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-rw-r--r--ext/bigdecimal/extconf.rb3
1 files changed, 3 insertions, 0 deletions
diff --git a/ext/bigdecimal/extconf.rb b/ext/bigdecimal/extconf.rb
index 92f3b00d6c..d6be3e584e 100644
--- a/ext/bigdecimal/extconf.rb
+++ b/ext/bigdecimal/extconf.rb
@@ -1,3 +1,6 @@
require 'mkmf'
+have_func("labs", "stdlib.h")
+have_func("llabs", "stdlib.h")
+
create_makefile('bigdecimal')