feat: add MinGW cross-compilation support for Windows builds on Linux (#2108)

3rd/compat-mingw/dlfcn.c

@@ -0,0 +1,20 @@
+#include "dlfcn.h"
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+void *dlopen(const char *path, int flag) {
+    return LoadLibraryA(path);
+}
+
+const char *dlerror() {
+    DWORD err = GetLastError();
+    HLOCAL LocalAddress = NULL;
+    FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_FROM_SYSTEM,
+                  NULL, err, 0, (PTSTR)&LocalAddress, 0, NULL);
+    return (LPSTR)LocalAddress;
+}
+
+void *dlsym(void *dl, const char *sym) {
+    return GetProcAddress(dl, sym);
+}
+