make invocation (slightly more) POSIX compatible

[valarauca]

${@:0} isn't POSIX but only available in bash/zsh compatible shells. Amusingly one of which is GNU-sh, on some linux distros the invocation doesn't work.

If would be better to use "$0"

[GSheaf]

The problem with a plain $0 is that this doesn't support passing other flags (such as linker flags) to the source file.

[ListeriaM]

replacing "${@:0}" with "$0" "$@" should work

[valarauca]

When I opened this I didn't realize it was doing sub-slicing, not just taking an argument,