https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88114
Bug ID: 88114
Summary: "virtual ~destructor() = default": Destructor not
created
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: burnus at gcc dot gnu.org
Target Milestone: ---
Created attachment 45045
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45045&action=edit
Test case (test.tar.gz with test.h test.cc test2.h test3.cc); use: g++
-std=c++11 test.cc test3.cc
That's with current GCC 7, 8 and 9.
It works with Clang++ 5.0
# g++ -std=c++11 test.cc test3.cc
/tmp/ccEAjdJa.o: In function `Two::~Two()':
test3.cc:(.text._ZN3TwoD2Ev[_ZN3TwoD5Ev]+0x30): undefined reference to
`One::~One()'
That's with using
#pragma interface (in test.h)
and
#pragma implementation (in test.cc)
The destructor One::~One() is supposed to get created when compiling "test.cc".
The symbol *is* generated *unless* both of the following
* virtual ~One = default; // Using 'inline virtual ~One() {}' works
* There is (at least one) 'virtual ... = 0' function
