+do_have_threads="no";
+AC_CHECK_LIB(pthread, pthread_create, [
+ AC_CHECK_HEADERS(pthread.h, [
+ do_have_threads="yes"
+ ])
+])
+
+AC_ARG_ENABLE([threads],
+ [AS_HELP_STRING([--enable-threads], [use threads if possible])],
+ [
+ if test x"$do_have_threads" = xyes; then
+ LIBS="$LIBS -lpthread"
+ AC_DEFINE([HAVE_THREADS], 1, [Define if you have Threads])
+ fi
+ ],
+ [])
+