On Sat, Feb 5, 2022 at 2:39 PM Richard Shaw <hobbes1069(a)gmail.com&gt; wrote: So I'm trying to build a project that does have some nono instances of "using namespace std", however, I have removed them and I STILL get this error. Is it possible for mingw to conflict with itself?!?!? In file included from /usr/x86_64-w64-mingw32/sys-root/mingw/include/msxml.h:25,                  from /usr/x86_64-w64-mingw32/sys-root/mingw/include/urlmon.h:450,                  from /usr/x86_64-w64-mingw32/sys-root/mingw/include/objbase.h:163,                  from /usr/x86_64-w64-mingw32/sys-root/mingw/include/ole2.h:17,                  from /usr/x86_64-w64-mingw32/sys-root/mingw/include/wtypes.h:13,                  from /usr/x86_64-w64-mingw32/sys-root/mingw/include/winscard.h:10,                  from /usr/x86_64-w64-mingw32/sys-root/mingw/include/windows.h:97,                  from /usr/x86_64-w64-mingw32/sys-root/mingw/include/FL/Fl_Window.H:26,                  from /usr/x86_64-w64-mingw32/sys-root/mingw/include/FL/Fl_Double_Window.H:25,                  from ./include/lgbook.h:15,                  from logger/logger.cxx:37: /usr/x86_64-w64-mingw32/sys-root/mingw/include/oaidl.h:579:5: error: reference to 'byte' is ambiguous   579 |     byte *pRecord;       |     ^~~~ I have removed the instance of it in logger.cxx and it does not exist in lgbook.h or in fltk AFAIKT... What now? From what I can tell (and I'm no C/C++ expert) this problem was introduced in C++17 so perhaps building in C++14 will work around the issue but I can't seem to find a REAL fix. So no one has seen this? Still looking for a workaround.

On Fri, 11 Feb 2022, at 14:47, Richard Shaw wrote: On Sat, Feb 5, 2022 at 2:39 PM Richard Shaw <hobbes1069(a)gmail.com&gt; wrote: So I'm trying to build a project that does have some nono instances of "using namespace std", however, I have removed them and I STILL get this error. Is it possible for mingw to conflict with itself?!?!? In file included from /usr/x86_64-w64-mingw32/sys-root/mingw/include/msxml.h:25, from /usr/x86_64-w64-mingw32/sys-root/mingw/include/urlmon.h:450, from /usr/x86_64-w64-mingw32/sys-root/mingw/include/objbase.h:163, from /usr/x86_64-w64-mingw32/sys-root/mingw/include/ole2.h:17, from /usr/x86_64-w64-mingw32/sys-root/mingw/include/wtypes.h:13, from /usr/x86_64-w64-mingw32/sys-root/mingw/include/winscard.h:10, from /usr/x86_64-w64-mingw32/sys-root/mingw/include/windows.h:97, from /usr/x86_64-w64-mingw32/sys-root/mingw/include/FL/Fl_Window.H:26, from /usr/x86_64-w64-mingw32/sys-root/mingw/include/FL/Fl_Double_Window.H:25, from ./include/lgbook.h:15, from logger/logger.cxx:37: /usr/x86_64-w64-mingw32/sys-root/mingw/include/oaidl.h:579:5: error: reference to 'byte' is ambiguous 579 | byte *pRecord; | ^~~~ I have removed the instance of it in logger.cxx and it does not exist in lgbook.h or in fltk AFAIKT... What now? From what I can tell (and I'm no C/C++ expert) this problem was introduced in C++17 so perhaps building in C++14 will work around the issue but I can't seem to find a REAL fix. So no one has seen this? Still looking for a workaround. I've run into this in the past but it was due to using namespace std;