Perforce changed line endings

I had a project on Mac and uploaded it to a perforce server. When I got the project from PC all the line endings were changed and now it does not compile on PC. Is there a way to automatically change the line endings like they were before or I must submit again all the project from Windows? Is there any way to make perforce to keep my files AS THEY ARE? I really don't want to have stupid modifications in my source files.

Thanks!

EDIT:

It has to do with perforce, I just edited 10-20 files on MAC to make a multiplatform project to compile. The rest of 140k files were not changed and not even opened on Mac(they were opened by compiler to compile them:P). If I copy the project on PC the line endings are ok.