https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89105
Bug ID: 89105
Summary: -Wabi warns for functions with internal linkage
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: diagnostic
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: redi at gcc dot gnu.org
Target Milestone: ---
// { dg-options "-fabi-version=12 -Wabi=11" }
namespace {
template<typename F>
void run(F f, int i)
{
f(i);
}
}
void f()
{
run([](int) { }, 1);
}
wabi.cc: In function ‘void f()’:
wabi.cc:13:6: warning: empty class ‘f()::<lambda(int)>’ parameter passing ABI
changes in -fabi-version=12 (GCC 8) [-Wabi]
run([](int) { }, 1);
~~~^~~~~~~~~~~~~~~~
wabi.cc: In function ‘void {anonymous}::run(F, int) [with F =
f()::<lambda(int)>]’:
wabi.cc:5:10: warning: empty class ‘f()::<lambda(int)>’ parameter passing ABI
changes in -fabi-version=12 (GCC 8) [-Wabi]
void run(F f, int i)
^~~
This seems like a false position, because the function cannot be called from
outside the current translation unit. It has internal linkage, and its address
is never taken.
Making it static instead of using an unnamed namespace doesn't change anything.
