Add FetchContent to cmake build and link properly

CMakeLists.txt

 cmake_minimum_required (VERSION 3.20.3)
 project (OPALX VERSION 2024.1.00 LANGUAGES C CXX)
+include(FetchContent)
 set (PROJECT_BUGREPORT opal@lists.psi.ch)
 
 set (OPALX_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
@@ -72,26 +73,36 @@ message (STATUS "The C++ compiler version is: ${CMAKE_CXX_COMPILER_VERSION}")
 message (STATUS "The MPI C++ compiler is: ${MPI_CXX_COMPILER}")
 message (STATUS "The underlying C++ compiler is: ${CMAKE_CXX_COMPILER}")
 
-find_package(Heffte 2.2.0 REQUIRED)
-message (STATUS "Found Heffte_DIR: ${Heffte_DIR}")
-find_library(HEFFTE_LIBRARY heffte HINTS ${Heffte_DIR}/../..)
-message (STATUS "Found HEFFTE lib: ${HEFFTE_LIBRARY}")
-
-
-find_package(Kokkos REQUIRED)
-message (STATUS "Found Kokkos_DIR: ${Kokkos_DIR}")
-if ("${Kokkos_DEVICES}" MATCHES "CUDA")
-    set (CMAKE_CXX_FLAGS_DEBUG "-O0 -g -G --diag-suppress=20011")
-endif()
-find_library(KOKKOS_LIBRARY1 NAMES kokkoscore HINTS ${Kokkos_DIR}/../..)
-find_library(KOKKOS_LIBRARY2 NAMES kokkoscontainers HINTS ${Kokkos_DIR}/../..)
-find_library(KOKKOS_LIBRARY3 NAMES kokkossimd HINTS ${Kokkos_DIR}/../..)
-message (STATUS "Found Kokkos lib: ${KOKKOS_LIBRARY1}:${KOKKOS_LIBRARY2}:${KOKKOS_LIBRARY3}")
+#find_package(Heffte 2.2.0 REQUIRED)
+#message (STATUS "Found Heffte_DIR: ${Heffte_DIR}")
+#find_library(HEFFTE_LIBRARY heffte HINTS ${Heffte_DIR}/../..)
+#message (STATUS "Found HEFFTE lib: ${HEFFTE_LIBRARY}")
+#
+#
+#find_package(Kokkos REQUIRED)
+#message (STATUS "Found Kokkos_DIR: ${Kokkos_DIR}")
+#if ("${Kokkos_DEVICES}" MATCHES "CUDA")
+#    set (CMAKE_CXX_FLAGS_DEBUG "-O0 -g -G --diag-suppress=20011")
+#endif()
+#find_library(KOKKOS_LIBRARY1 NAMES kokkoscore HINTS ${Kokkos_DIR}/../..)
+#find_library(KOKKOS_LIBRARY2 NAMES kokkoscontainers HINTS ${Kokkos_DIR}/../..)
+#find_library(KOKKOS_LIBRARY3 NAMES kokkossimd HINTS ${Kokkos_DIR}/../..)
+#message (STATUS "Found Kokkos lib: ${KOKKOS_LIBRARY1}:${KOKKOS_LIBRARY2}:${KOKKOS_LIBRARY3}")
 
-find_package (Ippl REQUIRED)
 message (STATUS "Found IPPL_DIR: ${IPPL_DIR}")
-
-find_library(IPPL_LIBRARY ippl HINTS ${IPPL_LIBRARY_DIR}) 
+if(NOT IPPL_VERSION)
+    set(IPPL_VERSION "3.2.0")
+    message(STATUS "Defaulting to IPPL-${IPPL_VERSION}")
+endif()
+FetchContent_Declare(ippl
+    #URL https://github.com/IPPL-framework/ippl/archive/refs/tags/IPPL-${IPPL_VERSION}.tar.gz
+    GIT_REPOSITORY https://github.com/IPPL-framework/ippl.git
+    GIT_SHALLOW True
+    DOWNLOAD_EXTRACT_TIMESTAMP True
+)
+FetchContent_MakeAvailable(ippl)
+include_directories("${IPPL_SOURCE_DIR}/src")
+#find_library(IPPL_LIBRARY ippl HINTS ${IPPL_LIBRARY_DIR}) 
 
 message (STATUS "Found Ippl_INC: ${IPPL_INCLUDE_DIR}")
 message (STATUS "Found Ippl_LIB: ${IPPL_LIBRARY}")

src/CMakeLists.txt

@@ -89,14 +89,18 @@ add_library (libOPAL ${OPAL_SRCS})
 set_target_properties (libOPAL PROPERTIES OUTPUT_NAME OPAL)
 
 target_link_libraries (libOPAL
+    PUBLIC
     ${MPI_CXX_LIBRARIES}
-    )
+    ippl
+    Heffte
+)
 
 message (STATUS "OPAL_LIBS is: " ${CMAKE_BINARY_DIR})
 
 add_executable (opalx Main.cpp)
 target_link_libraries( opalx
-    ${CMAKE_BINARY_DIR}/src/libOPAL.a
+    PUBLIC
+    libOPAL
     ${KOKKOS_LIBRARY1}
     ${KOKKOS_LIBRARY2}
     ${KOKKOS_LIBRARY3}
@@ -133,4 +137,4 @@ set (HDRS
     changes.h
     )
 
-install (FILES ${HDRS} DESTINATION "${CMAKE_INSTALL_PREFIX}/include/src")
\ No newline at end of file
+install (FILES ${HDRS} DESTINATION "${CMAKE_INSTALL_PREFIX}/include/src")