compver(4) (Essential Utilities) compver(4)
NAME
compver - compatible versions file
DESCRIPTION
compver is an ASCII file used to specify previous versions of the
associated package which are upward compatible. It is created by a
package developer.
Each line of the file specifies a previous version of the associated
package with which the current version is backward compatible.
Since some packages may require installation of a specific version of
another software package, compatibility information is extremely
crucial. Consider, for example, a package called "A" which requires
version "1.0" of application "B" as a prerequisite for installation.
If the customer installing "A" has a newer version of "B" (version
1.3), the compver file for "B" must indicate that "1.3" is compatible
with version "1.0" in order for the customer to install package "A".
NOTES
The comparison of the version string disregards white space and tabs.
It is performed on a word-by-word basis. Thus "Version 1.3"
and "Version 1.3" would be considered the same.
EXAMPLE
A sample compver file is shown below.
Version 1.3
Version 1.0
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