[FMI] added debug flag "disableFMIDependencies"

 - disables also the directional derivatives

Belonging to [master]:
  - #2652
  - OpenModelica/OpenModelica-testsuite#1033

Author: Willi Braun

Compiler/SimCode/SimCodeMain.mo

@@ -850,7 +850,7 @@ algorithm
       (dlow, initDAE, initDAE_lambda0, inlineData, removedInitialEquationLst) := BackendDAEUtil.getSolvedSystem(dlow,inFileNamePrefix,strPostOptModules=strOptPostOptModules);
 
       // generate derivatives
-      if isFMI2 then
+      if isFMI2 and not Flags.isSet(Flags.FMI20_DEPENDENCIES) then
         // activate symolic jacobains for fmi 2.0
         // to provide dependence information and partial derivatives
         (fmiDer, funcs) := SymbolicJacobian.createFMIModelDerivatives(dlow);

Compiler/SimCode/SimCodeUtil.mo

@@ -12005,8 +12005,33 @@ algorithm
           SimCode.FMIDISCRETESTATES(discreteStates),
           SimCode.FMIINITIALUNKNOWNS({})));
 else
-  Error.addInternalError("SimCodeUtil.createFMIModelStructure failed", sourceInfo());
-  fail();
+  // create empty model structure
+  try
+    // create empty derivatives dependencies
+    derivatives := list(createFmiUnknownFromSimVar(v,1) for v in inModelInfo.vars.derivativeVars);
+
+    // create empty output dependencies
+    varsA := List.filterOnTrue(inModelInfo.vars.algVars, isOutputSimVar);
+    outputs := list(createFmiUnknownFromSimVar(v,1) for v in varsA);
+
+    // create empty clockedStates dependencies
+    clockedStates := List.filterOnTrue(inModelInfo.vars.algVars, isClockedStateSimVar);
+    discreteStates := list(createFmiUnknownFromSimVar(v,1) for v in clockedStates);
+
+    contPartSimDer := NONE();
+
+    outFmiModelStructure :=
+      SOME(
+        SimCode.FMIMODELSTRUCTURE(
+          SimCode.FMIOUTPUTS(outputs),
+          SimCode.FMIDERIVATIVES(derivatives),
+          contPartSimDer,
+          SimCode.FMIDISCRETESTATES(discreteStates),
+          SimCode.FMIINITIALUNKNOWNS({})));
+  else
+    Error.addInternalError("SimCodeUtil.createFMIModelStructure failed", sourceInfo());
+    fail();
+  end try;
 end try;
 end createFMIModelStructure;
 

Compiler/Util/Flags.mo

@@ -538,6 +538,8 @@ constant DebugFlag NF_EXPAND_OPERATIONS = DEBUG_FLAG(181, "nfExpandOperations",
   Util.gettext("Expand all unary/binary operations to scalar expressions in the new frontend."));
 constant DebugFlag NF_API = DEBUG_FLAG(182, "nfAPI", false,
   Util.gettext("Enables experimental new instantiation use in the OMC API."));
+constant DebugFlag FMI20_DEPENDENCIES = DEBUG_FLAG(183, "disableFMIDependency", false,
+  Util.gettext("Disables the dependency analysis and generation for FMI 2.0."));
 
 // This is a list of all debug flags, to keep track of which flags are used. A
 // flag can not be used unless it's in this list, and the list is checked at
@@ -726,7 +728,8 @@ constant list<DebugFlag> allDebugFlags = {
   NF_SCALARIZE,
   NF_EVAL_CONST_ARG_FUNCS,
   NF_EXPAND_OPERATIONS,
-  NF_API
+  NF_API,
+  FMI20_DEPENDENCIES
 };
 
 public