In external mode, cmd/link does not process any host object files, in
particular foo.cgo2.o. It links together the gc-generated object
files, along with any other Go code, into a go.o file. While doing
that, cmd/link will discover that there is no definition for
_cgo_gcc_Cfunc_sin, referred to by the gc-compiled source file. This
is okay, because cmd/link also processes the cgo_import_static directive and

it is impossible to change the contents of a string.
The predeclared string type is <code>string</code>;
it is a <a href="#Type_definitions">defined type</a>.
</p>

<p>
The length of a string <code>s</code> can be discovered using
the built-in function <a href="#Length_and_capacity"><code>len</code></a>.
The length is a compile-time constant if the string is a constant.

## Known Bugs

*   Using XLA:GPU with CUDA 9 and CUDA 9.1 results in garbage results and/or
    `CUDA_ILLEGAL_ADDRESS` failures.

    Google discovered in mid-December 2017 that the PTX-to-SASS compiler in CUDA
    9 and CUDA 9.1 sometimes does not properly compute the carry bit when
    decomposing 64-bit address calculations with large offsets (e.g. `load [x +