Merge pull request #203 from malytomas/master

Help supporting local builds-without-install.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9c7a017..b556efc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -429,12 +429,12 @@
 configure_package_config_file("${PROJECT_NAME}-config.cmake.in" "${PROJECT_BINARY_DIR}/${PROJECT_NAME}-config.cmake"
   INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/libzip)
 
-# Add targets to the build-tree export set
-export(TARGETS zip
-  FILE "${PROJECT_BINARY_DIR}/${PROJECT_NAME}-targets.cmake")
-
-# installation
 if(LIBZIP_DO_INSTALL)
+  # Add targets to the build-tree export set
+  export(TARGETS zip
+    FILE "${PROJECT_BINARY_DIR}/${PROJECT_NAME}-targets.cmake")
+
+  # installation
   install(FILES ${PROJECT_BINARY_DIR}/zipconf.h DESTINATION include)
   install(FILES ${PROJECT_BINARY_DIR}/${PROJECT_NAME}-config.cmake ${PROJECT_BINARY_DIR}/${PROJECT_NAME}-config-version.cmake
     DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}