Add a little hack for running under wine, used in testing

Signed-off-by: falkTX <falktx@falktx.com>

.github/workflows/build.yml

@@ -5,6 +5,7 @@ on:
 
 env:
   CACHE_VERSION: 24
+  CARDINAL_UNDER_WINE: 1
   DEBIAN_FRONTEND: noninteractive
   HOMEBREW_NO_AUTO_UPDATE: 1
   LIBGL_ALWAYS_SOFTWARE: 'true'

src/override/common.cpp

@@ -38,6 +38,8 @@
 #include <windows.h>
 
 FILE* fopen_u8(const char* filename, const char* mode) {
+	if (std::strncmp(filename, "\\\\?\\", 4) == 0 && std::getenv("CARDINAL_UNDER_WINE") != nullptr)
+		filename = "Z:\\dev\\null";
 	return _wfopen(rack::string::UTF8toUTF16(filename).c_str(), rack::string::UTF8toUTF16(mode).c_str());
 }