Add wx headers and ext

wxheaders/wx/beforestd.h

@@ -0,0 +1,44 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/beforestd.h
+// Purpose:     #include before STL headers
+// Author:      Vadim Zeitlin
+// Modified by:
+// Created:     07/07/03
+// Copyright:   (c) 2003 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+/**
+    Unfortunately, when compiling at maximum warning level, the standard
+    headers themselves may generate warnings -- and really lots of them. So
+    before including them, this header should be included to temporarily
+    suppress the warnings and after this the header afterstd.h should be
+    included to enable them back again.
+
+    Note that there are intentionally no inclusion guards in this file, because
+    it can be included several times.
+ */
+
+#if defined(__VISUALC__) && __VISUALC__ >= 1910
+    #pragma warning(push, 1)
+
+    // This warning, given when a malloc.h from 10.0.240.0 version of UCRT,
+    // which is used when building projects targeting 8.1 SDK, compiled by MSVS
+    // 2017 or later, is still given even at warning level 1, in spite of it
+    // being level 4, so we have to explicitly disable it here (as we do it
+    // after the warning push pragma, it will be restored after pop).
+    //
+    // expression before comma has no effect; expected expression with side-effect
+    #pragma warning(disable:4548)
+#endif // VC++ >= 14.1
+
+/**
+    GCC's visibility support is broken for libstdc++ in some older versions
+    (namely Debian/Ubuntu's GCC 4.1, see
+    https://bugs.launchpad.net/ubuntu/+source/gcc-4.1/+bug/109262). We fix it
+    here by mimicking newer versions' behaviour of using default visibility
+    for libstdc++ code.
+ */
+#if defined(HAVE_VISIBILITY) && defined(HAVE_BROKEN_LIBSTDCXX_VISIBILITY)
+    #pragma GCC visibility push(default)
+#endif