25 lines
799 B
Rust
25 lines
799 B
Rust
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");
|
|
}
|