IPv6 CARE, "IPv6 Compliant Automatic Runtime Environment", provides an environment where applications instantly become IPv6-compliant ('patch' mode, see RFC6535). It can also generate a diagnosis about the IPv6 compliance of an application ('check' mode). It uses an LD_PRELOAD-based library injection technique.

Check the User Guide.

Once installed you can also check the man page:

man ipv6_care

Download the archive from here.

Then:

tar xfz ipv6_care-*.tar.gz
cd ipv6_care-*
./configure
make
make check # optionally
sudo make install

Fork this github project.

Then:

git clone https://github.com/<yourself>/ipv6-care
cd ipv6-care
scripts/getsourceinfo.sh
autoreconf -i
./configure
make
make check # optionally
sudo make install

Do not hesitate to propose enhancements or bugfixes using github pull requests. Thanks!

ipv6-care check <your_program_and_arguments> # assess IPv6 compliance of your program

ipv6-care patch <your_program_and_arguments> # patch your program to make it compliant