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How To Build libcurl to Use c-ares For Asynch Name Resolves
===========================================================
c-ares:
http://c-ares.haxx.se/
NOTE
The latest libcurl version requires c-ares 1.6.0 or later.
Once upon the time libcurl built fine with the "original" ares. That is no
longer true. You need to use c-ares.
Build c-ares
============
1. unpack the c-ares archive
2. cd c-ares-dir
3. ./configure
4. make
5. make install
Build libcurl to use c-ares in the curl source tree
===================================================
1. name or symlink the c-ares source directory 'ares' in the curl source
directory
2. ./configure --enable-ares
Optionally, you can point out the c-ares install tree root with the the
--enable-ares option.
3. make
Build libcurl to use an installed c-ares
========================================
1. ./configure --enable-ares=/path/to/ares/install
2. make
c-ares on win32
===============
(description brought by Dominick Meglio)
First I compiled c-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 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.
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