Add wxUSE_COMPILER_TLS to allow disabling compiler TLS support.

Compiler TLS support is broken under Win32/MSVC when used for a code which is
part of a dynamically loaded DLL, so allow disabling it.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71792 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/os2/setup0.h

@@ -267,6 +267,17 @@
 // Recommended setting: 1 if you want to support multiple languages
 #define wxUSE_PRINTF_POS_PARAMS      1
 
+// Enable the use of compiler-specific thread local storage keyword, if any.
+// This is used for wxTLS_XXX() macros implementation and normally should use
+// the compiler-provided support as it's simpler and more efficient, but must
+// not use it if wxWidgets is used in a dynamically loaded Win32 (i.e. using
+// LoadLibrary()/GetProcAddress()) as this triggers a bug in compiler TLS
+// support that results in crashes when any TLS variables are used. So if you
+// are building a Win32 DLL using wxWidgets that can be loaded dynamically, set
+// this to 0.
+//
+// Default is 1, but set to 0 if the scenario above is applicable.
+#define wxUSE_COMPILER_TLS 1
 
 // ----------------------------------------------------------------------------
 // Interoperability with the standard library.