diff options
| author | Jonathan Wakely <jwakely@redhat.com> | 2022-06-28 09:17:06 +0100 |
|---|---|---|
| committer | Jonathan Wakely <jwakely@redhat.com> | 2022-07-21 09:57:25 +0100 |
| commit | c19fe8ad4e2816b181e5d5d3757f1ad59c86cdca (patch) | |
| tree | 68e1dc4d5077e02a874e8e4b1b0d7d506f69727b | |
| parent | 145ef5e2be28183f2b92b1f81b4d75210b524503 (diff) | |
libstdc++: testsuite: Guard use of C99 std::log2
This prevents the test from failing if the only thing not supported is
the text printed to the log about the size of the floating-point type.
libstdc++-v3/ChangeLog:
* testsuite/20_util/from_chars/4.cc: Only use log2 if C99 math
functions are available.
(cherry picked from commit 30aea28bd30027e0a6be8e3077828256779954b3)
| -rw-r--r-- | libstdc++-v3/testsuite/20_util/from_chars/4.cc | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libstdc++-v3/testsuite/20_util/from_chars/4.cc b/libstdc++-v3/testsuite/20_util/from_chars/4.cc index dcd9f97c946..c27df4ffa5e 100644 --- a/libstdc++-v3/testsuite/20_util/from_chars/4.cc +++ b/libstdc++-v3/testsuite/20_util/from_chars/4.cc @@ -300,9 +300,11 @@ test_max_mantissa() if (Float_limits::is_iec559 && Float_limits::digits < UInt_limits::digits) { +#ifdef _GLIBCXX_USE_C99_MATH_TR1 std::printf("Testing %d-bit float, using %zu-bit integer\n", Float_limits::digits + (int)std::log2(Float_limits::max_exponent) + 1, sizeof(UIntT) * __CHAR_BIT__); +#endif std::from_chars_result res; FloatT flt; |