Varying declarations of BN_print

[pascal-cuoq]

The header bn.h defines the function BN_print differently depending whether bio.h is included:

#ifdef HEADER_BIO_H
int BN_print(BIO *fp, const BIGNUM *a);
#else
int BN_print(void *fp, const BIGNUM *a);
#endif

Only one type is allowable for BN_print, the type with which the function is defined (C11 6.2.7:2 “All declarations that refer to the same object or function shall have compatible type; otherwise, the behavior is undefined”). The types void * and BIO * are not compatible, and neither are the types of functions taking one or the other as argument.

Does anyone know what problem the hack above is supposed to solve and whether it is still useful?

[bob-beck]

Whatever it was meant to solve in the 90's doesn't matter anymore... Let's just include the proper header ahead of time.. fixed in tree..