Add support for testing v3 in CI

Author: gschulze

libmimalloc-sys/src/extended.rs

@@ -542,11 +542,15 @@ pub const mi_option_max_errors: mi_option_t = 19;
 /// Option (experimental)
 pub const mi_option_max_warnings: mi_option_t = 20;
 
+#[cfg(not(feature = "v3"))]
 /// Option (experimental)
 pub const mi_option_max_segment_reclaim: mi_option_t = 21;
 
 /// Last option.
+#[cfg(not(feature = "v3"))]
 pub const _mi_option_last: mi_option_t = 37;
+#[cfg(feature = "v3")]
+pub const _mi_option_last: mi_option_t = 43;
 
 extern "C" {
     // Note: mi_option_{enable,disable} aren't exposed because they're redundant

libmimalloc-sys/sys-test/Cargo.toml

@@ -13,3 +13,6 @@ libc = "0.2"
 
 [build-dependencies]
 ctest2 = "0.4"
+
+[features]
+v3 = ["libmimalloc-sys/v3"]

libmimalloc-sys/sys-test/build.rs

@@ -14,6 +14,7 @@ fn main() {
             "{cargo_manifest_dir}/../c_src/mimalloc/{version}/include"
         ))
         .cfg("feature", Some("extended"))
+        .cfg("feature", (version == "v3").then(|| "v3"))
         .fn_cname(|rust, link_name| link_name.unwrap_or(rust).to_string())
         // ignore whether or not the option enum is signed.
         .skip_signededness(|c| c.ends_with("_t") || c.ends_with("_e"))