[Debian-med-packaging] Bug#900196: dcmtk: wrongly assumes that CMAKE_SYSTEM_VERSION to be non-empty

[Helmut Grohne]

Source: dcmtk
Version: 3.6.2-3
Severity: minor
Tags: patch upstream
User: helmutg at debian.org
Usertags: rebootstrap

While trying to make dcmtk cross buildable, I found a little bug in the
build system. It assumes that CMAKE_SYSTEM_VERSION is non-empty. This is
true most of the time, but CMakeDetermineSyste.cmake says:

# CMAKE_SYSTEM_VERSION - on unix this is uname -r, for windows it is empty

It also happens to break cross building as debhelper does not presently
pass this variable.

I think the best way out here would be to quote the variable to avoid
any issues. Please consider applying the attached patch.

Helmut
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