On Thu, Dec 11, 2008 at 07:22:13PM +0100, Erik van Pienbroek wrote:
Op donderdag 11-12-2008 om 17:45 uur [tijdzone +0000], schreef Richard W.M. Jones:
The question was raised today as to whether it really works.
We expect that C will work. We (Red Hat) haven't actually tried the combination of our DLLs and MS VC-compiled C code.
We expect / are almost certain that C++ won't work. C++ code may link and fail in creative ways, such as exceptions disappearing, or maybe it just won't link at all.
Rich.
Hi,
I haven't tried cross-compiling anything with the MinGW GCC of Fedora yet, but I do have tried to call MinGW compiled DLL's (build on a Vista host) from Visual Studio 2005 and 2008 applications (both plain C code).
Mixing MinGW produced DLL's with Visual Studio applications works, but there are some caveats to it. The most annoying thing is that file pointers aren't exchangeable between MinGW and Visual Studio. Normally this isn't a problem, but for example with GLib, there's a function to open a file (g_open, which returns a file pointer), but there are no functions to read/write data to it making it practically useless in a mixed environment.
Isn't this taken care of with Microsoft's OSF conversion routines
http://msdn.microsoft.com/en-us/library/bdts1c9x(VS.71).aspx http://msdn.microsoft.com/en-us/library/ks2530z6.aspx
Specifically _open_osfhandle() and _get_osfhandle() which allow you to convert between a UNIX style 'int fd' and a Win32 HANDLE in both directions. This is what GNULIB uses to make WinSock comply with proper POSIX api contracts.
Daniel