fix enzyme library used for build (#150)

* fix enzyme library used for build

Author: tgymnich

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

@@ -1648,12 +1648,12 @@ impl Step for Assemble {
         };
 
         if let Some(enzyme_install) = enzyme_install {
-            let src_lib = enzyme_install.join("build/Enzyme/LLVMEnzyme-17.so");
+            let src_lib = enzyme_install.join("build/Enzyme/libEnzyme-17.so");
 
             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("libLLVMEnzyme-17.so");
-            let target_dst_lib = target_libdir.join("libLLVMEnzyme-17.so");
+            let dst_lib = libdir.join("libEnzyme-17.so");
+            let target_dst_lib = target_libdir.join("libEnzyme-17.so");
             builder.copy(&src_lib, &dst_lib);
             builder.copy(&src_lib, &target_dst_lib);
         }

src/bootstrap/src/core/build_steps/llvm.rs

@@ -894,7 +894,7 @@ impl Step for Enzyme {
             .profile(profile)
             .env("LLVM_CONFIG_REAL", &llvm_config)
             .define("LLVM_ENABLE_ASSERTIONS", "ON")
-            .define("ENZYME_EXTERNAL_SHARED_LIB", "OFF")
+            .define("ENZYME_EXTERNAL_SHARED_LIB", "ON")
             .define("LLVM_DIR", &llvm_cmake_dir);
 
         cfg.build();

src/bootstrap/src/core/builder.rs

@@ -1419,7 +1419,7 @@ impl<'a> Builder<'a> {
         // https://rust-lang.zulipchat.com/#narrow/stream/182449-t-compiler.2Fhelp/topic/.E2.9C.94.20link.20new.20library.20into.20stage1.2Frustc
         if self.config.llvm_enzyme {
             rustflags.arg("-l");
-            rustflags.arg("LLVMEnzyme-17");
+            rustflags.arg("Enzyme-17");
         }
 
         let use_new_symbol_mangling = match self.config.rust_new_symbol_mangling {