The instruction_set
attribute was malformed.
Erroneous code example:
#![feature(isa_attribute)] #[instruction_set()] // error: expected one argument pub fn something() {} fn main() {}
The parenthesized instruction_set
attribute requires the parameter to be specified:
#![feature(isa_attribute)] #[cfg_attr(target_arch="arm", instruction_set(arm::a32))] fn something() {}
or:
#![feature(isa_attribute)] #[cfg_attr(target_arch="arm", instruction_set(arm::t32))] fn something() {}
For more information see the instruction_set
attribute section of the Reference.