LATTE.cmake: create and use imported target

cmake/Modules/Packages/LATTE.cmake

@@ -9,27 +9,25 @@ if(PKG_LATTE)
   option(DOWNLOAD_LATTE "Download the LATTE library instead of using an already installed one" ${DOWNLOAD_LATTE_DEFAULT})
   if(DOWNLOAD_LATTE)
     message(STATUS "LATTE download requested - we will build our own")
-    # Workaround for cross compilation with MinGW where ${CMAKE_INSTALL_LIBDIR}
-    # is a full path, so we need to remove the prefix
-    string(REPLACE ${CMAKE_INSTALL_PREFIX} "" _LATTE_LIBDIR ${CMAKE_INSTALL_LIBDIR})
     include(ExternalProject)
     ExternalProject_Add(latte_build
       URL https://github.com/lanl/LATTE/archive/v1.2.1.tar.gz
       URL_MD5 85ac414fdada2d04619c8f936344df14
       SOURCE_SUBDIR cmake
-      CMAKE_ARGS -DCMAKE_INSTALL_PREFIX=<INSTALL_DIR> ${CMAKE_REQUEST_PIC}
+      CMAKE_ARGS -DCMAKE_INSTALL_PREFIX=<INSTALL_DIR> ${CMAKE_REQUEST_PIC} -DCMAKE_INSTALL_LIBDIR=lib
       -DBLAS_LIBRARIES=${BLAS_LIBRARIES} -DLAPACK_LIBRARIES=${LAPACK_LIBRARIES}
       -DCMAKE_Fortran_COMPILER=${CMAKE_Fortran_COMPILER} -DCMAKE_Fortran_FLAGS=${CMAKE_Fortran_FLAGS}
       -DCMAKE_Fortran_FLAGS_${BTYPE}=${CMAKE_Fortran_FLAGS_${BTYPE}} -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
       -DCMAKE_MAKE_PROGRAM=${CMAKE_MAKE_PROGRAM} -DCMAKE_TOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE}
-      BUILD_BYPRODUCTS <INSTALL_DIR>/${_LATTE_LIBDIR}/liblatte.a
+      BUILD_BYPRODUCTS <INSTALL_DIR>/lib/liblatte.a
     )
-    add_dependencies(lammps latte_build)
     ExternalProject_get_property(latte_build INSTALL_DIR)
-    target_link_libraries(lammps PRIVATE ${INSTALL_DIR}/${_LATTE_LIBDIR}/liblatte.a ${LAPACK_LIBRARIES})
-    if(NOT LAPACK_FOUND)
-      add_dependencies(latte_build linalg)
-    endif()
+    add_library(LAMMPS::LATTE UNKNOWN IMPORTED)
+    set_target_properties(LAMMPS::LATTE PROPERTIES
+      IMPORTED_LOCATION "${INSTALL_DIR}/lib/liblatte.a"
+      INTERFACE_LINK_LIBRARIES "${LAPACK_LIBRARIES}")
+    target_link_libraries(lammps PRIVATE LAMMPS::LATTE)
+    add_dependencies(LAMMPS::LATTE latte_build)
   else()
     find_package(LATTE)
     if(NOT LATTE_FOUND)