General facts about C to C++ ILC

C++ is reentrant by default. To create a reentrant C to C++ application, compile the C program with the RENT compiler option. (See Building a reentrant C to C++ application.)

If theC code was not compiled with RENT, the C++ code must contain special directives so it can use global variables defined in the C or C++ program. This information can be found in Data equivalents.