2 files changed, 10 insertions, 0 deletions
diff --git a/chiselFrontend/src/main/scala/chisel3/internal/Builder.scala b/chiselFrontend/src/main/scala/chisel3/internal/Builder.scala
index 8d376810..12cc840e 100644
--- a/chiselFrontend/src/main/scala/chisel3/internal/Builder.scala
+++ b/chiselFrontend/src/main/scala/chisel3/internal/Builder.scala
@@ -173,6 +173,8 @@ private[chisel3] object Builder {
 
   def errors: ErrorLog = dynamicContext.errors
   def error(m: => String): Unit = errors.error(m)
+  def warning(m: => String): Unit = errors.warning(m)
+  def deprecated(m: => String): Unit = errors.deprecated(m)
 
   def build[T <: Module](f: => T): Circuit = {
     dynamicContextVar.withValue(Some(new DynamicContext())) {
diff --git a/chiselFrontend/src/main/scala/chisel3/internal/Error.scala b/chiselFrontend/src/main/scala/chisel3/internal/Error.scala
index 7ae0580f..c5c67da4 100644
--- a/chiselFrontend/src/main/scala/chisel3/internal/Error.scala
+++ b/chiselFrontend/src/main/scala/chisel3/internal/Error.scala
@@ -25,6 +25,10 @@ private[chisel3] class ErrorLog {
   def warning(m: => String): Unit =
     errors += new Warning(m, getUserLineNumber)
 
+  /** Log a deprecation warning message */
+  def deprecated(m: => String): Unit =
+    errors += new DeprecationWarning(m, getUserLineNumber)
+
   /** Emit an informational message */
   def info(m: String): Unit =
     println(new Info("[%2.3f] %s".format(elapsedTime/1e3, m), None))  // scalastyle:ignore regex
@@ -86,6 +90,10 @@ private class Warning(msg: => String, line: Option[StackTraceElement]) extends L
   def format: String = tag("warn", Console.YELLOW)
 }
 
+private class DeprecationWarning(msg: => String, line: Option[StackTraceElement]) extends LogEntry(msg, line) {
+  def format: String = tag("warn", Console.CYAN)
+}
+
 private class Info(msg: => String, line: Option[StackTraceElement]) extends LogEntry(msg, line) {
   def format: String = tag("info", Console.MAGENTA)
 }