Ok, since no one responded to me on how to get libcurl working under MSVC++
with ares support, I played around and figured it out. Listed here is what I
did to make it work, might not be the best way, maybe some have some
suggestions, but this did work.

First I compiled curl-ares. I changed the default C runtime library to be
the single-threaded rather than the multi-threaded (this seems to be
required to prevent linking errors later on). Then I simply build the
areslib project (the other projects adig/ahost seem to fail under MSVC).

Next was libcurl. I opened lib/config-win32.h and I added a:
 #define USE_ARES 1

Next thing I added was, near the HAVE_GETTIMEOFDAY checks I added:
#ifdef USE_ARES
#define HAVE_GETTIMEOFDAY 1
#endif

The reason is, it seems curl-ares has a gettimeofday function in it (perhaps
this should be made static in ares to avoid this kludge?) To prevent a
duplicate symbol error, I had to make sure libcurl didn't also try and
create a gettimeofday() function.

Next thing I did was I added the path for the ares includes to the include
path, and the libares.lib to the libraries.

Lastly, I also changed libcurl to be single-threaded rather than
multi-threaded, again this was to prevent some duplicate symbol errors. I'm
not sure why I needed to change everything to single-threaded, but when I
didn't I got redefinition errors for several CRT functions (malloc, stricmp,
etc.)

I would have modified the MSVC++ project files, but I only have VC.NET and
it uses a different format than VC6.0 so I didn't want to go and change
everything and remove VC6.0 support from libcurl.

Hope this helps anyone else looking to use libcurl with ares under Windows!

Dominick Meglio

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Received on 2003-12-22