some files have different license header
We want to include cppcheclipse in our Eclipse-based product, however, we did a licence review and have a few questions.
This cppchecklipse-project is developed under Apache 2.0 license but the following files contain other license artifacts:
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EPL-1.0 in https://github.com/kwin/cppcheclipse/blob/master/com.googlecode.cppcheclipse.ui/src/com/googlecode/cppcheclipse/ui/preferences/CheckedTreeEditor.java
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EPL-1.0 in https://github.com/kwin/cppcheclipse/blob/master/com.googlecode.cppcheclipse.feature/feature.xml
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CPL-1.0 in cppcheclipse-https://github.com/kwin/cppcheclipse/blob/master/com.googlecode.cppcheclipse.ui/src/com/googlecode/cppcheclipse/ui/preferences/FieldEditorOverlayPage.java
Can you clarify why there are different license artifacts than Apache 2.0? Have all copyright holders agreed to use Apache 2.0?