From Mourad Boufarguine,

"There is a redundant cmake code at the end of osgViewer cmake script. The install command is issued in SETUP_LIBRARY macro."
"I spotted this when i tried a make install on the android port :) I saw some weird copy commands of osgViewer headers.
I managed to get all osg headers copied to cmake_install_prefix/include upon make install, but i can't (yet) get the libraries to be copied to cmake_install_prefix/lib (see attached files)"

src/osgViewer/CMakeLists.txt

@@ -249,13 +249,3 @@ IF(MINGW OR CYGWIN)
 ENDIF()
 
 SETUP_LIBRARY(${LIB_NAME})
-
-FOREACH(INCLUDEFILE ${TARGET_H} )
-   FILE(RELATIVE_PATH REL_INCLUDEFILE ${HEADER_PATH} ${INCLUDEFILE})
-   GET_FILENAME_COMPONENT(REL_INCLUDE_PATH ${REL_INCLUDEFILE} PATH)
-   INSTALL(
-   FILES        ${INCLUDEFILE}
-   DESTINATION ${INSTALL_INCDIR}/${LIB_NAME}/${REL_INCLUDE_PATH}
-   COMPONENT libopenscenegraph-dev
-   )
-ENDFOREACH()