compver(4) FILE FORMATS 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 back-
ward compatible.
Since some packages may require installation of a specific
version of another software package, compatibility informa-
tion 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 instal-
ling "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
1