- added cplusplus macro to the read_matlab.h so that it can be linked…

… against c++ files.

- Changed the simulate command to use mat as default.
- Changed the plot API accordingly.

git-svn-id: https://openmodelica.org/svn/OpenModelica/trunk@8019 f25d12d1-65f4-0310-ae8a-bbce733d8d8e

c_runtime/read_matlab4.h

@@ -37,6 +37,9 @@ typedef struct {
  * The internal data is free'd by omc_free_matlab4_reader.
  * The data persists until free'd, and is safe to use in your own data-structures
  */
+#ifdef __cplusplus
+extern "C" {
+#endif
 const char* omc_new_matlab4_reader(const char *filename, ModelicaMatReader *reader);
 
 void omc_free_matlab4_reader(ModelicaMatReader *reader);
@@ -60,5 +63,8 @@ void omc_matlab4_print_all_vars(FILE *stream, ModelicaMatReader *reader);
 double omc_matlab4_startTime(ModelicaMatReader *reader);
 
 double omc_matlab4_stopTime(ModelicaMatReader *reader);
+#ifdef __cplusplus
+} // extern "C"
+#endif
 
 #endif