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| author | Jonathan Wakely <jwakely@redhat.com> | 2023-06-09 11:08:03 +0100 |
|---|---|---|
| committer | Jonathan Wakely <jwakely@redhat.com> | 2023-06-09 13:15:39 +0100 |
| commit | 00da6bcfccbc5ab13821d8dd7334dd48c22d5702 (patch) | |
| tree | 4a091bcd716dc8f548a073cdea2a30f5fbe234bc | |
| parent | 793ed718b522b15e2d758eca953feeec1979fe2c (diff) | |
| download | gcc-00da6bcfccbc5ab13821d8dd7334dd48c22d5702.zip gcc-00da6bcfccbc5ab13821d8dd7334dd48c22d5702.tar.gz gcc-00da6bcfccbc5ab13821d8dd7334dd48c22d5702.tar.bz2 | |
libstdc++: Remove duplicate definition of _Float128 std::from_chars [PR110077]
When long double uses IEEE binary128 representation we define the
_Float128 overload of std::from_chars inline in <charconv>. My changes
in r14-1431-g7037e7b6e4ac41 cause it to also be defined non-inline in
the library, leading to an abi-check failure for (at least) sparc and
aarch64.
Suppress the definition in the library if long double and _Float128 have
are both IEEE binary128.
libstdc++-v3/ChangeLog:
PR libstdc++/110077
* src/c++17/floating_from_chars.cc (from_chars) <_Float128>:
Only define if _Float128 and long double have different
representations.
| -rw-r--r-- | libstdc++-v3/src/c++17/floating_from_chars.cc | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/libstdc++-v3/src/c++17/floating_from_chars.cc b/libstdc++-v3/src/c++17/floating_from_chars.cc index f1dd1037..3152d64 100644 --- a/libstdc++-v3/src/c++17/floating_from_chars.cc +++ b/libstdc++-v3/src/c++17/floating_from_chars.cc @@ -1325,7 +1325,8 @@ _ZSt10from_charsPKcS0_RDF128_St12chars_format(const char* first, __ieee128& value, chars_format fmt) noexcept __attribute__((alias ("_ZSt10from_charsPKcS0_Ru9__ieee128St12chars_format"))); -#elif defined(__FLT128_MANT_DIG__) +#elif __FLT128_MANT_DIG__ == 113 && __LDBL_MANT_DIG__ != 113 +// Overload for _Float128 is not defined inline in <charconv>, define it here. from_chars_result from_chars(const char* first, const char* last, _Float128& value, chars_format fmt) noexcept |