Add Portfolio stub for non-Windows platforms

Author: benstone

src/CMakeLists.txt

@@ -96,6 +96,7 @@ target_sources(studio
 
     # TODO: replace with a module that saves settings to a file
     $<$<NOT:$<PLATFORM_ID:Windows>>:${PROJECT_SOURCE_DIR}/src/studio/configstub.cpp>
+    $<$<NOT:$<PLATFORM_ID:Windows>>:${PROJECT_SOURCE_DIR}/src/studio/portfstub.cpp>
 )
 
 target_include_directories(studio

src/studio/portfstub.cpp

@@ -0,0 +1,15 @@
+/***************************************************************************
+
+    portfstub.cpp: Portfolio stub
+
+***************************************************************************/
+#include "studio.h"
+
+ASSERTNAME
+
+bool FPortDisplayWithIds(FNI *pfni, bool fOpen, int32_t lFilterLabel, int32_t lFilterExt, int32_t lTitle,
+                         PCSZ lpstrDefExt, PSTN pstnDefFileName, FNI *pfniInitialDir, uint32_t grfPrevType, CNO cnoWave)
+{
+    Bug("Portfolio not implemented on this platform");
+    return fFalse;
+}