[Bug boehm-gc/48514] [4.6] boehm gc incorrectly compile using __declspec(dllexport) on i686-w64-mingw32 target

[ktietz at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48514

--- Comment #2 from Kai Tietz <ktietz at gcc dot gnu.org> 2012-02-02 10:51:56 UTC ---
well, the underlying issue is here the wrong assumption of the meaning of _DLL
macro for Windows targets.  This macro gets defined, if shared (means DLL)
version of msvcrt.dll is used and has nothing to do with the fact, if a DLL is
build, or not.

I will prepare a patch for it