Link extra libraries when using mcount on *-windows-gnu targets

libgmon needs to be linked. This also requires readding a few
other system libraries to satisfy its dependencies.

Author: pmur

compiler/rustc_codegen_ssa/src/back/linker.rs

@@ -737,6 +737,13 @@ impl<'a> Linker for GccLinker<'a> {
         // This flag is also used when linking to choose target specific
         // libraries needed to enable profiling.
         self.cc_arg("-pg");
+        // On windows-gnu targets, libgmon also needs to be linked, and this
+        // requires readding libraries to satisfy its dependencies.
+        if self.sess.target.is_like_windows {
+            self.cc_arg("-lgmon");
+            self.cc_arg("-lkernel32");
+            self.cc_arg("-lmsvcrt");
+        }
     }
 
     fn control_flow_guard(&mut self) {}