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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Ok, I have just found the cause of the error messages I am getting, and it now makes sense to me why the ‘normal’ build works fine on Windows, Linux and OS X, and why my personal build works on Linux and OS X, but not on Windows. However, I still don’t understand why I am getting the error messages I am getting.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Anyway, it has to do with wanting to export some classes and function, including clang::driver::Compilation. Now, since the export/import of classes/function is not supported by the LLVM+Clang project (incidentally, I really wish it was!), I had to modify the definition of the classes and functions that I need in order to have something like:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal style='text-indent:36.0pt'><span lang=EN-US>class LLVM_EXPORT Compilation { … };<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>rather than<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal style='text-indent:36.0pt'><span lang=EN-US>class Compilation { … };<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>with LLVM_EXPORT being defined as:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal style='margin-left:36.0pt'><span lang=EN-US>#ifdef _WIN32<o:p></o:p></span></p><p class=MsoNormal style='margin-left:36.0pt'><span lang=EN-US> #ifdef BUILD_LLVM<o:p></o:p></span></p><p class=MsoNormal style='margin-left:36.0pt'><span lang=EN-US> #define LLVM_EXPORT __declspec(dllexport)<o:p></o:p></span></p><p class=MsoNormal style='margin-left:36.0pt'><span lang=EN-US> #else<o:p></o:p></span></p><p class=MsoNormal style='margin-left:36.0pt'><span lang=EN-US> #define LLVM_EXPORT __declspec(dllimport)<o:p></o:p></span></p><p class=MsoNormal style='margin-left:36.0pt'><span lang=EN-US> #endif<o:p></o:p></span></p><p class=MsoNormal style='margin-left:36.0pt'><span lang=EN-US>#else<o:p></o:p></span></p><p class=MsoNormal style='margin-left:36.0pt'><span lang=EN-US> #define LLVM_EXPORT<o:p></o:p></span></p><p class=MsoNormal style='margin-left:36.0pt'><span lang=EN-US>#endif<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Now, as I mentioned before, that approach works fine up to LLVM+Clang 3.5.1, but it fails with LLVM+Clang 3.6. Not for all the classes/functions that I need to export/import though, only some of them (in Clang, it would seem).<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>To convince myself, I set up a very simple CMake+Ninja project to build tools/clang/lib/Driver/Compilation.cpp (and nothing else since it’s just for checking) and it builds fine if I have:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal style='text-indent:36.0pt'><span lang=EN-US>class Compilation { … };<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>but not if I have:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal style='text-indent:36.0pt'><span lang=EN-US>class declspec(dllexport) Compilation { … };<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>So… my question is: why?! More importantly: what do I need to do to be able to export/import a class such as clang::driver::Compilation?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Cheers, Alan.<o:p></o:p></span></p></div></body></html>