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* [Bug c++/98105] New: constexpr and unnamed namespace yields relocation R_X86_64_PC32 against undefined symbol ... can not be used when making a shared object; recompile with -fPIC
@ 2020-12-02 19:03 peter_foelsche at mentor dot com
2020-12-03 7:26 ` [Bug c++/98105] " rguenth at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: peter_foelsche at mentor dot com @ 2020-12-02 19:03 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98105
Bug ID: 98105
Summary: constexpr and unnamed namespace yields relocation
R_X86_64_PC32 against undefined symbol ... can not be
used when making a shared object; recompile with -fPIC
Product: gcc
Version: 10.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: peter_foelsche at mentor dot com
Target Milestone: ---
Created attachment 49665
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49665&action=edit
g++-10 -std=c++11 2.cxx -shared -fPIC
please compile with
g++-10 -std=c++11 2.cxx -shared -fPIC
This is g++:
g++-10 (Ubuntu 10.2.0-5ubuntu1~20.04) 10.2.0
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/98105] constexpr and unnamed namespace yields relocation R_X86_64_PC32 against undefined symbol ... can not be used when making a shared object; recompile with -fPIC
2020-12-02 19:03 [Bug c++/98105] New: constexpr and unnamed namespace yields relocation R_X86_64_PC32 against undefined symbol ... can not be used when making a shared object; recompile with -fPIC peter_foelsche at mentor dot com
@ 2020-12-03 7:26 ` rguenth at gcc dot gnu.org
2020-12-03 13:06 ` peter_foelsche at mentor dot com
2023-06-07 2:26 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: rguenth at gcc dot gnu.org @ 2020-12-03 7:26 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98105
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Keywords| |wrong-code
Ever confirmed|0 |1
Last reconfirmed| |2020-12-03
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
So somehow we are not emitting
namespace
{
class myFactory:public factory
{ public:
static constexpr LIST s_sList = {
{1.0, 0}
};
...
};
}
but I'm not literate enough in C++ to tell if there's a definition missing.
It works with -std=c++17 but not with -std=c++11 or -std=c++14
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/98105] constexpr and unnamed namespace yields relocation R_X86_64_PC32 against undefined symbol ... can not be used when making a shared object; recompile with -fPIC
2020-12-02 19:03 [Bug c++/98105] New: constexpr and unnamed namespace yields relocation R_X86_64_PC32 against undefined symbol ... can not be used when making a shared object; recompile with -fPIC peter_foelsche at mentor dot com
2020-12-03 7:26 ` [Bug c++/98105] " rguenth at gcc dot gnu.org
@ 2020-12-03 13:06 ` peter_foelsche at mentor dot com
2023-06-07 2:26 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: peter_foelsche at mentor dot com @ 2020-12-03 13:06 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98105
--- Comment #2 from Peter Foelsche <peter_foelsche at mentor dot com> ---
sorry -- adding a definition outside of class for the variable solves the
problem!
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/98105] constexpr and unnamed namespace yields relocation R_X86_64_PC32 against undefined symbol ... can not be used when making a shared object; recompile with -fPIC
2020-12-02 19:03 [Bug c++/98105] New: constexpr and unnamed namespace yields relocation R_X86_64_PC32 against undefined symbol ... can not be used when making a shared object; recompile with -fPIC peter_foelsche at mentor dot com
2020-12-03 7:26 ` [Bug c++/98105] " rguenth at gcc dot gnu.org
2020-12-03 13:06 ` peter_foelsche at mentor dot com
@ 2023-06-07 2:26 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-06-07 2:26 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98105
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Reduced:
```
void f(const int&);
namespace {
struct myFactory
{
static constexpr int s_sList = 1;
};
}
//constexpr int myFactory::s_sList;
void sdi_register_model()
{
f(myFactory::s_sList);
}
```
If we uncomment the definition, it works.
I think this is correct behavior, just we should produce a better error message
of not have the definition and only the declaration here.
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2023-06-07 2:26 UTC | newest]
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2020-12-02 19:03 [Bug c++/98105] New: constexpr and unnamed namespace yields relocation R_X86_64_PC32 against undefined symbol ... can not be used when making a shared object; recompile with -fPIC peter_foelsche at mentor dot com
2020-12-03 7:26 ` [Bug c++/98105] " rguenth at gcc dot gnu.org
2020-12-03 13:06 ` peter_foelsche at mentor dot com
2023-06-07 2:26 ` pinskia at gcc dot gnu.org
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