diff options
Diffstat (limited to 'libstdc++-v3')
| -rw-r--r-- | libstdc++-v3/testsuite/20_util/to_chars/long_double.cc | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/libstdc++-v3/testsuite/20_util/to_chars/long_double.cc b/libstdc++-v3/testsuite/20_util/to_chars/long_double.cc index 5c1f7136f21..22d42067d65 100644 --- a/libstdc++-v3/testsuite/20_util/to_chars/long_double.cc +++ b/libstdc++-v3/testsuite/20_util/to_chars/long_double.cc @@ -17,7 +17,23 @@ // <charconv> is supported in C++14 as a GNU extension, but this test uses C++17 // hexadecimal floating-point literals. -// { dg-do run { target c++17 } } + +// When long double is larger than double, the long double to_chars overloads +// are partially implemented in terms of printf, so this test in turn uses +// printf to verify correctness these overloads. +// When long double == double, the long double to_chars overloads are simple +// wrappers around the corresponding double overloads. Since they don't go +// through printf, we can't portably verify their output by comparing it with +// that of printf, so it's simplest to just not run this test on such targets; +// correctness of these overloads is already implied by that of the double +// overloads. +// { dg-do run { target { c++17 && large_long_double } } } +// { dg-do compile { target { c++17 && { ! large_long_double } } } } + +// The system printf on these targets appear to be buggy. FIXME: Make this test +// more portable and robust to differences in system printf behavior. +// { dg-xfail-run-if "Non-conforming printf (see PR98384)" { *-*-solaris* *-*-darwin* } } + // { dg-require-effective-target ieee-floats } #include <charconv> |