macros define a list of additional libraries to link against by name
(using the loader's -l switch).
All devtools/OS files define defaults for this
macro, so be sure to APPENDDEF( ) to avoid overwriting your defaults:
It is unlikely that you will have to add or change libraries in this
list. To discover any you might need, run Build
to completion and observe which routines the linker reports as
The _prog_ part of the macro name is optional.
If present, it should be the name of the specific program for which
the build is being run. In the preceding example,
-lwrap will be included in only the
sendmail program's build, but
not in any other program's build (as, for example,
makemap). By excluding the
_prog_ part of the macro name you create a
declaration that affects all programs.
Note that for the mail.local program the
_prog_ part can be either
mail.local or mail_local
with no difference in effect.