• d-bugmail puremagic.com (34/34) Aug 09 2022 https://issues.dlang.org/show_bug.cgi?id=23290

d-bugmail puremagic.com writes:

https://issues.dlang.org/show_bug.cgi?id=23290

          Issue ID: 23290
           Summary: Interfacing to C++ mention C++ symbols may have been
                    stripped
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: dlang.org
          Assignee: nobody puremagic.com
          Reporter: alphaglosined gmail.com

When compiling against C++ object files, it is possible that the compiler has
stripped symbols out of the object file.

For instance, if you have the following code in a cpp file:


```c++
#include <iostream>
struct Foo
{
    void print()
    {
        std::cout << "foo: " << a << ": hello from c++\n";
    }

    int a;
};
```

And try to link against it when compiling with ``clang -c`` it will result in
the linker error: ``undefined reference to 'Foo::print()'``.

This is worth mentioning in the docs for Interfacing to C++ page as it could be
a gotcha that can lead to people spinning their wheels (it was encountered by
someone on Discord).

--