add checks for berkeley DB code to configure.ac

configure.ac

@@ -207,7 +207,7 @@ if test "x$JACK_USE_MACH_THREADS" != "x"; then
 fi
 
 # headers
-AC_CHECK_HEADERS(string.h strings.h alloca.h)
+AC_CHECK_HEADERS(string.h strings.h alloca.h db.h)
 AC_CHECK_HEADERS(getopt.h, [], [
     for d in /Developer/SDKs/MacOSX10.3.0.sdk/usr/include/ ; do
 	AC_CHECK_HEADERS($d/getopt.h, [], [CFLAGS="$CFLAGS -I$d"])
@@ -230,6 +230,7 @@ AC_CHECK_FUNC(pthread_create, [],
 AC_CHECK_FUNCS(on_exit atexit)
 AC_CHECK_FUNCS(posix_memalign)
 AC_CHECK_LIB(m, sin)
+AC_CHECK_LIB(db, db_create)
 
 echo -n "Checking for ppoll()... "
 AC_EGREP_CPP( ppoll,