; x=${ echo a; typeset e=2; return 3; echo x$e;}; echo .$x.'

In case this is relevant: that codepath uses setjmp/longjmp quite a bit,
and builds for glibc, musl or klibc don’t trigger this, so it’s probably
a combination of several things. Using dietlibc/amd64 is also fine, and
dietlibc-wise, they are good as identical: differ only in start.S and
syscall numbers, and a few sections in header files.

bye,
//mirabilos
-- 
<ch> you introduced a merge commit        │<mika> % g rebase -i HEAD^^
<mika> sorry, no idea and rebasing just fscked │<mika> Segmentation
<ch> should have cloned into a clean repo      │  fault (core dumped)
<ch> if I rebase that now, it's really ugh     │<mika:#grml> wuahhhhhh