Mono: Reorganize build scripts

All build scripts, other than config.py and SCSub, are now located in the build_scripts subdirectory.

modules/mono/build_scripts/tls_configure.py

@@ -0,0 +1,36 @@
+from __future__ import print_function
+
+def supported(result):
+    return 'supported' if result else 'not supported'
+
+
+def check_cxx11_thread_local(conf):
+    print('Checking for `thread_local` support...', end=" ")
+    result = conf.TryCompile('thread_local int foo = 0; int main() { return foo; }', '.cpp')
+    print(supported(result))
+    return bool(result)
+
+
+def check_declspec_thread(conf):
+    print('Checking for `__declspec(thread)` support...', end=" ")
+    result = conf.TryCompile('__declspec(thread) int foo = 0; int main() { return foo; }', '.cpp')
+    print(supported(result))
+    return bool(result)
+
+
+def check_gcc___thread(conf):
+    print('Checking for `__thread` support...', end=" ")
+    result = conf.TryCompile('__thread int foo = 0; int main() { return foo; }', '.cpp')
+    print(supported(result))
+    return bool(result)
+
+
+def configure(conf):
+    if check_cxx11_thread_local(conf):
+        conf.env.Append(CPPDEFINES=['HAVE_CXX11_THREAD_LOCAL'])
+    else:
+        if conf.env.msvc:
+            if check_declspec_thread(conf):
+                conf.env.Append(CPPDEFINES=['HAVE_DECLSPEC_THREAD'])
+        elif check_gcc___thread(conf):
+            conf.env.Append(CPPDEFINES=['HAVE_GCC___THREAD'])