MIME-Version: 1.0
From: Vittorio Mori <vittorio.mori@gmail.com>
Date: Fri, 19 Jul 2019 09:40:13 +0200
Message-ID: 
 <CAD4qdYDSYcp_mzBJXM6PFQsGA9xkR8_s+aWpgRTGkXwoPcx2-Q@mail.gmail.com>
Subject: ZPAQ compiles but segfaults at pthread() with musl
To: alpine-user@lists.alpinelinux.org
Content-Type: text/plain; charset="UTF-8"

Hello everyone.

I have an issue compiling the ZPAQ compressor/archive utility from Matt Mahoney.

It seems there are problems with pthread() function: the program
compiles correctly, but segfaults at some point.

This is what I get from GDB:

 Starting program: /root/zpaq a test /
zpaq v7.15 journaling archiver, compiled May 3 2019
test.zpaq: 0 versions, 0 files, 0 fragments, 0.000000 MB
Updating test.zpaq at offset 0 + 0
Adding 1326.112348 MB in 42966 files -method 14 -threads 1 at
2019-05-03 12:12:34.
[New LWP 2317]
[New LWP 2318]
1.27% 0:00:27 [1..236] 16754818 -method 14,97,0

Thread 2 "zpaq" received signal SIGSEGV, Segmentation fault.
[Switching to LWP 2317]
0x00007ffff7fac5c0 in libzpaq::Predictor::Predictor(libzpaq::ZPAQL&) ()
(gdb)


(gdb) backtrace
#0 0x00007ffff7fac5c0 in libzpaq::Predictor::Predictor(libzpaq::ZPAQL&) ()
#1 0x00007ffff7fc7122 in
libzpaq::compressBlock(libzpaq::StringBuffer*, libzpaq::Writer*, char
const*, char const*, char const*, bool) ()
#2 0x00007ffff7f83284 in compressThread(void*) ()
#3 0x00007ffff7fdd2c6 in start (p=<optimized out>) at
src/thread/pthread_create.c:147
#4 0x00007ffff7fddd11 in __clone () at src/thread/x86_64/clone.s:21
Backtrace stopped: frame did not save the PC
(gdb)

(gdb) frame 3
#3 0x00007ffff7fdd2c6 in start (p=<optimized out>) at
src/thread/pthread_create.c:147
147 src/thread/pthread_create.c: No such file or directory.


I wonder if there is a trivial solution to this problem.

I've found a (kinda ugly, but useful)  workaround for this installing
the glibc binaries from sgerrand repository on github
and using a binary compiled from another distro (with glibc)..

Any help appreciated.