output.o: In function `logg_close':
/root/clamav-0.88.4/clamscan/../shared/output.c:89: undefined reference to `pthread_mutex_lock'
/root/clamav-0.88.4/clamscan/../shared/output.c:96: undefined reference to `pthread_mutex_unlock'
output.o: In function `logg':
/root/clamav-0.88.4/clamscan/../shared/output.c:122: undefined reference to `pthread_mutex_lock'
/root/clamav-0.88.4/clamscan/../shared/output.c:129: undefined reference to `pthread_mutex_unlock'
/root/clamav-0.88.4/clamscan/../shared/output.c:140: undefined reference to `pthread_mutex_unlock'
/root/clamav-0.88.4/clamscan/../shared/output.c:168: undefined reference to `pthread_mutex_unlock'
/root/clamav-0.88.4/clamscan/../shared/output.c:191: undefined reference to `pthread_mutex_unlock'
../libclamav/.libs/libclamav.so.1.17: undefined reference to `pthread_cleanup_pop'
../libclamav/.libs/libclamav.so.1.17: undefined reference to `pthread_cleanup_push'
collect2: ld returned 1 exit status
*** Error code 1

Stop in /root/clamav-0.88.4/clamscan (line 294 of Makefile).
*** Error code 1

Stop in /root/clamav-0.88.4 (line 374 of Makefile).
*** Error code 1

Stop in /root/clamav-0.88.4 (line 233 of Makefile).