How do I install curl with ares enabled

Question

I have curl installed on the latest ubuntu via apt-get and that works fine, however I\'ve been reading about the blocking nature of the DNS lookups and discovered that it\'s

Answer 1

You need to install ares separately. You can download it here. Once downloaded, build c-ares (where current working directory is "c-ares-${VERSION}"):

cd /path/to/c-ares-${VERSION}
./configure --prefix=/destination/path/for/ares/install (NOTE: if you specify a destination directory, it must exist already! If you don't specify a prefix, content should be install at location /usr/local/include/)
make
make install

following this

Now that ares is built, you can build libcurl using ares. I had an issue referencing ares so I had to copy the ares source directly into libcurl. To do this, rename the 'include' directory created by 'make install' from configuring ares to 'ares'. Then, copy this directory to libcurl's root directory. You can now build libcurl with the ares option (where current working directory is libcurl):

cd /path/to/libcurl
./configure --enable-ares

Full example:

cd /User/${USER}/c-ares-1.10.0
mkdir installation
make clean
./configure --prefix=/User/${USER}/c-ares-1.10.0/installation
make
make install
mv installation/include installation/ares
cp installation/ares /User/${USER}/libcurl/
cd /User/${USER}/libcurl/
./configure --enable-ares
make
make install

EDIT (6/30/2015):

Know that if you're cross-compiling libcurl, you need to cross-compile c-ares with the same cross-compiler settings (--host option).

Hope this helps!