asymptote

If installing rapidjson

The package is rather old, warnings are treated as errors and gcc has several new waenings since this was released. From gentoo, use a sed to get rid of Werror:

sed -i -e 's| -Werror||g' CMakeLists.txt \
 example/CMakeLists.txt \
 test/unittest/CMakeLists.txt

Alternatively use git master at ​https://github.com/Tencent/rapidjson/