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This is the BSDA Study Guide Book written via a wiki collaboration. This is a work in progress. You may contribute to or discuss this specific page at http://bsdwiki.reedmedia.net/wiki/Recognize_the_available_methods_for_compiling_a_customized_binary.html.
Recognize the available methods for compiling a customized binary
TODO: should this be renamed s/a customized binary/customized packages/ ?
Many applications used by servers support make(1) options to compile a binary with the feature set required by a particular installation. While the BSDs all use make(1), the admin should recognize that each BSD uses different mechanisms to use and preserve make(1) options.
FreeBSD ports includes a /usr/ports/KNOBS file that lists commonly-used options with their descriptions. These "knobs" can be used with WITH_* or WITHOUT_* make variables, for example: WITH_APACHE2, WITH_ISPELL, and WITHOUT_X11. Some ports honor options like these to override the defaults.
TODO: cover /var/db/ports/portname/options, make showconfig, make rmconfig,
TODO: show examples
DragonFly: mk.conf(5) or make.conf(5), PKG_OPTIONS,
CFLAGS FreeBSD: -DWITH_* or WITH_*=, pkgtools.conf(5), make.conf(5)