[LLVMbugs] [Bug 10978] New: dllexport/dllimport attributes not fully implemented

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=10978

           Summary: dllexport/dllimport attributes not fully implemented
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: Frontend
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: vanboxem.ruben at gmail.com
                CC: llvmbugs at cs.uiuc.edu


While compiling Qt with Clang (partially) on Windows 32-bit (i686-w64-mingw32),
I ran into:

..\..\include\QtCore/../../../../Source/Qt/src/corelib/codecs/qtextcodec.h:177:7:
warning: 'dllexport' attribute only applies to variables and functions
class Q_CORE_EXPORT QTextDecoder {
      ^
..\..\include\QtCore/../../../../Source/Qt/src/corelib/global/qglobal.h:1301:29:
note: expanded from:
#      define Q_CORE_EXPORT Q_DECL_EXPORT
                            ^
..\..\include\QtCore/../../../../Source/Qt/src/corelib/global/qglobal.h:1267:38:
note: expanded from:
#    define Q_DECL_EXPORT __declspec(dllexport)
                                     ^
<built-in>:132:38: note: expanded from:
#define __declspec(a) __attribute__((a))
                                     ^
43 warnings generated.

This is not right. You can dllexport/dllimport full classes too.
On top of this, x86_64-w64-mingw32 emits warnings about ignored
dllexport/dllimport regardless.

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