Update top level CMake so UAMMD is not installed automatically when u…

…sing FetchContent

CMakeLists.txt

@@ -1,19 +1,27 @@
 cmake_minimum_required(VERSION 3.10)
 project(uammd)
-# Install headers
-file(GLOB_RECURSE headers src/*)
+if (CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME)
+  set(UAMMD_MASTER_PROJECT ON)
+else()
+  set(UAMMD_MASTER_PROJECT OFF)
+endif()
+if(UAMMD_MASTER_PROJECT)
+  file(GLOB_RECURSE headers src/*)
 
-foreach(header ${headers})
-	get_filename_component(header_path ${header} PATH)
-	file(RELATIVE_PATH header_path_rel ${CMAKE_CURRENT_SOURCE_DIR}/src ${header_path})
-	install(FILES ${header} DESTINATION include/uammd/${header_path_rel})
-endforeach()
+  foreach(header ${headers})
+    get_filename_component(header_path ${header} PATH)
+    file(RELATIVE_PATH header_path_rel ${CMAKE_CURRENT_SOURCE_DIR}/src ${header_path})
+    install(FILES ${header} DESTINATION include/uammd/${header_path_rel})
+  endforeach()
 
-# Install FindUAMMD.cmake
-install(FILES cmake/FindUAMMD.cmake DESTINATION share/cmake/Modules)
+  install(FILES
+    "${CMAKE_CURRENT_SOURCE_DIR}/cmake/FindUAMMD.cmake"
+    DESTINATION ${CMAKE_INSTALL_PREFIX}/lib/cmake/UAMMD)
 
-include(${CMAKE_CURRENT_LIST_DIR}/cmake/UAMMDSetup.cmake)
-install(FILES
+  install(FILES
     "${CMAKE_CURRENT_SOURCE_DIR}/cmake/UAMMDSetup.cmake"
     DESTINATION ${CMAKE_INSTALL_PREFIX}/lib/cmake/UAMMD
-)
+  )
+endif()
+
+include(${CMAKE_CURRENT_LIST_DIR}/cmake/UAMMDSetup.cmake)