--- CMakeLists.txt.orig	2021-02-04 06:38:35 UTC
+++ CMakeLists.txt
@@ -8,7 +8,8 @@ if ( ${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR} 
 endif()
 
 LIST(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake")
-SET(SHARE_DIR "${CMAKE_INSTALL_PREFIX}/share/osm2pgrouting")
+SET(DOC_DIR "${CMAKE_INSTALL_PREFIX}/share/doc/osm2pgrouting")
+SET(ETC_DIR "${CMAKE_INSTALL_PREFIX}/etc/osm2pgrouting")
 
 FIND_PACKAGE(PostgreSQL REQUIRED)
 find_package(LibPQXX REQUIRED)
@@ -37,6 +38,7 @@ include(CheckCXXCompilerFlag)
 CHECK_CXX_COMPILER_FLAG("-std=c++0x" COMPILER_SUPPORTS_CXX0X)
 CHECK_CXX_COMPILER_FLAG("-std=c++11" COMPILER_SUPPORTS_CXX11)
 CHECK_CXX_COMPILER_FLAG("-std=c++14" COMPILER_SUPPORTS_CXX14)
+CHECK_CXX_COMPILER_FLAG("-std=c++17" COMPILER_SUPPORTS_CXX17)
 if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
     if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS GNU_CXX_MINIMUM_VERSION)
         message(FATAL_ERROR "GCC version must be at least ${GNU_CXX_MINIMUM_VERSION}!
@@ -50,7 +52,10 @@ else()
     message(STATUS "Unknown compiler minimum version for ${CMAKE_CXX_COMPILER_ID}")
 endif()
 
-if(COMPILER_SUPPORTS_CXX14)
+if(COMPILER_SUPPORTS_CXX17)
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++17")
+    message(STATUS "Using  -std=c++17.")
+elseif(COMPILER_SUPPORTS_CXX14)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14")
     message(STATUS "Using  -std=c++14.")
 elseif(COMPILER_SUPPORTS_CXX11)
@@ -114,14 +119,15 @@ if(WIN32)
 endif()
 
 INSTALL(FILES
-    "${CMAKE_SOURCE_DIR}/COPYING"
     "${CMAKE_SOURCE_DIR}/README.md"
-    "${CMAKE_SOURCE_DIR}/mapconfig.xml"
-    "${CMAKE_SOURCE_DIR}/mapconfig_for_cars.xml"
-    "${CMAKE_SOURCE_DIR}/mapconfig_for_bicycles.xml"
-    "${CMAKE_SOURCE_DIR}/mapconfig_for_pedestrian.xml"
-    DESTINATION "${SHARE_DIR}")
+    DESTINATION "${DOC_DIR}")
 
+FOREACH(i mapconfig.xml mapconfig_for_cars.xml mapconfig_for_bicycles.xml mapconfig_for_pedestrian.xml)
+    INSTALL(FILES
+        "${CMAKE_SOURCE_DIR}/${i}"
+        RENAME ${i}.sample
+        DESTINATION "${ETC_DIR}")
+ENDFOREACH()
 
 #INCLUDE_DIRECTORIES( ${Boost_INCLUDE_DIR} )
 #TARGET_LINK_LIBRARIES( osm2pgrouting ${Boost_LIBRARIES} )