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Packaging your software applications

6. Defining package dependencies

Package dependencies and incompatibilities can be defined with two of the optional package information files. Delivering a compver(4) file lets you name versions of your package that are compatible with the one being installed. Delivering a depend(4) file lets you define three types of dependencies associated with your package. These dependency types are:


a prerequisite package
your package depends on the existence of another package

a reverse dependency
another package depends on the existence of your package


NOTE: This type should only be used when a pre-UNIX System V Release 4 package (that cannot deliver a depend(4) file) relies on the newer package.


an incompatible package
your package is incompatible with this one
Refer to ``depend'' and ``compver'', or the manual pages depend(4) and compver(4) for details on the formats of these files.


NOTE: Be certain that your depend and compver files have entries in the prototype(4) file. The file type should be i (for package information file).


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