George Steel

Fed up with getting messages from freshclam saying my clamav installation was out of date, and reluctant to update one of my OpenBSD installations to latest release, I set about trying to figure out how to compile clamav from source.

I started by downloading the latest stable source from www.clamav.net (0.88.5) and tried a simple

./configure
make

I was under no illusions that this would probably fail and it did:

...
/usr/local/lib/libclamav.so.1.17: undefined reference to `pthread_mutex_lock'
/usr/local/lib/libclamav.so.1.17: undefined reference to `pthread_join'
collect2: ld returned 1 exit status

Much google-ing later I was still having no luck … I tried a number of different ./configure arguments which I found in my ports tree at /usr/ports/security/clamav/Makefile until I found this thread started by Charles Farinella on the OpenBSD Misc List

I followed the instructions in this thread to the letter; found the block of text in the configure script:

openbsd*)
    if test "$have_pthreads" = "yes"; then
	LIBCLAMAV_LIBS="$LIBCLAMAV_LIBS -pthread"
	if test "$use_cr" = "no"; then
	    CLAMD_LIBS="$CLAMD_LIBS -pthread"
	    CLAMAV_MILTER_LIBS="$CLAMAV_MILTER_LIBS -pthread"
	else
	    CLAMD_LIBS="$CLAMD_LIBS -pthread -lc_r"
	    CLAMAV_MILTER_LIBS="$CLAMAV_MILTER_LIBS -pthread -lc_r"
	fi
	TH_SAFE="-thread-safe"

and changed LIBCLAMAV_LIBS="$LIBCLAMAV_LIBS -pthread" to LIBCLAMAV_LIBS="$LIBCLAMAV_LIBS -lpthread"
did a

./configure --disable-cr --disable-clamav
make
make install

and WOO-HOO all was good!!!

Just a couple of things, After installation I tried a freshclam and it complained that I should edit /usr/local/etc/clamd|freshclam.conf files - these are usually kept in /etc not /usr/local/etc so I cd’d to /usr/local/etc renamed the conf files and soft linked the files in /etc to /usr/local/etc and voilla!

Introduction

This post is now pretty pointless. The OpenBSD 3.7 ports tree is no longer maintained so you’ll only get up to clamav 0.88.3 (I think). Take a look at this post on compiling clamav from source.

This reference document describes the process for updating
ClamAV on OpenBSD 3.7 Release via the ports system.

Requirements

• OpenBSD 3.7 Release (Although these intuctions will work on
  any version of OpenBSD with a little alteration)
• A local copy of the OpenBSD Ports tree
• This document assumes you already have a working (But out of date) copy of ClamAV installed.

Instructions

I use tcsh for my shell so you may need to alter the syntax for setting the
CVSROOT environment variable:

Update the Ports tree

Make sure you pick a cvs mirror close to you.

host: su
root# tcsh
root# setenv CVSROOT anoncvs@anoncvs.de.openbsd.org:/cvs
root# cd /usr/ports
root# cvs -q up -rOPENBSD_3_7 -Pd

Find and remove the clamav package

root# kill -s QUIT `cat /path/to/clamd.pid`
root# pkg_info -a | grep clamav
clamav-0.88.2       free virus scanner
root# pkg_delete clamav-0.88.2

Make and install the updated package and start the ClamAV daemon

root# cd /usr/ports/security/clamav
root# make install
(… Screenfulls of output ….)
root# freshclam
root# /usr/local/sbin/clamd