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Fed up with getting messages from freshclam saying my clamav installation was out of date, and reluctant to update one of my OpenBSD installations to latest release, I set about trying to figure out how to compile clamav from source.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