[UCRT:VCRUNTIME] Implement vcruntime init stubs

sdk/lib/ucrt/vcruntime/__vcrt_init.c

@@ -0,0 +1,36 @@
+//
+// __vcrt_init.c
+//
+//      Copyright (c) 2024 Timo Kreuzer
+//
+// Implementation of vcruntime initialization and termination functions.
+//
+// SPDX-License-Identifier: MIT
+//
+
+#include <vcruntime_startup.h>
+
+__vcrt_bool __cdecl __vcrt_initialize(void)
+{
+    return 1;
+}
+
+__vcrt_bool __cdecl __vcrt_uninitialize(_In_ __vcrt_bool _Terminating)
+{
+    return 1;
+}
+
+__vcrt_bool __cdecl __vcrt_uninitialize_critical(void)
+{
+    return 1;
+}
+
+__vcrt_bool __cdecl __vcrt_thread_attach(void)
+{
+    return 1;
+}
+
+__vcrt_bool __cdecl __vcrt_thread_detach(void)
+{
+    return 1;
+}

sdk/lib/ucrt/vcruntime/vcruntime.cmake

@@ -3,6 +3,7 @@ list(APPEND UCRT_VCRUNTIME_SOURCES
     vcruntime/__report_gsfailure.c
     vcruntime/__report_rangecheckfailure.c
     vcruntime/__security_init_cookie.c
+    vcruntime/__vcrt_init.c
 )
 
 if(${ARCH} STREQUAL "i386")