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-rw-r--r--lib/mkmf.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index 7ae23490462..9b01d67c4c6 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -8,6 +8,7 @@ CONFIG = Config::MAKEFILE_CONFIG
ORIG_LIBPATH = ENV['LIB']
SRC_EXT = ["c", "cc", "m", "cxx", "cpp", "C"]
+$static = $config_h = nil
unless defined? $configure_args
$configure_args = {}