Fix building on OpenBSD

clamav-config.h.in

@@ -293,6 +293,9 @@
 /* Define if libtool can extract symbol lists from object files. */
 #undef HAVE_PRELOADED_SYMBOLS
 
+/* Define to 1 if you have the <pthread.h> header file */
+#undef HAVE_PTHREAD_H
+
 /* Define to 1 if you have the `pthread_yield' function. */
 #undef HAVE_PTHREAD_YIELD
 

configure

@@ -14446,6 +14446,14 @@ $as_echo "#define HAVE_FCNTL_H 1" >>confdefs.h
 fi
 
 
+ac_fn_c_check_header_mongrel "$LINENO" "pthread.h" "ac_cv_header_pthread_h" "$ac_includes_default"
+if test "x$ac_cv_header_pthread_h" = xyes; then :
+
+$as_echo "#define HAVE_PTHREAD_H 1" >>confdefs.h
+
+fi
+
+
 
 # Check whether --enable-experimental was given.
 if test "${enable_experimental+set}" = set; then :

configure.ac

@@ -419,6 +419,7 @@ AC_COMPILE_CHECK_SIZEOF([void *])
 AC_CHECK_FUNCS([sysctlbyname])
 AC_CHECK_FUNCS([getifaddrs])
 AC_CHECK_HEADER([fcntl.h], AC_DEFINE([HAVE_FCNTL_H],1,[Define to 1 if you have the <fcntl.h> header file]))
+AC_CHECK_HEADER([pthread.h], AC_DEFINE([HAVE_PTHREAD_H],1,[Define to 1 if you have the <pthread.h> header file]))
 
 AC_ARG_ENABLE([experimental],
 [  --enable-experimental	enable experimental code],

libclamav/others.h

@@ -31,6 +31,10 @@
 #include <unistd.h>
 #endif
 
+#if HAVE_PTHREAD_H
+#include <pthread.h>
+#endif
+
 #include <stdio.h>
 #include <stdlib.h>
 #include "cltypes.h"