Use GNUInstallDirs to fix installation problems on mac

CMakeLists.txt

@@ -353,6 +353,9 @@ if (PARTHENON_ENABLE_ASCENT)
   find_package(Ascent REQUIRED NO_DEFAULT_PATH)
 endif()
 
+# Installation configuration
+include(GNUInstallDirs)
+
 add_subdirectory(src)
 add_subdirectory(example)
 add_subdirectory(benchmarks)

cmake/parthenonConfig.cmake.in

@@ -11,6 +11,14 @@
 # the public, perform publicly and display publicly, and to permit others to do so.
 #=========================================================================================
 
+if(NOT PARTHENON_CMAKE)
+  cmake_path(SET PARTHENON_CMAKE_BASE_DIR NORMALIZE "${CMAKE_CURRENT_LIST_DIR}/..")
+  message(STATUS "Appending parthenon cmake module directory: " ${PARTHENON_CMAKE_BASE_DIR})
+  list(APPEND CMAKE_MODULE_PATH ${PARTHENON_CMAKE_BASE_DIR})
+  set(PARTHENON_CMAKE TRUE)
+endif()
+
+
 # Favor using the kokkos package that was built with parthenon, if one has not been specified
 if (@PARTHENON_IMPORT_KOKKOS@)
   find_package(Kokkos 3 REQUIRED PATHS @Kokkos_DIR@ NO_DEFAULT_PATH)
@@ -37,4 +45,6 @@ if(@OpenMP_FOUND@)
   find_package(OpenMP REQUIRED COMPONENTS CXX)
 endif()
 
+find_package(Filesystem REQUIRED COMPONENTS Experimental Final)
+
 include("${CMAKE_CURRENT_LIST_DIR}/parthenonTargets.cmake")

src/CMakeLists.txt

@@ -328,11 +328,7 @@ target_include_directories(parthenon PUBLIC
   $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/parthenon>
   )
 
-install(TARGETS parthenon EXPORT parthenonTargets
-  INCLUDES DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/parthenon"
-  LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}"
-  ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}"
-)
+install(TARGETS parthenon EXPORT parthenonTargets)
 
 # Maintain directory structure in installed include files
 install(DIRECTORY . DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/parthenon" FILES_MATCHING PATTERN "*.hpp")
@@ -343,6 +339,8 @@ install(FILES ${CMAKE_CURRENT_BINARY_DIR}/generated/config.hpp
 
 install(FILES ${PROJECT_BINARY_DIR}/cmake/parthenonConfig.cmake DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/parthenon")
 
+install(FILES ${PROJECT_SOURCE_DIR}/cmake/FindFilesystem.cmake DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake")
+
 install(EXPORT parthenonTargets
     FILE parthenonTargets.cmake
     NAMESPACE Parthenon::