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* [Bug c++/106023] New: Would like to control the ELF visibility of template explicit instantiations
@ 2022-06-18 15:16 thiago at kde dot org
2022-06-18 20:06 ` [Bug c++/106023] " pinskia at gcc dot gnu.org
2022-06-19 16:04 ` thiago at kde dot org
0 siblings, 2 replies; 3+ messages in thread
From: thiago at kde dot org @ 2022-06-18 15:16 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106023
Bug ID: 106023
Summary: Would like to control the ELF visibility of template
explicit instantiations
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: thiago at kde dot org
Target Milestone: ---
Given a template like:
template <typename T> struct __attribute__((visibility("hidden"))) S
{
static constexpr int n = 0;
};
I would like to mark an explicit instantiation (not a specialisation!) with a
different visibility:
template struct __attribute__((visibility("default"))) S<int>;
template __attribute__((visibility("default"))) const int S<unsigned>::n;
Either solution would help me, but the first would be preferable. Both would be
best.
Clang does support both forms properly. Visual Studio supports the former only.
See https://gcc.godbolt.org/z/T7sdzTnbG and note how GCC adds ".hidden" to the
two "::n" symbols and Clang doesn't, while Clang properly refers to those
symbols using @GOTPCREL and GCC doesn't. The MVSC example uses dllimport only
to highlight the difference; it wouldn't be written like this in real code.
Please ensure "protected" visibility also works. See
https://gcc.godbolt.org/z/o3W4x5YsG
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/106023] Would like to control the ELF visibility of template explicit instantiations
2022-06-18 15:16 [Bug c++/106023] New: Would like to control the ELF visibility of template explicit instantiations thiago at kde dot org
@ 2022-06-18 20:06 ` pinskia at gcc dot gnu.org
2022-06-19 16:04 ` thiago at kde dot org
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2022-06-18 20:06 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106023
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Depends on| |77306
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think this is a dup of bug 77306.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77306
[Bug 77306] Unable to specify visibility for explicit template instantiations
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/106023] Would like to control the ELF visibility of template explicit instantiations
2022-06-18 15:16 [Bug c++/106023] New: Would like to control the ELF visibility of template explicit instantiations thiago at kde dot org
2022-06-18 20:06 ` [Bug c++/106023] " pinskia at gcc dot gnu.org
@ 2022-06-19 16:04 ` thiago at kde dot org
1 sibling, 0 replies; 3+ messages in thread
From: thiago at kde dot org @ 2022-06-19 16:04 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106023
Thiago Macieira <thiago at kde dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #2 from Thiago Macieira <thiago at kde dot org> ---
Ah, so it is. Thanks for putting up with my being lazy.
*** This bug has been marked as a duplicate of bug 77306 ***
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2022-06-19 16:04 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2022-06-18 15:16 [Bug c++/106023] New: Would like to control the ELF visibility of template explicit instantiations thiago at kde dot org
2022-06-18 20:06 ` [Bug c++/106023] " pinskia at gcc dot gnu.org
2022-06-19 16:04 ` thiago at kde dot org
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