2017-04-20 Edward Smith-Rowland <3dw4rd@verizon.net> PR libstdc++/68397 std::tr1::expint fails ... long double arguments. * include/tr1/exp_integral.tcc: Increase iteration limits. * testsuite/tr1/5_numerical_facilities/special_functions/15_expint/ pr68397.cc: New test. * testsuite/special_functions/14_expint/pr68397.cc: New test. From-SVN: r247027