From: u-igbb@aetey.se
To: Rich Felker <dalias@libc.org>
Cc: musl@lists.openwall.com
Subject: Re: compiling musl on x86_64 linux with pcc
Date: Tue, 23 Sep 2014 21:05:25 +0200 [thread overview]
Message-ID: <20140923190525.GJ13475@example.net> (raw)
In-Reply-To: <20140825154617.GV12888@brightrain.aerifal.cx>
On Mon, Aug 25, 2014 at 11:46:17AM -0400, Rich Felker wrote:
> Note that some fixes are needed for
> pcc-libs:
>
> - You need to remove the broken csu files and replace them with
> symlinks to the musl files.
>
> - You need to add __attribute__((__visibility__("hidden"))) to all
> external functions in libpcc.
>
> - You need to add -fPIC to the CFLAGS for building libpcc or you get a
> broken libpcc (containing textrels) that can't be used for building
> libc.so and that's harmful for use with any other shared libs.
I followed these directions and musl with pcc play along very well for me
(on i386).
One strange thing I notice though, which is probably more pcc-related
than musl (even though this concerns a musl-based toolchain).
If I build a shared library with pcc without supplying -Wl,-Bsymbolic
(or -Wl,-Bsymbolic-functions as musl does) then a(ny) binary linked to that
library segfaults at start even if it does not actually need/use the
library. I noticed this with libpcap and wonder what is the reason. Adding
-Wl,-Bsymbolic makes everything work so the code is not exactly broken.
Wonder if you happen to guess a possible reason for such kind of trouble,
something that pcc gets wrong? This looks related to runtime linking
behaviour so possibly not fully offtopic here.
Rune
next prev parent reply other threads:[~2014-09-23 19:05 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-13 9:18 compiling musl on x86_64 linux with ppc u-igbb
2014-08-13 9:29 ` "pcc" of course ([musl] compiling musl on x86_64 linux with ppc) u-igbb
2014-08-13 9:49 ` compiling musl on x86_64 linux with ppc Szabolcs Nagy
2014-08-13 10:25 ` compiling musl on x86_64 linux with pcc u-igbb
2014-08-13 11:22 ` u-igbb
2014-08-13 11:53 ` summary: [musl] " u-igbb
2014-08-13 12:38 ` compiling musl on x86_64 linux with ppc Rich Felker
2014-08-13 12:56 ` u-igbb
2014-08-13 14:23 ` Rich Felker
2014-08-13 14:43 ` compiling musl on x86_64 linux with pcc u-igbb
2014-08-13 14:43 ` compiling musl on x86_64 linux with ppc Szabolcs Nagy
2014-08-14 7:10 ` compiling musl on x86_64 linux with pcc u-igbb
2014-08-14 14:20 ` Rich Felker
2014-08-14 14:38 ` u-igbb
2014-08-14 14:47 ` Rich Felker
2014-08-14 15:00 ` u-igbb
2014-08-15 10:49 ` va_list (was: [musl] compiling musl on x86_64 linux with pcc) u-igbb
2014-08-15 13:44 ` Rich Felker
2014-08-15 15:07 ` u-igbb
2014-08-15 15:56 ` Rich Felker
2014-08-15 17:12 ` u-igbb
2014-08-15 8:05 ` compiling musl on x86_64 linux with ppc u-igbb
2014-08-25 8:28 ` compiling musl on x86_64 linux with pcc u-igbb
2014-08-25 8:34 ` u-igbb
2014-08-25 15:46 ` Rich Felker
2014-08-26 19:34 ` u-igbb
2014-08-26 19:54 ` Rich Felker
2014-08-27 7:40 ` u-igbb
2014-08-27 7:54 ` Rich Felker
2014-08-27 8:52 ` variadic args (was: [musl] compiling musl on x86_64 linux with pcc) u-igbb
2014-08-27 16:34 ` Rich Felker
2014-08-28 8:13 ` u-igbb
2014-08-28 14:40 ` Rich Felker
2014-08-28 16:55 ` u-igbb
2014-08-27 14:38 ` compiling musl with pcc (i486-pc-linux-gnu) " u-igbb
2014-08-27 16:36 ` Rich Felker
2014-09-23 19:05 ` u-igbb [this message]
2014-09-23 19:31 ` compiling musl on x86_64 linux with pcc Rich Felker
2014-09-24 8:26 ` u-igbb
2014-08-13 23:39 ` compiling musl on x86_64 linux with ppc Isaac Dunham
2014-08-13 23:41 ` Rich Felker
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