using c++ library c code


i have c++ library provides several classes handling data. i have source formula library.



i wish extend c++ api support c duty calls library used c formula c++ formula during same time.



i'm controlling gnu apparatus method (gcc, glibc, etc), libel settlement support an issue.



are there any reasons since technically possible?



are there any gotcha's i need watch out for?



are there resources, instance formula and/or support accessible per this?





some things i have found out:




  1. use following hang your c++ headers need used c code.





#ifdef __cplusplus
extern "c" {  
#endif  
//  
// formula goes here ...  
//  
#ifdef __cplusplus  
} // extern "c"  
#endif



  1. keep "real" c++ interfaces removed header files enclosed c. cruise here. controlling #ifndef __cplusplus #error things helps here detect any craziness.

  2. careful c++ identifiers names c code

  3. enums varying distance between c c++ compilers. substantially an emanate you're controlling gnu apparatus chain, nonetheless still, careful.

  4. for structs follow following form c does confused.



    typedef struct x { ... } x

  5. then pointers flitting around c++ objects, only have announced c struct x where x c++ object.




all pleasantness associate who's sorceress during c++.



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