I am just trying to convert some openssl headers to Pascal (I know that there is an openssl unit in the fpc packages but it is missing the ECDSA functions which I will need later and which is main reason I am starting to look into openssl).
To get used to this entire thing I am beginning with something much more simple, I will try to get some sha hashing functions from openssl imported (I will also need them, so it would not hurt to start with them). I am referring to the header file /usr/include/openssl/sha.h (pastebin here: http://pastebin.com/dS8DY2z9 ) After appyling h2pas i have the following: http://pastebin.com/v3S3vtFR If I want to import functions in Pascal I would either declare them external and explicitly tell it the name of the library binary (this seems straightforward to me, I see no problems with this) or I load it dynamically at runtime and then ask for the addresses of the functions that I need and assign them to procedure variables (I have also done this already on some occasions and it is equally easy to understand and also raises no questions). I am confused about something else: When looking at the .h file and also when looking at the generated .pp file it seems that nowhere in the header there was any information about which .so (or .dll) to load or link against. It created empty bodies with { you must implement this function }. Now the question (and I am intentionally asking this on a Pascal list and not a C list to get an answer that better fits into my Pascal brain) how would the C compiler or linker know from where exactly to import these functions? Where is this information, how are these C folks doing these things, what kind of magic have they going on? confused, Bernd _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
