Where is the code for dirent.h (opendir, readdir, closedir)? Undefined symbol

Question

I'm using Tiny C compiler to compile some C code that uses dirent.h (Just trying to list a directory's contents) When I compile, I get these errors:

tcc: error: undefined symbol 'opendir'
tcc: error: undefined symbol 'readdir'
tcc: error: undefined symbol 'closedir'

When I open up dirent.h, here's those 3 function headers:

DIR* __cdecl opendir (const char*);
struct dirent* __cdecl readdir (DIR*);
int __cdecl closedir (DIR*);

This might sound stupid, but where is the actual code for these function headers? It seems to me that's the reason why it doesn't compile.

How can the compiler compile something with just the headers and no the .c code?

Thanks.

Answer 1

Apparently readdir, opendir, closedir are UNIX functions and not available on windows.

http://social.msdn.microsoft.com/Forums/vstudio/en-US/94eb8505-01fc-4082-99b8-87231552951d/vc-equivalent-of-dirent

UPDATE: I found some C code ported to windows which works. See link here:

http://www.two-sdg.demon.co.uk/curbralan/code/dirent/dirent.html

http://www.two-sdg.demon.co.uk/curbralan/code/dirent/dirent.c

http://www.two-sdg.demon.co.uk/curbralan/code/dirent/dirent.h

Answer 2

Stop using archaic compilers.

Just use GCC (MinGW-w64) or MSVC. You need the POSIX functionality which just happens to be implemented in MinGW-w64 GCC, so you that.