(encore) Builder: use LazyLogging.logger.warn to print elaboration message (#1670)

* Builder: use LazyLogging.logger.warn to print elaboration message

* add deprecation for chisel3.internal.ErrorLog.info.

* add test to check elaboration message still exist.

Co-authored-by: Kevin Laeufer <kevin.laeufer@sifive.com>

2 files changed, 5 insertions, 3 deletions

diff --git a/core/src/main/scala/chisel3/internal/Builder.scala b/core/src/main/scala/chisel3/internal/Builder.scala
index d665b7bc..1c3a0005 100644
--- a/core/src/main/scala/chisel3/internal/Builder.scala
+++ b/core/src/main/scala/chisel3/internal/Builder.scala
@@ -10,6 +10,7 @@ import chisel3.internal.firrtl._
 import chisel3.internal.naming._
 import _root_.firrtl.annotations.{CircuitName, ComponentName, IsMember, ModuleName, Named, ReferenceTarget}
 import chisel3.internal.Builder.Prefix
+import logger.LazyLogging
 
 import scala.collection.mutable
 
@@ -324,7 +325,7 @@ private[chisel3] class DynamicContext() {
   val namingStack = new NamingStack
 }
 
-private[chisel3] object Builder {
+private[chisel3] object Builder extends LazyLogging {
 
   // Represents the current state of the prefixes given
   type Prefix = List[String]
@@ -638,11 +639,11 @@ private[chisel3] object Builder {
   private [chisel3] def build[T <: RawModule](f: => T, dynamicContext: DynamicContext): (Circuit, T) = {
     dynamicContextVar.withValue(Some(dynamicContext)) {
       checkScalaVersion()
-      errors.info("Elaborating design...")
+      logger.warn("Elaborating design...")
       val mod = f
       mod.forceName(None, mod.name, globalNamespace)
       errors.checkpoint()
-      errors.info("Done elaborating.")
+      logger.warn("Done elaborating.")
 
       (Circuit(components.last.name, components, annotations), mod)
     }
diff --git a/core/src/main/scala/chisel3/internal/Error.scala b/core/src/main/scala/chisel3/internal/Error.scala
index bf0b9d20..6a1794ce 100644
--- a/core/src/main/scala/chisel3/internal/Error.scala
+++ b/core/src/main/scala/chisel3/internal/Error.scala
@@ -102,6 +102,7 @@ private[chisel3] class ErrorLog {
     errors += new Warning(m, getUserLineNumber)
 
   /** Emit an informational message */
+  @deprecated("This method will be removed in 3.5", "3.4")
   def info(m: String): Unit =
     println(new Info("[%2.3f] %s".format(elapsedTime/1e3, m), None))