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Move crt-static and linking to build script on windows #1227

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Move crt-static and linking to build script on windows #1227

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1c197cf
Move crt-static and linking to build script on windows
CarePackage17 Jan 21, 2019
5f9a696
Use env vars instead of cfg! for detection
CarePackage17 Jan 25, 2019
9b14096
Check for rustc-dep-of-std feature
CarePackage17 Feb 18, 2019
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19 changes: 19 additions & 0 deletions build.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,25 @@ fn main() {
if rustc_minor_version().expect("Failed to get rustc version") >= 30 {
println!("cargo:rustc-cfg=core_cvoid");
}

let dep_of_std = env::var("CARGO_FEATURE_RUSTC_DEP_OF_STD");

// Windows-specific:
// When this crate is not built as part of std, we explicitly
// need to tell the compiler to link the CRT. This enables
// usage in no_std scenarios.
if dep_of_std.is_err() {
let target = env::var("TARGET").unwrap();
let linkage = env::var("CARGO_CFG_TARGET_FEATURE").unwrap();

if target.contains("msvc") {
if linkage.contains("crt-static") {
println!("cargo:rustc-link-lib=dylib=libcmt");
} else {
println!("cargo:rustc-link-lib=dylib=msvcrt");
}
}
}
}

fn rustc_minor_version() -> Option<u32> {
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