Fix various issues with the CMakeLists

- Update to cmake 4
- Unhardcoded destination locations for libraries
- Fixed libdir in pkgconfig files

--- libdivsufsort-2.0.1.orig/CMakeLists.txt
+++ libdivsufsort-2.0.1/CMakeLists.txt
@@ -1,7 +1,8 @@
 ### cmake file for building libdivsufsort Package ###
-cmake_minimum_required(VERSION 2.4)
+cmake_minimum_required(VERSION 4.0)
 set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/CMakeModules")
 include(AppendCompilerFlags)
+include(GNUInstallDirs)
 
 ## SVN revision ##
 set(SVN_REVISION "")
--- libdivsufsort-2.0.1.orig/lib/CMakeLists.txt
+++ libdivsufsort-2.0.1/lib/CMakeLists.txt
@@ -5,10 +5,7 @@
 
 ## libdivsufsort ##
 add_library(divsufsort ${divsufsort_SRCS})
-install(TARGETS divsufsort
-  RUNTIME DESTINATION bin
-  LIBRARY DESTINATION lib
-  ARCHIVE DESTINATION lib)
+install(TARGETS divsufsort)
 set_target_properties(divsufsort PROPERTIES
   VERSION   "${LIBRARY_VERSION_FULL}"
   SOVERSION "${LIBRARY_VERSION_MAJOR}"
@@ -18,10 +15,7 @@
 ## libdivsufsort64 ##
 if(BUILD_DIVSUFSORT64)
   add_library(divsufsort64 ${divsufsort_SRCS})
-  install(TARGETS divsufsort64
-    RUNTIME DESTINATION bin
-    LIBRARY DESTINATION lib
-    ARCHIVE DESTINATION lib)
+  install(TARGETS divsufsort64)
   set_target_properties(divsufsort64 PROPERTIES
     VERSION   "${LIBRARY_VERSION_FULL}"
     SOVERSION "${LIBRARY_VERSION_MAJOR}"
--- libdivsufsort-2.0.1.orig/pkgconfig/CMakeLists.txt
+++ libdivsufsort-2.0.1/pkgconfig/CMakeLists.txt
@@ -1,10 +1,13 @@
 ## generate libdivsufsort.pc ##
 set(prefix "${CMAKE_INSTALL_PREFIX}")
+set(exec_prefix "\${prefix}")
+set(libdir "\${exec_prefix}/${CMAKE_INSTALL_LIBDIR}")
+set(includedir "\${prefix}/${CMAKE_INSTALL_INCLUDEDIR}")
 set(W64BIT "")
 configure_file("${CMAKE_CURRENT_SOURCE_DIR}/libdivsufsort.pc.cmake" "${CMAKE_CURRENT_BINARY_DIR}/libdivsufsort.pc" @ONLY)
-install(FILES "${CMAKE_CURRENT_BINARY_DIR}/libdivsufsort.pc" DESTINATION lib/pkgconfig)
+install(FILES "${CMAKE_CURRENT_BINARY_DIR}/libdivsufsort.pc" DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
 if(BUILD_DIVSUFSORT64)
   set(W64BIT "64")
   configure_file("${CMAKE_CURRENT_SOURCE_DIR}/libdivsufsort.pc.cmake" "${CMAKE_CURRENT_BINARY_DIR}/libdivsufsort64.pc" @ONLY)
-  install(FILES "${CMAKE_CURRENT_BINARY_DIR}/libdivsufsort64.pc" DESTINATION lib/pkgconfig)
+  install(FILES "${CMAKE_CURRENT_BINARY_DIR}/libdivsufsort64.pc" DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
 endif(BUILD_DIVSUFSORT64)
--- libdivsufsort-2.0.1.orig/pkgconfig/libdivsufsort.pc.cmake
+++ libdivsufsort-2.0.1/pkgconfig/libdivsufsort.pc.cmake
@@ -1,7 +1,7 @@
 prefix=@prefix@
-exec_prefix=${prefix}
-libdir=${exec_prefix}/lib
-includedir=${prefix}/include
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
 
 Name: @PROJECT_NAME@@W64BIT@
 Description: @PROJECT_DESCRIPTION@