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-rw-r--r--lib/rbconfig/obsolete.rb5
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/rbconfig/obsolete.rb b/lib/rbconfig/obsolete.rb
index fcc7151ad2..eae9155af6 100644
--- a/lib/rbconfig/obsolete.rb
+++ b/lib/rbconfig/obsolete.rb
@@ -1,2 +1,5 @@
-warn "Use RbConfig instead of obsolete and deprecated Config."
+loc = caller[0]
+loc = loc[/\A.*:\d+:/] if loc
+loc = "#{loc} " if loc
+warn "#{loc}Use RbConfig instead of obsolete and deprecated Config."
Config = RbConfig # compatibility for ruby-1.8.4 and older.