changed: redo restarting support

store restart data separate from visualization data.
this has several advantages:
- no unusual striding in visualization files due to multistep methods
- we can store data which are not on a per-control-point basis
- simplify logic

cmake/Modules/FindIFEMDeps.cmake

@@ -222,6 +222,17 @@ if(IFEM_USE_ISTL)
   endif()
 endif()
 
+# Cereal
+if(IFEM_USE_CEREAL)
+  find_path(CEREAL_INCLUDE_DIRS NAMES cereal/cereal.hpp)
+  if(CEREAL_INCLUDE_DIRS)
+    list(APPEND IFEM_DEPINCLUDES ${CEREAL_INCLUDE_DIRS})
+    list(APPEND IFEM_DEFINITIONS -DHAS_CEREAL=1)
+    message(STATUS "Cereal serialization support enabled")
+    set(CEREAL_FOUND 1)
+  endif()
+endif()
+
 # Portability issues
 include(CheckFunctionExists)
 set(CMAKE_REQUIRED_DEFINITIONS)

cmake/Modules/IFEMOptions.cmake

@@ -11,6 +11,7 @@ OPTION(IFEM_USE_SAMG           "Compile with SAMG support?"           OFF)
 OPTION(IFEM_USE_HDF5           "Compile with HDF5 support?"           ON)
 OPTION(IFEM_USE_VTFWRITER      "Compile with VTFWriter support?"      ON)
 OPTION(IFEM_USE_UMFPACK        "Compile with UMFPACK support?"        ON)
+OPTION(IFEM_USE_CEREAL         "Compile with cereal support?"         ON)
 OPTION(IFEM_AS_SUBMODULE       "Compile IFEM as a submodule of apps?" OFF)
 OPTION(IFEM_WHOLE_PROG_OPTIM   "Compile IFEM with link-time optimizations?" OFF)
 OPTION(IFEM_TEST_MEMCHECK      "Run tests through valgrind?"          OFF)

cmake/Templates/IFEMConfig.cmake.in

@@ -1,7 +1,7 @@
 if(NOT IFEM_FOUND)
   set(IFEM_INCLUDE_DIRS @IFEM_INCLUDE_DIRS@)
   set(IFEM_LIBRARIES -L@CMAKE_INSTALL_PREFIX@/@CMAKE_INSTALL_LIBDIR@ -lIFEM @IFEM_DEPLIBS@)
-  set(IFEM_DEFINITIONS "@IFEM_DEFINITIONS@")
+  set(IFEM_DEFINITIONS @IFEM_DEFINITIONS@)
   set(IFEM_CXX_FLAGS "@IFEM_CXX_FLAGS@")
 
   list(APPEND CMAKE_MODULE_PATH @CMAKE_INSTALL_PREFIX@/lib/IFEM)
@@ -12,6 +12,7 @@ if(NOT IFEM_FOUND)
   set(ISTL_FOUND @ISTL_FOUND@)
   set(MPI_FOUND @MPI_FOUND@)
   set(HDF5_FOUND @HDF5_FOUND@)
+  set(CEREAL_FOUND @CEREAL_FOUND@)
 
   set(IFEM_REGTEST_SCRIPT ${IFEM_PATH}/scripts/regtest.sh.in)
   set(IFEM_CHECKCOMMITS_SCRIPT ${IFEM_PATH}/CheckCommits.cmake)