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