diff --git a/barriers.cpp b/barriers.cpp
index 515c02c2..26970ce9 100644
--- a/barriers.cpp
+++ b/barriers.cpp
@@ -363,8 +363,11 @@ EX void extendBarrier(cell *c) {
     }
 
   if(c->barleft == NOWALLSEP) {
+    #if MAXMDIM >= 4
     if(WDIM == 3) extend3D(c);
-    else extendNowall(c);
+    else 
+    #endif
+    extendNowall(c);
     return;
     }
   
diff --git a/config.cpp b/config.cpp
index a1aad336..ccf2b15d 100644
--- a/config.cpp
+++ b/config.cpp
@@ -1194,10 +1194,12 @@ EX void configureInterface() {
   gamescreen(3);
   dialog::init(XLAT("interface"));
 
+  #if CAP_TRANS
   if(CAP_TRANS) {
     dialog::addSelItem(XLAT("language"), XLAT("EN"), 'l');
     dialog::add_action_push(selectLanguageScreen);
     }
+  #endif
 
   dialog::addSelItem(XLAT("player character"), numplayers() > 1 ? "" : csname(vid.cs), 'g');
   dialog::add_action_push(showCustomizeChar);
diff --git a/control.cpp b/control.cpp
index b7243855..e0cdb10a 100644
--- a/control.cpp
+++ b/control.cpp
@@ -1090,6 +1090,10 @@ EX bool handleCompass() {
   return false;
   }
 
+#if CAP_ORIENTATION
+EX transmatrix getOrientation();
+#endif
+
 // orientation sensitivity
 EX namespace ors {
 
@@ -1100,10 +1104,10 @@ int when_enabled;
 transmatrix last_orientation;
 transmatrix relative_matrix = Id;
 
-string choices[3] = {"OFF", "relative", "absolute"};
+EX string choices[3] = {"OFF", "relative", "absolute"};
 
 #if CAP_ORIENTATION
-transmatrix getOrientation() {
+EX transmatrix getOrientation() {
   return MirrorX * hr::getOrientation() * MirrorX;
   }
 #endif
diff --git a/hyper.h b/hyper.h
index 959906a9..6702df92 100644
--- a/hyper.h
+++ b/hyper.h
@@ -26,7 +26,7 @@ namespace hr {
 
 struct always_false {
   operator bool() const { return false; };
-  void operator = (bool b) const {};
+  bool operator = (bool b) const { return b; };
   };
 
 template<class T>
diff --git a/inventory.cpp b/inventory.cpp
index f0b97115..d0702d23 100644
--- a/inventory.cpp
+++ b/inventory.cpp
@@ -672,7 +672,11 @@ EX namespace inv {
       }
     }
 
-#else
-always_false on, activating;
 #endif
-  }}
+
+#if !CAP_INV
+EX always_false on, activating;
+#endif
+EX }
+
+}
diff --git a/langen.cpp b/langen.cpp
index ec62dca2..f67a58cb 100644
--- a/langen.cpp
+++ b/langen.cpp
@@ -321,12 +321,14 @@ int main() {
     }
   printf("\n");
   printf("#if HDR\n");
+  printf("#if CAP_TRANS\n");
   printf("#define NUMEXTRA %d\n", isize(vchars));
   printf("#define NATCHARS {");
   for(auto&& elt : vchars) printf("\"%s\",", elt.c_str());
   printf("};\n");
   printf("extern const char* natchars[NUMEXTRA];\n");
   printf("#endif\n");
+  printf("#endif\n");
   printf("const char* natchars[NUMEXTRA] = NATCHARS;\n");
   printf("//javastring = \"%s\";\n", javastring.c_str());
   
diff --git a/racing.cpp b/racing.cpp
index eb73f95d..5e33d838 100644
--- a/racing.cpp
+++ b/racing.cpp
@@ -6,11 +6,11 @@
  */
 
 #include "hyper.h"
-#if CAP_RACING
 namespace hr {
 
 EX namespace racing {
 
+#if CAP_RACING
 void set_race_configurer();
 
 EX bool guiding = false;
@@ -1370,8 +1370,11 @@ EX void add_debug(cell *c) {
     dialog::addSelItem("completion", its(r.completion), 0);
     }
   }
+#endif
+
+#if !CAP_RACING
+EX always_false on;
+#endif
+EX }
 
 }
-
-EX }
-#endif
diff --git a/sound.cpp b/sound.cpp
index 6379c0a1..d1cf88e5 100644
--- a/sound.cpp
+++ b/sound.cpp
@@ -258,8 +258,6 @@ EX void reuse_music_memory() {
   for(auto& s: to_free) chunks.erase(s);
   }
 
-#else
-EX void resetmusic() {}
 #endif
 
 #if CAP_COMMANDLINE
@@ -280,4 +278,9 @@ auto ah_sound = addHook(hooks_args, 0, read_sound_args) + addHook(hooks_clear_ca
 
 #endif
 
+#if !CAP_SDLAUDIO
+EX void playSound(cell *c, const string& fname, int vol IS(100)) { }
+EX void resetmusic() { }
+#endif
+
 }