[BE] adjust daeMode flag

Belonging to [master]:
  - #2831
  - OpenModelica/OpenModelica-testsuite#1090

Compiler/Script/CevalScriptBackend.mo

@@ -468,7 +468,7 @@ algorithm
   GlobalScript.SIMULATION_OPTIONS(startTime, stopTime, numberOfIntervals, stepSize, tolerance, method, _, options, outputFormat, variableFilter, cflags, simflags) := inSimOpt;
   if UseOtimica then
     method := DAE.SCONST("optimization");
-  elseif  Flags.getConfigEnum(Flags.DAE_MODE) > 1 then
+  elseif  Flags.getConfigBool(Flags.DAE_MODE) then
     method := DAE.SCONST("ida");
   end if;
   numberOfIntervals := if UseOtimica then DAE.ICONST(50) else numberOfIntervals;
@@ -3331,7 +3331,7 @@ protected function callTranslateModel
   output String outFileDir;
   output list<tuple<String,Values.Value>> resultValues;
 algorithm
-  if Flags.getConfigEnum(Flags.DAE_MODE) > 1 then
+  if Flags.getConfigBool(Flags.DAE_MODE) then
     (outCache, outStringLst, outFileDir, resultValues) :=
     SimCodeMain.translateModelDAEMode(inCache,inEnv,className,inFileNamePrefix,
     inSimSettingsOpt,Absyn.FUNCTIONARGS({},{}));

Compiler/Template/CodegenC.tpl

@@ -1162,7 +1162,7 @@ template simulationFile(SimCode simCode, String guid, String isModelExchangeFMU)
       data.modelData = &modelData;
       data.simulationInfo = &simInfo;
       measure_time_flag = <% if profileHtml() then "5" else if profileSome() then "1" else if profileAll() then "2" else "0" /* Would be good if this was not a global variable...*/ %>;
-      compiledInDAEMode = <%intSub(Flags.getConfigEnum(Flags.DAE_MODE), 1)%>;
+      compiledInDAEMode = <% if Flags.getConfigBool(Flags.DAE_MODE) then 1 else 0%>;
       compiledWithSymSolver = <% intSub(Flags.getConfigEnum(Flags.SYM_SOLVER), 0) %>;
       <%mainInit%>
       <%mainTop(mainBody,"https://trac.openmodelica.org/OpenModelica/newticket")%>
@@ -1189,7 +1189,7 @@ end simulationFile;
 template simulationFileHeader(String fileNamePrefix)
   "Generates header part of simulation file."
 ::=
-    let daeHeader = if intGt(Flags.getConfigEnum(Flags.DAE_MODE), 1) then '#include "<%fileNamePrefix%>_16dae.h"'
+    let daeHeader = if Flags.getConfigBool(Flags.DAE_MODE) then '#include "<%fileNamePrefix%>_16dae.h"'
     <<
     #include "<%fileNamePrefix%>_model.h"
     <%daeHeader%>

Compiler/Util/Flags.mo

@@ -1336,13 +1336,9 @@ constant ConfigFlag CT_STATE_MACHINES = CONFIG_FLAG(94, "ctStateMachines",
   Util.gettext("Experimental: Enable continuous-time state machine prototype"));
 
 constant ConfigFlag DAE_MODE = CONFIG_FLAG(95, "daeMode",
-  NONE(), EXTERNAL(), ENUM_FLAG(1, {("none", 1), ("all",2), ("dynamic",3), ("new",4)}),
-  SOME(STRING_OPTION({"none", "all", "dynamic"})),
-  Util.gettext("Generates additional code for DAE mode, where the equations are not causelized, when one of the following option is selected:\n"+
-               "all     : In this mode all equations are passed to the integrator.\n"+
-               "dynamic : In this mode only the equation for the dynamic part of the system are passed to the integrator."+
-               "new     : This option enables the new daeMode. Currently alpha development status.\n")
-);
+  NONE(), EXTERNAL(), BOOL_FLAG(false), NONE(),
+  Util.gettext("Generates code to simulate models in DAE mode. The whole system is passed directly to the DAE solver"+
+               "SUNDIALS/IDA and no algebraic solver are involed for the simulation process."));
 
 constant ConfigFlag INLINE_METHOD = CONFIG_FLAG(96, "inlineMethod",
   NONE(), EXTERNAL(), ENUM_FLAG(1, {("replace",1), ("append",2)}),