https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88136
Bug ID: 88136
Summary: -Wdeprecated-copy is draconian and shouldn't be in
-Wall
Product: gcc
Version: lto
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ville.voutilainen at gmail dot com
Target Milestone: ---
Consider code like this:
struct X
{
protected:
~X() {}
};
struct Y : X
{
Y() = default;
Y(const Y& other) : X(other) {}
};
int main()
{
Y y;
Y y2 = y;
}
gcc 9 warns about it, because X has a user-provided destructor. However, in
this particular case, and in cases where the implicitly-defaulted copy/move
are fine but the destructor does some extra work and is thus user-provided, the
compiler will warn.
The warning completely shatters the ability to build Qt.
