LINK: return occasionally deleted in 7d111c4d extracting debug info on MacOS.

This code generates .dSYM folder containing debug info in dwarf format, it is place where debuger lookup symbols  and type declarations.

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/LinkStage.kt

@@ -69,6 +69,7 @@ internal open class MacOSBasedPlatform(distribution: Distribution)
     : PlatformFlags(distribution) {
 
     override val linker = "${distribution.sysRoot}/usr/bin/ld"
+    private val dsymutil = "${distribution.llvmBin}/llvm-dsymutil"
 
     open val osVersionMin = listOf(
         propertyTargetString("osVersionMinFlagLd"),
@@ -90,6 +91,14 @@ internal open class MacOSBasedPlatform(distribution: Distribution)
             linkerKonanFlags +
             listOf("-lSystem")
     }
+
+    open fun dsymutilCommand(executable: ExecutableFile): List<String> {
+        return listOf(dsymutil, executable)
+    }
+
+    open fun dsymutilDryRunVerboseCommand(executable: ExecutableFile): List<String> {
+        return listOf(dsymutil, "-dump-debug-map" ,executable)
+    }
 }
 
 internal open class LinuxBasedPlatform(distribution: Distribution)
@@ -222,6 +231,11 @@ internal class LinkStage(val context: Context) {
                 entryPointSelector
 
         runTool(*linkCommand.toTypedArray())
+        if (platform is MacOSBasedPlatform && context.shouldContainDebugInfo()) {
+            if (context.phase?.verbose ?: false)
+                runTool(*platform.dsymutilDryRunVerboseCommand(executable).toTypedArray())
+            runTool(*platform.dsymutilCommand(executable).toTypedArray())
+        }
 
         return executable
     }