Usage Modes

The libc can used in two different modes:

1. The overlay mode: In this mode, the link order semantics are exploited to overlay implementations from LLVM’s libc over the system libc. See Overlay Mode for more information about this mode.
2. The fullbuild mode: In this mode, LLVM’s libc is used as the only libc for the binary. See Fullbuild Mode for information about this mode.