[Bug c++/92786] New: [c++11] static constexpr member link error

[xavierb at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92786

            Bug ID: 92786
           Summary: [c++11] static constexpr member link error
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: xavierb at gmail dot com
  Target Milestone: ---

hi,

this code doesn't link:

---
struct STest {
        static int GetVal(int x) {return vals[x];}
        static constexpr int vals[] = { 1,2,3,4,4,4,4 };
};
int main() 
{
    return STest::GetVal(1);
}
---

/usr/bin/ld: /tmp/ccqFvLiy.o: in function `STest::GetVal(int)':
bug.cpp:(.text._ZN5STest6GetValEi[_ZN5STest6GetValEi]+0x17): undefined
reference to `STest::vals'
collect2: error: ld returned 1 exit status


(seems to work fine with 
clang >= 9  (but not with version <=8),
msvc and icc )