| use std::env; |
| |
| fn main() { |
| let ac = autocfg::new(); |
| |
| ac.emit_expression_cfg( |
| "unsafe { 1f64.to_int_unchecked::<i32>() }", |
| "has_to_int_unchecked", |
| ); |
| |
| ac.emit_expression_cfg("1u32.reverse_bits()", "has_reverse_bits"); |
| ac.emit_expression_cfg("1u32.trailing_ones()", "has_leading_trailing_ones"); |
| ac.emit_expression_cfg("1u32.div_euclid(1u32)", "has_div_euclid"); |
| |
| if env::var_os("CARGO_FEATURE_STD").is_some() { |
| ac.emit_expression_cfg("1f64.copysign(-1f64)", "has_copysign"); |
| } |
| ac.emit_expression_cfg("1f64.is_subnormal()", "has_is_subnormal"); |
| |
| ac.emit_expression_cfg("1u32.to_ne_bytes()", "has_int_to_from_bytes"); |
| ac.emit_expression_cfg("3.14f64.to_ne_bytes()", "has_float_to_from_bytes"); |
| |
| autocfg::rerun_path("build.rs"); |
| } |