Here is some gdb output. Might be wrong, I have never used gdb before:
killall httpserver && gdb --ex=run --args /usr/bin/httpserver "-f -c /var/seafile/ccnet -d /var/seafile/seafile-data -l /var/seafile/logs/http.log -P /var/seafile/seafile-data/pids/httpserver.pid"
GNU gdb (Gentoo 7.6.1 p2) 7.6.1
Copyright (C) 2013 Free Software Foundation, Inc.
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This GDB was configured as "armv7a-hardfloat-linux-gnueabi".
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Reading symbols from /usr/bin/httpserver...(no debugging symbols found)...done.
Starting program: /usr/bin/httpserver -f\ -c\ /var/seafile/ccnet\ -d\ /var/seafile/seafile-data\ -l\ /var/seafile/logs/http.log\ -P\ /var/seafile/seafile-data/pids/httpserver.pid
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/libthread_db.so.1".
Program received signal SIGILL, Illegal instruction.
0xb6eaf0e8 in _armv7_tick () from /usr/lib/libcrypto.so.1.0.0
I am wondering. This seems to be an issue in the code and nobody cares.