Revert "mkmf.rb: try linking at try_var" [Bug #18235]
This reverts commit 524513be399e81bb170ec88aa0d501f33cbde8c3, which can return false positive by existing but unusable symbol, including functions.
Revert "mkmf.rb: try linking at try_var" [Bug #18235]
This reverts commit 524513be399e81bb170ec88aa0d501f33cbde8c3,
which can return false positive by existing but unusable symbol,
including functions.