If the -xbuiltin option is not specified, then the compiler assumes -xbuiltin=%none.
If only -xbuiltin is specified, then the compiler assumes -xbuiltin=%all.
The expansion of the macro -fast includes -xbuiltin=%all.
The following compiler command requests special handling of the standard library calls.
example% CC -xbuiltin -c foo.cc |
The following compiler command request that there be no special handling of the standard library calls. Note that the expansion of the macro -fast includes -xbuiltin=%all.
example% CC -fast -xbuiltin=%none -c foo.cc |