libutil: remove warnOnce macro

it's only used once, and even that one use is highly questionable. more
instances of warnOnce should be much more principled than this has been

Change-Id: I5856570c99cb44462e700d753d0c706a5db03c4b

1 files changed, 7 insertions, 3 deletions

diff --git a/src/libmain/shared.cc b/src/libmain/shared.cc
index af7f46d87..a407c647f 100644
--- a/src/libmain/shared.cc
+++ b/src/libmain/shared.cc
@@ -33,9 +33,13 @@ void printGCWarning()
 {
     if (!gcWarning) return;
     static bool haveWarned = false;
-    warnOnce(haveWarned,
-        "you did not specify '--add-root'; "
-        "the result might be removed by the garbage collector");
+    if (!haveWarned) {
+        haveWarned = true;
+        warn(
+            "you did not specify '--add-root'; "
+            "the result might be removed by the garbage collector"
+        );
+    }
 }