>>>>> On Mon, 07 Jan 2019, Georgy Yakovlev wrote:

>  cargo_src_compile() {
>  	debug-print-function ${FUNCNAME} "$@"
>  
>  	export CARGO_HOME="${ECARGO_HOME}"
>  
> -	cargo build -j $(makeopts_jobs) $(usex debug "" --release) \
> +	cargo build -j $(makeopts_jobs) $(usex debug "" --release) "${@}" \

Keep constistent style, "$@" is without braces just above.

>  cargo_src_install() {
>  	debug-print-function ${FUNCNAME} "$@"
> 
> -	cargo install -j $(makeopts_jobs) --root="${D}/usr" $(usex debug --debug "") \
> +	cargo install -j $(makeopts_jobs) --root="${D}/usr" $(usex debug --debug "") "${@}" \

Ditto.

Ulrich