further fixes for macos (#153)

Author: ZuseZ4

src/bootstrap/src/core/build_steps/compile.rs

@@ -1648,12 +1648,18 @@ impl Step for Assemble {
         };
 
         if let Some(enzyme_install) = enzyme_install {
-            let src_lib = enzyme_install.join("build/Enzyme/libEnzyme-17.so");
+            let lib_ext = match env::consts::OS {
+                "macos" => "dylib",
+                "windows" => "dll",
+                _ => "so",
+            };
+
+            let src_lib = enzyme_install.join("build/Enzyme/libEnzyme-17").with_extension(lib_ext);
 
             let libdir = builder.sysroot_libdir(build_compiler, build_compiler.host);
             let target_libdir = builder.sysroot_libdir(target_compiler, target_compiler.host);
-            let dst_lib = libdir.join("libEnzyme-17.so");
-            let target_dst_lib = target_libdir.join("libEnzyme-17.so");
+            let dst_lib = libdir.join("libEnzyme-17").with_extension(lib_ext);
+            let target_dst_lib = target_libdir.join("libEnzyme-17").with_extension(lib_ext);
             builder.copy(&src_lib, &dst_lib);
             builder.copy(&src_lib, &target_dst_lib);
         }
@@ -1665,9 +1671,10 @@ impl Step for Assemble {
         // when not performing a full bootstrap).
         builder.ensure(Rustc::new(build_compiler, target_compiler.host));
 
-        // FIXME: For now patch over problems noted in #90244 by early returning here, even though
-        // we've not properly assembled the target sysroot. A full fix is pending further investigation,
-        // for now full bootstrap usage is rare enough that this is OK.
+        // FIXME: For now patch over problems noted in #90244 by early returning
+        // here, even though we've not properly assembled the target sysroot. A
+        // full fix is pending further investigation, for now full bootstrap
+        // usage is rare enough that this is OK.
         if target_compiler.stage >= 3 && !builder.config.full_bootstrap {
             return target_compiler;
         }
@@ -1686,9 +1693,8 @@ impl Step for Assemble {
 
         let lld_install = if builder.config.lld_enabled {
             Some(builder.ensure(llvm::Lld { target: target_compiler.host }))
-        } else {
-            None
-        };
+        }
+        else {None};
 
         let stage = target_compiler.stage;
         let host = target_compiler.host;