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* [Bug libstdc++/114742] New: invalid use of '__ieee128' in <ext/numeric_traits.h> and <format>
@ 2024-04-16 13:16 mkretz at gcc dot gnu.org
2024-04-16 13:19 ` [Bug libstdc++/114742] " redi at gcc dot gnu.org
2024-04-16 13:22 ` redi at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: mkretz at gcc dot gnu.org @ 2024-04-16 13:16 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114742
Bug ID: 114742
Summary: invalid use of '__ieee128' in <ext/numeric_traits.h>
and <format>
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: mkretz at gcc dot gnu.org
Target Milestone: ---
https://compiler-explorer.com/z/K3GYY7Msc
Testcase:
#include <bit>
#include <format>
Compile on power64le with -O2 -std=c++23 -mcpu=power6 and optionally with
-mlong-double-64
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug libstdc++/114742] invalid use of '__ieee128' in <ext/numeric_traits.h> and <format>
2024-04-16 13:16 [Bug libstdc++/114742] New: invalid use of '__ieee128' in <ext/numeric_traits.h> and <format> mkretz at gcc dot gnu.org
@ 2024-04-16 13:19 ` redi at gcc dot gnu.org
2024-04-16 13:22 ` redi at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: redi at gcc dot gnu.org @ 2024-04-16 13:19 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114742
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2024-04-16
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think we need something like this in <bits/c++config.h>
#ifndef __VSX__
# undef _GLIBCXX_LONG_DOUBLE_ALT128_COMPAT
#endif
Otherwise we might set the ALT128_COMPAT macro during configure, but then it
becomes invalidated during compilation of user code if they "downgrade" to
something that doesn't support ieee128, using -mcpu=power6 and/or
-mlong-double-64
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug libstdc++/114742] invalid use of '__ieee128' in <ext/numeric_traits.h> and <format>
2024-04-16 13:16 [Bug libstdc++/114742] New: invalid use of '__ieee128' in <ext/numeric_traits.h> and <format> mkretz at gcc dot gnu.org
2024-04-16 13:19 ` [Bug libstdc++/114742] " redi at gcc dot gnu.org
@ 2024-04-16 13:22 ` redi at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: redi at gcc dot gnu.org @ 2024-04-16 13:22 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114742
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Mathias noted that still fails with -mcpu=power7
Checking for _ARCH_PWR8 or __POWER8_VECTOR__ instead works.
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2024-04-16 13:22 UTC | newest]
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2024-04-16 13:16 [Bug libstdc++/114742] New: invalid use of '__ieee128' in <ext/numeric_traits.h> and <format> mkretz at gcc dot gnu.org
2024-04-16 13:19 ` [Bug libstdc++/114742] " redi at gcc dot gnu.org
2024-04-16 13:22 ` redi at gcc dot gnu.org
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