https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114013
Bug ID: 114013
Summary: [14 Regression] Specializations of var templates no
longer emitted since r14-8987
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jakub at gcc dot gnu.org
Target Milestone: ---
struct S { int a, b; };
template <int N>
constexpr struct S var[16] = {};
template <>
constexpr inline struct S var<6>[8] = {
{ 1, 1 }, { 2, 0 }, { 3, 1 }, { 4, 0 },
{ 5, 1 }, { 6, 0 }, { 7, 1 }, { 8, 0 }
};
[[gnu::noipa]] void
foo (S)
{
}
template <int N>
void
bar (int x)
{
foo (var<N>[x]);
}
volatile int x;
int
main ()
{
bar <6> (x);
}
extracted from mesa no longer links starting with
r14-8987-gdd9d14f7d53de07beff06004922a2bff20ece671 (-O0 or -O2, doesn't
matter).
/usr/bin/ld: /tmp/cc4Mqq20.o: in function `void bar<6>(int)':
mesa.C:(.text._Z3barILi6EEvi[_Z3barILi6EEvi]+0x14): undefined reference to
`var<6>'
collect2: error: ld returned 1 exit status
