Commit | Line | Data |
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09169146 GW |
1 | These are the rules so that older bsd systems and the POSIX standard |
2 | system can coexist togather. | |
3 | ||
4 | 1) If you use select then include "ntp_select.h" | |
5 | select is not standard, since it is very system depenedent as to where | |
6 | select is defined. The logic to include the right system dependent | |
7 | include file is in "ntp_select.h". | |
8 | 2) Always use POSIX defintion of strings. Inlcude "ntp_string.h" instaed | |
9 | of <string.h>. | |
10 | 3) Always include "ntp_malloc.h" if you use malloc. | |
11 | 4) Always include "ntp_io.h" instead of <sys/file.h> or <fnctl.h> to | |
12 | get O_* flags. | |
13 | 5) Always include "ntp_if.h" instead of <net/if.h>. | |
14 | 6) Always include "ntp_stdlib.h" instead of <stdlib.h>. | |
15 | 7) Always define a system identifier for any new system added to the | |
16 | machines directory. The identifier should always start with SYS_! | |
17 | 8) Define any special defines needed for a system in | |
18 | ./include/ntp_machine.h based on system identifier. This file is | |
19 | included by the "ntp_types.h" file and should always be placed | |
20 | first after the <> defines. | |
21 | 9) Define any special library prototypes left over from the system | |
22 | library and include files in the "l_stdlib.h" file. This file is | |
23 | included by the "ntp_stdlib.h" file and should ordinarily be | |
24 | placed last in the includes list. | |
25 | 10) Don't define a include file by the same name as a system include file. | |
26 | ||
27 | ||
28 | "l_stdlib.h" can contain any extra definitions that are needed so that | |
29 | gcc will shut up. They should be controlled by a system identifier and | |
30 | there should be a seperate section for each system. Really this will | |
31 | make it easier to maintain. | |
32 | ||
33 | See include/ntp_machines.h for the verious compile time options. | |
34 | ||
35 | Good luck. | |
36 | ||
37 | Bill Jones, with amendments by Dave Mills |