Use CrateDepKind::Explicit for the profiler runtime

It is unconditionally included.

Author: bjorn3

compiler/rustc_codegen_ssa/src/back/link.rs

@@ -2792,11 +2792,9 @@ fn add_upstream_rust_crates(
         // We must always link crates `compiler_builtins` and `profiler_builtins` statically.
         // Even if they were already included into a dylib
         // (e.g. `libstd` when `-C prefer-dynamic` is used).
-        // FIXME: `dependency_formats` can report `profiler_builtins` as `NotLinked` for some
-        // reason, it shouldn't do that because `profiler_builtins` should indeed be linked.
         let linkage = data[cnum];
         let link_static_crate = linkage == Linkage::Static
-            || (linkage == Linkage::IncludedFromDylib || linkage == Linkage::NotLinked)
+            || linkage == Linkage::IncludedFromDylib
                 && (codegen_results.crate_info.compiler_builtins == Some(cnum)
                     || codegen_results.crate_info.profiler_runtime == Some(cnum));
 

compiler/rustc_metadata/src/creader.rs

@@ -985,6 +985,8 @@ impl CStore {
         };
         info!("panic runtime not found -- loading {}", name);
 
+        // This has to be implicit as both panic_unwind and panic_abort may be present in the crate
+        // graph at the same time. One of them will later be activated in dependency_formats.
         let Some(cnum) =
             self.resolve_crate(tcx, name, DUMMY_SP, CrateDepKind::Implicit, CrateOrigin::Injected)
         else {
@@ -1016,7 +1018,7 @@ impl CStore {
 
         let name = Symbol::intern(&tcx.sess.opts.unstable_opts.profiler_runtime);
         let Some(cnum) =
-            self.resolve_crate(tcx, name, DUMMY_SP, CrateDepKind::Implicit, CrateOrigin::Injected)
+            self.resolve_crate(tcx, name, DUMMY_SP, CrateDepKind::Explicit, CrateOrigin::Injected)
         else {
             return;
         };