[Issue 16289] New: no extern(C++) mangling for unsigned long

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=16289

          Issue ID: 16289
           Summary: no extern(C++) mangling for unsigned long
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: code at dawg.eu

The C++ mangler conflates mangling for unsigned, unsigned long, and unsigned
long long depending on the target architecture. Those are separate manglings in
C++, independent of their target size.
This leads to several linking problems w/ C++ code, in particular when a size_t
parameter is involved.
We already have some places in cppmangle where we properly handle
Id.__c_long/Id.__c_ulong. This should be extended to size_t parameters in
extern(C++) functions. We might also consider to change the size_t declaration
to exactly match the C++ definition of the used platform.

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