gentoo-overlay/dev-libs/libarcus/files/libarcus-1.0.0-fix-install-paths.patch

diff -Naur a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt	2016-03-07 10:36:38.000000000 +0100
+++ b/CMakeLists.txt	2016-04-16 11:54:15.499524812 +0200
@@ -1,6 +1,7 @@
 project(arcus)
 cmake_minimum_required(VERSION 2.8.12)
 
+include(GNUInstallDirs)
 include(CMakePackageConfigHelpers)
 
 option(BUILD_PYTHON "Build " ON)
@@ -14,10 +15,12 @@
 
 if(BUILD_PYTHON)
     set(CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake)
-    if(APPLE OR WIN32)
-        set(PYTHON_SITE_PACKAGES_DIR lib/python3.4/site-packages CACHE STRING "Directory to install Python bindings to")
-    else()
-        set(PYTHON_SITE_PACKAGES_DIR lib/python3/dist-packages CACHE STRING "Directory to install Python bindings to")
+    if(NOT PYTHON_SITE_PACKAGES_DIR)
+        if(APPLE OR WIN32)
+            set(PYTHON_SITE_PACKAGES_DIR lib/python${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}/site-packages CACHE STRING "Directory to install Python bindings to")
+        else()
+            set(PYTHON_SITE_PACKAGES_DIR lib/python${PYTHON_VERSION_MAJOR}/dist-packages CACHE STRING "Directory to install Python bindings to")
+        endif()
     endif()
     find_package(SIP REQUIRED)
     include_directories(python/ src/ ${PYTHON_INCLUDE_DIR} ${SIP_INCLUDE_DIR})
@@ -57,7 +60,7 @@
 set(ARCUS_VERSION 1.0.0)
 set(ARCUS_SOVERSION 2)
 
-set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib")
+set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}")
 
 if(BUILD_STATIC)
     add_library(Arcus STATIC ${arcus_SRCS})
@@ -89,7 +92,7 @@
 target_include_directories(Arcus PUBLIC
     ${PROTOBUF_INCLUDE_DIR}
     $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src>
-    $<INSTALL_INTERFACE:include>
+    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
 )
 target_link_libraries(Arcus PUBLIC
     ${PROTOBUF_LIBRARY}
@@ -120,23 +123,23 @@
 
 install(TARGETS Arcus
     EXPORT Arcus-targets
-    RUNTIME DESTINATION bin
-    LIBRARY DESTINATION lib
-    ARCHIVE DESTINATION lib
-    PUBLIC_HEADER DESTINATION include/Arcus
+    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/Arcus
 )
 
 install(EXPORT Arcus-targets
-    DESTINATION lib/cmake/Arcus
+    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/Arcus
 )
 
-configure_package_config_file(ArcusConfig.cmake.in ${CMAKE_BINARY_DIR}/ArcusConfig.cmake INSTALL_DESTINATION lib/cmake/Arcus)
+configure_package_config_file(ArcusConfig.cmake.in ${CMAKE_BINARY_DIR}/ArcusConfig.cmake INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/Arcus)
 write_basic_package_version_file(${CMAKE_BINARY_DIR}/ArcusConfigVersion.cmake VERSION ${ARCUS_VERSION} COMPATIBILITY SameMajorVersion)
 
 install(FILES
     ${CMAKE_BINARY_DIR}/ArcusConfig.cmake
     ${CMAKE_BINARY_DIR}/ArcusConfigVersion.cmake
-    DESTINATION lib/cmake/Arcus
+    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/Arcus
 )
 
 include(CPackConfig.cmake)