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-rw-r--r--ext/mathn/rational/extconf.rb5
1 files changed, 5 insertions, 0 deletions
diff --git a/ext/mathn/rational/extconf.rb b/ext/mathn/rational/extconf.rb
new file mode 100644
index 0000000000..23cff7a325
--- /dev/null
+++ b/ext/mathn/rational/extconf.rb
@@ -0,0 +1,5 @@
+require "mkmf"
+
+$CPPFLAGS = "-DEXT_MATHN -DCANON -DCLCANON"
+
+create_makefile "mathn/rational"