Initial commit

1 files changed, 28 insertions, 0 deletions

diff --git a/Minecraft.Client/crt_compat.cpp b/Minecraft.Client/crt_compat.cpp
new file mode 100644
index 00000000..9b9f92a1
--- /dev/null
+++ b/Minecraft.Client/crt_compat.cpp
@@ -0,0 +1,28 @@
+// CRT compatibility shim for linking VS2012-era libraries with VS2022
+// Provides symbols removed in the Universal CRT (VS2015+)
+
+#include <cstdio>
+#include <cstring>
+
+// __iob_func was removed in VS2015. Old code (e.g. libpng) references it.
+// Provide a shim that returns the stdio file pointers.
+extern "C" FILE* __iob_func(void)
+{
+    // The old __iob_func returned an array of {stdin, stdout, stderr}.
+    // In the Universal CRT, these are functions, not a contiguous array.
+    // We return a static array mimicking the old layout.
+    static FILE iob[3];
+    iob[0] = *stdin;
+    iob[1] = *stdout;
+    iob[2] = *stderr;
+    return iob;
+}
+
+// std::_Winerror_map was an internal MSVC runtime function used by
+// std::system_category::message(). Old .lib files compiled with VS2012
+// may reference it. Provide a minimal stub.
+namespace std {
+    const char* _Winerror_map(int) {
+        return "";
+    }
+}