Use consistent output directories

CMakeLists.txt

@@ -17,8 +17,10 @@ project(ADIOS2 VERSION 2.0.0)
 #------------------------------------------------------------------------------#
 # Some boilerplate to setup nice output directories
 #------------------------------------------------------------------------------#
-include(GNUInstallDirs)
-set(CMAKE_INSTALL_CMAKEDIR "${CMAKE_INSTALL_LIBDIR}/cmake/adios2")
+set(CMAKE_INSTALL_BINDIR bin)
+set(CMAKE_INSTALL_LIBDIR lib)
+set(CMAKE_INSTALL_INCLUDEDIR include)
+set(CMAKE_INSTALL_CMAKEDIR lib/cmake/adios2)
 
 list(INSERT CMAKE_MODULE_PATH 0 "${ADIOS2_SOURCE_DIR}/cmake")
 if(NOT CMAKE_ARCHIVE_OUTPUT_DIRECTORY)

bindings/python/CMakeLists.txt

@@ -27,7 +27,8 @@ if(ADIOS2_HAVE_MPI)
   target_link_libraries(adios2py PRIVATE PythonModule::mpi4py)
 endif()
 
-string(REGEX REPLACE "^${PYTHON_PREFIX}/" ""
+string(REGEX REPLACE
+  "^${PYTHON_PREFIX}/[^/]*/python" "${CMAKE_INSTALL_LIBDIR}/python"
   CMAKE_INSTALL_PYTHONDIR "${PYTHON_SITE_PACKAGES}"
 )
 set(CMAKE_INSTALL_PYTHONDIR "${CMAKE_INSTALL_PYTHONDIR}"