Major It's not possible to set the line ending format for stream workspaces.
In our current situation this we must have all line endings set to Unix for some file and platform combinations.
[JENKINS-24025] Unable to set line ending format for stream workspace
Grant Limberg
added a comment - I could use one of the other options, but it's nowhere near as convenient as the Stream option on matrix builds.
My temporary workaround is to just update the workspaces manually once Jenkins creates them, but that will need to be done each time a new build node comes online, or any time a new project in Jenkins is created. A bit of a PITA. I'd appreciate having the option
Grant Limberg
added a comment - I could use one of the other options, but it's nowhere near as convenient as the Stream option on matrix builds.
My temporary workaround is to just update the workspaces manually once Jenkins creates them, but that will need to be done each time a new build node comes online, or any time a new project in Jenkins is created. A bit of a PITA. I'd appreciate having the option 
Rami Alia
added a comment - On 1.3.0 you cannot set line endings at all in manual. I've had to resort to static workspaces for some environments. Specifically am unable to set unix line endings on windows jenkins.
Rami Alia
added a comment - On 1.3.0 you cannot set line endings at all in manual. I've had to resort to static workspaces for some environments. Specifically am unable to set unix line endings on windows jenkins. Code changed in jenkins
User: Paul Allen
Path:
src/main/java/org/jenkinsci/plugins/p4/workspace/ManualWorkspaceImpl.java
http://jenkins-ci.org/commit/p4-plugin/ef7570582ad0bcbdc3545e73ac06b352f948f93e
Log:
Missing if statement in parseLineEnd.
Paul Allen
added a comment - Fixed 1.3.1 
I can add this to the 'Stream' option for generating streams workspaces.
Are you able to use the 'Manual', 'Spec', or 'Static' workspace options? I guess that they are not as easy for matrix builds as you would have to set them up individually.