Merge pull request #501 from m-a-d-n-e-s-s/500-lapack_libraries-may-c…

…ontain-imported-targets-make-sure-they-are-available

resolve `IMPORTED` targets in `LAPACK_LIBRARIES`

cmake/madness-config.cmake.in

@@ -226,3 +226,10 @@ if (@LIBXC_FOUND@)
   set(LIBXC_FOUND 1)
 endif()
 
+### LAPACK_LIBRARIES might include IMPORTED targets that are not globally available
+if (LAPACK_LIBRARIES MATCHES OpenMP::OpenMP_C AND NOT TARGET OpenMP::OpenMP_C)
+  find_package(OpenMP REQUIRED COMPONENTS C)
+endif()
+if (LAPACK_LIBRARIES MATCHES Threads::Threads AND NOT TARGET Threads::Threads)
+  find_package(Threads REQUIRED)
+endif()

external/lapack.cmake

@@ -117,6 +117,14 @@ if (USER_LAPACK_LIBRARIES)
     endif(USER_LAPACK_LIBRARIES_IS_ACML)
   endif(USER_LAPACK_LIBRARIES_IS_MKL)
 
+  # LAPACK_LIBRARIES might include IMPORTED targets that are not globally available
+  if (LAPACK_LIBRARIES MATCHES OpenMP::OpenMP_C AND NOT TARGET OpenMP::OpenMP_C)
+    find_package(OpenMP REQUIRED COMPONENTS C)
+  endif()
+  if (LAPACK_LIBRARIES MATCHES Threads::Threads AND NOT TARGET Threads::Threads)
+    find_package(Threads REQUIRED)
+  endif()
+
 endif(USER_LAPACK_LIBRARIES)
 
 cmake_pop_check_state()

src/madness/CMakeLists.txt

@@ -94,7 +94,13 @@ if(HAVE_IBMBGQ OR HAVE_IBMBGP)
   target_link_libraries(madness PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/new_mtxmq/bests/libMADMTXM.a)
 endif()
 if (LAPACK_FOUND)
-  target_link_libraries(madness PUBLIC ${LAPACK_LIBRARIES})
+
+	# if LAPACK_LIBRARIES includes IMPORTED targets make sure they are available
+	if (LAPACK_LIBRARIES MATCHES OpenMP::OpenMP_C AND NOT TARGET OpenMP::OpenMP_C)
+		find_package(OpenMP REQUIRED COMPONENTS C)
+	endif()
+
+	target_link_libraries(madness PUBLIC ${LAPACK_LIBRARIES})
 	if (LAPACK_INCLUDE_DIRS)
 		target_include_directories(madness PUBLIC ${LAPACK_INCLUDE_DIRS})
 	endif(LAPACK_INCLUDE_DIRS)