5 The libc can used in two different modes:
7 #. The **overlay** mode: In this mode, the link order semantics are exploited
8 to overlay implementations from LLVM's libc over the system libc. See
9 :ref:`overlay_mode` for more information about this mode.
10 #. The **fullbuild** mode: In this mode, LLVM's libc is used as the only libc
11 for the binary. See :ref:`fullbuild_mode` for information about this mode.