5.7.10.4 Nodefaultlibs Option

The -nodefaultlibs option will prevent the standard system libraries being linked into the project. Only the libraries you specify are passed to the linker.

The compiler may generate calls to memcmp, memset and memcpy, even when this option is specified. As these symbols are usually resolved by entries in the standard compiler libraries, they should be supplied through some other mechanism when this option is specified.