top-level build target that triggers 'make doc-html-doxygen'

[Saifi Khan <saifi.khan@xxxxxxxxx>]

Hi:

Does anyone know what is the top-level Makefile build target that 
triggers 'make doc-html-doxygen' in libstdc++ ?

Using the following top-level targets,

make html
or
make install-html

does not build libstdc++ doxygen-based API documentation.

The toolchain builds without any issues and i want to build the 
libstdc++ documentation with it. Any pointers ?

warm regards
Saifi.