[CRuntime] Option to build with USE_PARJAC on Windows

On Windows systems run
  $ make -f Makefile.omdev.mingw omc -j4 USE_PARJAC=yes
to build with paralle jacobians evaluation.

Author: Andreas Heuermann

OMCompiler/SimulationRuntime/c/Makefile.omdev.mingw

@@ -23,6 +23,8 @@ CONFIG_CFLAGS = -O2 -falign-functions -mstackrealign -msse2 -mfpmath=sse \
 -I$(OMDEV)/include/lis -I$(top_builddir)/ -I$(builddir_inc)/ -I. \
 -Wall -Wno-unused-variable
 CXXFLAGS = $(CFLAGS)
+OMPCC = $(CC) -fopenmp
+OMPCFLAGS= -fopenmp
 
 # Not needed since we already set fpmath
 FPMATHFORTRAN =
@@ -44,6 +46,14 @@ OBJ_EXT=.o
 endif
 endif
 
+# USE_PARJAC=yes to enable parallel Jacobians
+ifeq ($(USE_PARJAC),yes)
+  CFLAGS+=$(OMPCFLAGS) -DUSE_PARJAC
+  LDFLAGS+=$(OMPCFLAGS)
+else
+  OMPCFLAGS=
+endif
+
 defaultMakefileTarget = Makefile.omdev.mingw
 
 include Makefile.common