Update for faerie section symbols

Author: bjorn3

config.sh

@@ -20,4 +20,4 @@ fi
 
 export RUSTFLAGS='-Zalways-encode-mir -Cpanic=abort -Cdebuginfo=2 -Zcodegen-backend='$(pwd)'/target/'$channel'/librustc_codegen_cranelift.'$dylib_ext' --sysroot '$(pwd)'/build_sysroot/sysroot'
 RUSTC="rustc $RUSTFLAGS -L crate=target/out --out-dir target/out"
-export RUST_LOG=warn # display metadata load errors
+export RUSTC_LOG=warn # display metadata load errors

src/metadata.rs

@@ -90,7 +90,12 @@ pub fn write_metadata<'a, 'gcx>(
     DeflateEncoder::new(&mut compressed, Compression::fast())
         .write_all(&metadata.raw_data).unwrap();
 
-    artifact.declare_with(".rustc", faerie::Decl::section(faerie::SectionKind::Data), compressed).unwrap();
+    artifact.declare(".rustc", faerie::Decl::section(faerie::SectionKind::Data)).unwrap();
+    artifact.define_with_symbols(".rustc", compressed, {
+        let mut map = std::collections::BTreeMap::new();
+        map.insert(rustc::middle::exported_symbols::metadata_symbol_name(tcx), 0);
+        map
+    }).unwrap();
 
     metadata
 }