diff -up lensfun-0.3.2/docs/CMakeLists.txt.INSTALL_HELPER_SCRIPTS lensfun-0.3.2/docs/CMakeLists.txt

--- lensfun-0.3.2/docs/CMakeLists.txt.INSTALL_HELPER_SCRIPTS	2016-01-03 11:43:52.326346877 -0600

+++ lensfun-0.3.2/docs/CMakeLists.txt	2016-01-03 11:44:51.628838749 -0600

@@ -22,6 +22,7 @@ ADD_CUSTOM_TARGET(doc

 # install documentation  

 INSTALL(DIRECTORY ${CMAKE_DOC_OUT}/ DESTINATION ${CMAKE_INSTALL_DOCDIR})

+IF(INSTALL_HELPER_SCRIPTS)

 # create and install man pages

 FIND_PROGRAM(RST2MAN_EXECUTABLE NAMES rst2man rst2man.py rst2man2 rst2man2.py)

 ADD_CUSTOM_TARGET(man ALL)

@@ -39,3 +40,4 @@ INSTALL(FILES

     ${CMAKE_CURRENT_BINARY_DIR}/lensfun-add-adapter.1 

     DESTINATION ${CMAKE_INSTALL_MANDIR}/man1

 )

+ENDIF(INSTALL_HELPER_SCRIPTS)