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NAME    [Toc]    [Back]

     library-specs - shared library name specifications

DESCRIPTION    [Toc]    [Back]

     Each LIB_DEPENDS item in the port tree conforms to
     where `lib_specs' is a comma-separated list of `lib_spec' of
the form:

     All libraries that a port needs must be  mentioned  in  that
list, either
     directly  or  indirectly through recursive dependencies (except, of course,
     for system libraries).

     The package system will embed correct dependency  checks  in
the built
     package,  according  to the normal shared library semantics:
any library
     with the same major number, and a  greater  or  equal  minor
number will do.

     Therefore, porters must strive to respect correct shared library semantics
 in their own ports: by bumping the  minor  number  each
time the interface
 is augmented, and by bumping the major number each time
the interface
 changes.  Note that adding functions to a library is an
     augmentation.  Removing functions is an interface change.

     The  major.minor components of the library specification are
used only as
     a build-time check.  Any library which is more  recent  than
the given major.minor
  version  will do.  If the minor component is left
empty, any minor
 will do.  If both components are left empty, any version
will do.  If
     a  specific  major  number  is  needed,  use  the form `libname.=major[.minor]'.

     The `pkgspec' part is always checked,  both  at  build-time,
and at
     pkg_add(1)  time.   If  `pkgspec' is left empty, any package
will do: in effect,
 the pkgspec used is `stem-*'.

     If a given architecture does not support  shared  libraries,
     LIB_DEPENDS will be turned into simple BUILD_DEPENDS checks.
Failure to
     mention RUN_DEPENDS if the port needs  anything  beyond  libraries from the
     dependent port will lead to strange errors.

SEE ALSO    [Toc]    [Back]

     pkg_add(1),  bsd.port.mk(5), packages(7), packages-specs(7),

HISTORY    [Toc]    [Back]

     Full support for library specifications  first  appeared  in
OpenBSD 3.1.

OpenBSD      3.6                           April      9,     2001
[ Back ]
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