https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110258
Bug ID: 110258
Summary: Undefined reference to intrinsic when taking function
reference at namespace scope
Product: gcc
Version: 13.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: magnus.hegdahl at gmail dot com
Target Milestone: ---
Tested on g++ (GCC) 13.1.1 20230429 on Linux
```
#include <x86intrin.h>
// this doesn't work in GCC (but does in clang)
constexpr auto set1 = _mm_set1_epi32;
// this works
struct S {
static constexpr auto set1 = _mm_set1_epi32;
};
int main() {
// and this works
_mm_set1_epi32(1);
}
```
output:
/usr/bin/ld: /tmp/ccaN0gLC.o:(.data.rel.ro+0x0): undefined reference to
`_mm_set1_epi32(int)'
collect2: error: ld returned 1 exit status
The code seems to work as expected with other function pointers,
even when defined in other translation units.
I've only seen the problem with intrinsics.
