tcng provides a library called tccext that provides functions to parse the output generated by tcc, and to store the result in C structures which can easily be accessed in programs.
The library is normally installed as /usr/lib/tcng/lib/libtccext.a(tcng/lib/tcng/lib/libtccext.a if using a local copy).
The data structures and functions provided by this library are described in the accompanying header file tccext.h, which is installed in /usr/lib/tcng/include/tccext.h (tcng/tcc/ext/tccext.h if using a local copy).