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-rw-r--r--rand/build.rs14
1 files changed, 14 insertions, 0 deletions
diff --git a/rand/build.rs b/rand/build.rs
new file mode 100644
index 0000000..e44b643
--- /dev/null
+++ b/rand/build.rs
@@ -0,0 +1,14 @@
+extern crate rustc_version;
+use rustc_version::{version, Version};
+
+fn main() {
+ if version().unwrap() >= Version::parse("1.25.0").unwrap() {
+ println!("cargo:rustc-cfg=rust_1_25");
+ }
+ if version().unwrap() >= Version::parse("1.26.0").unwrap() {
+ println!("cargo:rustc-cfg=rust_1_26");
+ }
+ if version().unwrap() >= Version::parse("1.27.0").unwrap() {
+ println!("cargo:rustc-cfg=rust_1_27");
+ }
+}