Linking to MSVCRT

[John Reimer]

On Wed, 24 Jan 2007 10:19:46 -0500, Robin Allen wrote:

> The Windows C runtime (MSVCRT.DLL) defines some functions, namely _open_osfhandle and _fdopen, that I need to use in my D program.
> 
> However, D doesn't seem to link to the necessary libs by default; the linker says:
> 
> Symbol Undefined __open_osfhandle at 8
> Symbol Undefined __fdopen at 8
> 
> I've tried manually linking to snn.lib, which my text editor tells me *does* include both these symbols, but to no avail. I've also tried generating my own import library for MSVCRT using implib.exe, but this just results in the additional error:
> 
> Previous Definition Different: _errno
> 
> Is there any way I can use these functions from D?


You can almost always load these functions up at runtime using
LoadLibraryA/GetProcAddress calls. Doing it that way usually allows you to
get around all those annoying import lib linking problems.  It may not be
pretty, but at least it guarantees your D program access to almost any C
based dll no matter what compiler was used to make it.

-JJR