On Fri, Jan 18, 2013 at 2:55 AM, Marc Glisse <marc.glisse@xxxxxxxx> wrote: > On Thu, 17 Jan 2013, Solomon Gibbs wrote: > >> Hello, >> >> I have some C99 code used by C++11 application code. A few inline >> functions are declared in the C99 style with code explicitly generated >> in the translation unit using the C99 extern inline. >> >> However, when I try to use one of the inline functions in the C++ >> application, I get errors about multiple definitions at link time. It >> seems that g++ is instantiating the inline code that already exists in >> the library, despite the extern "C" specifier. > > > Your issue seems specific to windows. On linux, gcc does instantiate the > inline code, but it emits a weak symbol in app.o that is discarded at link > time in favor of the strong one in buffer.o. > > Since this code is valid under C99 and C++11 (correct?), and it appears that COFF support for weak symbols is under development, is this a deficiency that's reportable via the GCC or MinGW bug trackers?
