58 lines
1.6 KiB
Rust
58 lines
1.6 KiB
Rust
fn main() {
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let mut builder = cc::Build::new();
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if !builder.get_compiler().is_like_clang() {
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// if the default/configured cc is not clang, try to call clang manually
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builder.compiler("clang");
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}
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builder.warnings_into_errors(true);
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builder.flag("-flto=thin");
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build_ll(builder.clone());
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build_c(builder);
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}
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fn build_ll(mut builder: cc::Build) {
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// the ll files are written bare, let the compiler override module annotations and don't warn
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// about it
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builder.flag("-Wno-override-module");
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builder.file("src/poison/freeze.ll").compile("freeze");
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}
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fn build_c(mut builder: cc::Build) {
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builder.opt_level(3);
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// TODO control flags with generics
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builder.flag("-fassociative-math");
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builder.flag("-freciprocal-math");
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builder.flag("-fno-signed-zeros");
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builder.flag("-fno-trapping-math");
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builder.flag("-ffp-contract=fast");
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// -fapprox-func isn't currently available in the driver, but it is in clang itself
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// https://reviews.llvm.org/D106191
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builder.flag("-Xclang").flag("-fapprox-func");
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builder.flag("-fno-math-errno");
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// poison_unsafe must be compiled without finite-math-only
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// see its docs for details
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poison_unsafe(builder.clone());
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builder.flag("-ffinite-math-only");
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poison_safe(builder);
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}
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fn poison_unsafe(mut builder: cc::Build) {
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builder
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.file("src/math/poison_unsafe.c")
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.compile("poison_unsafe")
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}
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fn poison_safe(mut builder: cc::Build) {
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builder
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.file("src/math/poison_safe.c")
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.compile("poison_safe")
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}
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