1.. _fullbuild_mode: 2 3============== 4Fullbuild Mode 5============== 6 7.. note:: 8 Fullbuild requires running headergen, which is a python program that depends on 9 pyyaml. The minimum versions are listed on the :ref:`header_generation` 10 page, as well as additional information. 11 12The *fullbuild* mode of LLVM's libc is the mode in which it is to be used as 13the only libc (as opposed to the :ref:`overlay_mode` in which it is used along 14with the system libc.) In order to use it as the only libc, one will have to 15build and install not only the static archives like ``libc.a`` from LLVM's libc, 16but also the start-up objects like ``crt1.o`` and the public headers. 17 18The full libc build can be of two types: 19 20.. toctree:: 21 :maxdepth: 1 22 23 full_host_build 24 full_cross_build 25