diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 6f93d1d..1cdd3b6 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -3,7 +3,11 @@
 # see https://hub.docker.com/_/gcc/
 image: meszarosq/phoenix:latest
 
-build:
+stages:
+  - build
+  - test
+
+build-clang:
   stage: build
   tags:
     - linux
@@ -11,26 +15,63 @@ build:
   # instead of calling g++ directly you can also use some build toolkit like make
   # install the necessary build tools when needed
   before_script:
-    - apt update && apt -y install cmake ninja-build # libpolyclipping-dev libnlopt-cxx-dev libboost-dev
+    - apt update && apt -y install cmake ninja-build git subversion clang-7 # libpolyclipping-dev libnlopt-cxx-dev libboost-dev
   script:
-    - mkdir -p build && cd build && cmake .. -GNinja -DCMAKE_BUILD_TYPE=Release -DLIBNEST2D_BUILD_EXAMPLES=ON -DLIBNEST2D_BUILD_UNITTESTS=ON && cmake --build . --target all
+    - mkdir -p build-clang
+    - cd build-clang
+    - cmake .. -GNinja -DCMAKE_CXX_COMPILER=clang++-7 -DCMAKE_C_COMPILER=clang-7 -DCMAKE_BUILD_TYPE=Release -DLIBNEST2D_BUILD_EXAMPLES=ON -DLIBNEST2D_BUILD_UNITTESTS=ON -DRP_ENABLE_DOWNLOADING=ON
+    - cmake --build . --target all
   artifacts:
     paths:
-      - build/tests/tests_clipper_nlopt
+      - build-clang/tests/tests_clipper_nlopt
   # depending on your build setup it's most likely a good idea to cache outputs to reduce the build time
   cache:
     paths:
-      - "build/dependencies/*"
+      - "build-clang/dependencies/*"
+
+build-gcc:
+  stage: build
+  tags:
+    - linux
+    - gcc
+  # instead of calling g++ directly you can also use some build toolkit like make
+  # install the necessary build tools when needed
+  before_script:
+    - apt update && apt -y install cmake ninja-build git subversion g++ # libpolyclipping-dev libnlopt-cxx-dev libboost-dev
+  script:
+    - mkdir -p build-gcc
+    - cd build-gcc
+    - cmake .. -GNinja -DCMAKE_BUILD_TYPE=Release -DLIBNEST2D_BUILD_EXAMPLES=ON -DLIBNEST2D_BUILD_UNITTESTS=ON -DRP_ENABLE_DOWNLOADING=ON
+    - cmake --build . --target all
+  artifacts:
+    paths:
+      - build-gcc/tests/tests_clipper_nlopt
+  # depending on your build setup it's most likely a good idea to cache outputs to reduce the build time
+  cache:
+    paths:
+      - "build-gcc/dependencies/*"
 
 # run tests using the binary built before
-test:
+test-clang:
+  stage: test
+  tags:
+    - linux
+  #before_script:
+   # - apt update && apt -y install libpolyclipping22 libnlopt-cxx0 libnlopt0
+  script:
+    - cd build-clang/tests && ./tests_clipper_nlopt -r "junit" --out report-clang.xml
+  artifacts:
+    reports:
+      junit: build-clang/tests/report-clang.xml
+
+test-gcc:
   stage: test
   tags:
     - linux
   #before_script:
    # - apt update && apt -y install libpolyclipping22 libnlopt-cxx0 libnlopt0
   script:
-    - cd build/tests && ./tests_clipper_nlopt -r "junit" --out report.xml
+    - cd build-gcc/tests && ./tests_clipper_nlopt -r "junit" --out report-gcc.xml
   artifacts:
     reports:
-      junit: build/tests/report.xml
+      junit: build-gcc/tests/report-gcc.xml
\ No newline at end of file
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1e390b8..677b54d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -108,34 +108,34 @@ endif()
 include(CMakePackageConfigHelpers)
 
 write_basic_package_version_file(
-    "${CMAKE_CURRENT_BINARY_DIR}/cmakeexports/Libnest2DConfigVersion.cmake"     
+    "${CMAKE_CURRENT_BINARY_DIR}/cmakeexports/${PROJECT_NAME}ConfigVersion.cmake"     
     VERSION 1.0
     COMPATIBILITY AnyNewerVersion
 )
 
 install(TARGETS libnest2d libnest2d_headeronly ${LIBNAME} 
-  EXPORT Libnest2DTargets
+  EXPORT ${PROJECT_NAME}Targets
   RUNTIME DESTINATION bin 
   ARCHIVE DESTINATION lib
   LIBRARY DESTINATION lib
   INCLUDES DESTINATION include)
 
-export(EXPORT Libnest2DTargets 
-       FILE "${CMAKE_CURRENT_BINARY_DIR}/cmakeexports/Libnest2DTargets.cmake" 
-       NAMESPACE Libnest2D::)
+export(EXPORT ${PROJECT_NAME}Targets 
+       FILE "${CMAKE_CURRENT_BINARY_DIR}/cmakeexports/${PROJECT_NAME}Targets.cmake" 
+       NAMESPACE ${PROJECT_NAME}::)
 
 configure_file(cmake_modules/Config.cmake.in
-  "${CMAKE_CURRENT_BINARY_DIR}/cmakeexports/Libnest2DConfig.cmake"
+  "${CMAKE_CURRENT_BINARY_DIR}/cmakeexports/${PROJECT_NAME}Config.cmake"
   @ONLY
 )
 
-set(ConfigPackageLocation lib/cmake/Libnest2D)
+set(ConfigPackageLocation lib/cmake/${PROJECT_NAME})
 
-install(EXPORT Libnest2DTargets
+install(EXPORT ${PROJECT_NAME}Targets
   FILE
-    Libnest2DTargets.cmake
+    ${PROJECT_NAME}Targets.cmake
   NAMESPACE
-    Libnest2D::
+    ${PROJECT_NAME}::
   DESTINATION
     ${ConfigPackageLocation}
 )
@@ -154,8 +154,8 @@ endforeach()
 
 install(
   FILES
-    "${CMAKE_CURRENT_BINARY_DIR}/cmakeexports/Libnest2DConfig.cmake"
-    "${CMAKE_CURRENT_BINARY_DIR}/cmakeexports/Libnest2DConfigVersion.cmake"
+    "${CMAKE_CURRENT_BINARY_DIR}/cmakeexports/${PROJECT_NAME}Config.cmake"
+    "${CMAKE_CURRENT_BINARY_DIR}/cmakeexports/${PROJECT_NAME}ConfigVersion.cmake"
     "${CMAKE_CURRENT_SOURCE_DIR}/cmake_modules/FindClipper.cmake"
     "${CMAKE_CURRENT_SOURCE_DIR}/cmake_modules/FindNLopt.cmake"
     "${CMAKE_CURRENT_SOURCE_DIR}/cmake_modules/FindTBB.cmake"
@@ -165,5 +165,7 @@ install(
     Devel
 )
 
-message(STATUS "RP_USED_PACKAGES: ${RP_USED_PACKAGES}")
+rp_install_versions_file(${ConfigPackageLocation})
+
+message(STATUS "Configuration depends on packages:${_pkgstr}")
 
diff --git a/cmake_modules/Config.cmake.in b/cmake_modules/Config.cmake.in
index 96ef9a7..c264d59 100644
--- a/cmake_modules/Config.cmake.in
+++ b/cmake_modules/Config.cmake.in
@@ -1,4 +1,9 @@
 include(CMakeFindDependencyMacro)
+
+if(EXISTS ${CMAKE_CURRENT_LIST_DIR}/RPPackageVersions.cmake)
+    include(${CMAKE_CURRENT_LIST_DIR}/RPPackageVersions.cmake)
+endif()
+
 set(USED_PACKAGES @RP_USED_PACKAGES@)
 
 list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_LIST_DIR})
@@ -6,6 +11,12 @@ list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_LIST_DIR})
 set(TBB_STATIC @TBB_STATIC@)
 
 foreach(package ${USED_PACKAGES})
+    if(NOT ${CMAKE_FIND_PACKAGE_NAME}_FIND_QUIETLY)
+        if(${${package}_VERSION})
+            set(_verstr "requested version: ${${package}_VERSION}")
+        endif()
+        message(STATUS "Using dependent package: ${package} ${_verstr}")
+    endif()
     find_dependency(${package} ${${package}_VERSION})
 endforeach()
 
diff --git a/cmake_modules/RequirePackage.cmake b/cmake_modules/RequirePackage.cmake
index 7475255..65a8626 100644
--- a/cmake_modules/RequirePackage.cmake
+++ b/cmake_modules/RequirePackage.cmake
@@ -1,9 +1,13 @@
 # RP Package manager default install dir will be set globally
 set(RP_INSTALL_PREFIX ${CMAKE_BINARY_DIR}/dependencies CACHE STRING "Dependencies location")
 set(RP_BUILD_TYPE ${CMAKE_BUILD_TYPE} CACHE STRING "Build configuration for the dependencies for single config generators")
-option(RP_DISABLE_DOWNLOADING "Disable downloading of packages effectively falling back to find_package functionality" OFF)
+option(RP_ENABLE_DOWNLOADING "Enable downloading of bundled packages if not found in system." OFF)
 set(RP_REPOSITORY_DIR ${PROJECT_SOURCE_DIR}/external CACHE STRING "Package repository location")
 
+set(RP_BUILD_PATH ${CMAKE_BINARY_DIR}/rp_packages_build CACHE STRING "Binary dir for downloaded package builds")
+
+mark_as_advanced(RP_BUILD_PATH)
+
 # This variable is used to gather dependencies for export (find_dependency will be called for each package)
 # A list of the requested packages from all require_package calls.
 set(RP_USED_PACKAGES "" CACHE INTERNAL "")
@@ -45,8 +49,6 @@ function(download_package)
         set(RP_ARGS_VERSION ${ARGV1})
     endif()
 
-    set(RP_BUILD_PATH ${CMAKE_BINARY_DIR}/rp_packages_build)
-
     file(MAKE_DIRECTORY ${RP_BUILD_PATH})
 
     # Hide output if requested
@@ -135,7 +137,7 @@ macro(require_package RP_ARGS_PACKAGE RP_ARGS_VERSION)
     endif ()
     
     if(NOT ${RP_ARGS_PACKAGE}_FOUND )
-        if (NOT RP_DISABLE_DOWNLOADING)
+        if (RP_ENABLE_DOWNLOADING)
             download_package(${RP_ARGS_PACKAGE} ${RP_ARGS_VERSION} 
                          ${_QUIET}
                          ${RP_ARGS_UNPARSED_ARGUMENTS} )
@@ -148,6 +150,17 @@ macro(require_package RP_ARGS_PACKAGE RP_ARGS_VERSION)
     if (NOT RP_ARGS_NO_EXPORT)
         list(APPEND RP_USED_PACKAGES ${RP_ARGS_PACKAGE})
         set(RP_USED_PACKAGES "${RP_USED_PACKAGES}" CACHE INTERNAL "")
+        set(RP_${RP_ARGS_PACKAGE}_VERSION ${RP_ARGS_VERSION} CACHE INTERNAL "")
     endif()
     
-endmacro()
\ No newline at end of file
+endmacro()
+
+function(rp_install_versions_file dest)
+    set(_out "")
+    set(_fname ${RP_BUILD_PATH}/RPPackageVersions.cmake)
+    foreach(p ${RP_USED_PACKAGES})
+        set(_out "${_out}set(${p}_VERSION ${RP_${p}_VERSION})\n")
+    endforeach()
+    file(WRITE ${_fname} ${_out})
+    install(FILES ${_fname} DESTINATION ${dest})
+endfunction()
diff --git a/external/CMakeLists.txt b/external/CMakeLists.txt
index 76cbb2c..8a0fd05 100644
--- a/external/CMakeLists.txt
+++ b/external/CMakeLists.txt
@@ -20,8 +20,6 @@ if (NOT RP_PACKAGES)
     subdirlist(RP_PACKAGES ${CMAKE_CURRENT_LIST_DIR})
 endif()
 
-get_directory_property(hasParent PARENT_DIRECTORY)
-
 if (NOT RP_PACKAGE)
   add_custom_target(rp ALL)
   foreach(PACKAGE IN ITEMS ${RP_PACKAGES})