3 files changed, 9 insertions, 0 deletions
diff --git a/libopna/opna.c b/libopna/opna.c
index 8998a59..5c87127 100644
--- a/libopna/opna.c
+++ b/libopna/opna.c
@@ -44,6 +44,7 @@ void opna_mix_oscillo(struct opna *opna, int16_t *buf, unsigned samples, struct
   struct oscillodata *oscillofm = oscillo ? &oscillo[0] : 0;
   struct oscillodata *oscillossg = oscillo ? &oscillo[6] : 0;
 #else
+  (void)oscillo;
   struct oscillodata *oscillofm = 0, *oscillossg = 0;
   unsigned offset = 0;
 #endif
diff --git a/libopna/opnafm.c b/libopna/opnafm.c
index dc19b6d..7555ef3 100644
--- a/libopna/opnafm.c
+++ b/libopna/opnafm.c
@@ -607,6 +607,7 @@ void opna_fm_writereg(struct opna_fm *fm, unsigned reg, unsigned val) {
   }
 }
 
+#ifdef LIBOPNA_ENABLE_OSCILLO
 static int gcd(int a, int b) {
   if (a < b) {
     int t = a;
@@ -621,6 +622,7 @@ static int gcd(int a, int b) {
   }
   return b;
 }
+#endif
 
 void opna_fm_mix(struct opna_fm *fm, int16_t *buf, unsigned samples,
                  struct oscillodata *oscillo, unsigned offset) {
@@ -646,6 +648,9 @@ void opna_fm_mix(struct opna_fm *fm, int16_t *buf, unsigned samples,
       }
     }
   }
+#else
+  (void)oscillo;
+  (void)offset;
 #endif
   unsigned level[6] = {0};
   for (unsigned i = 0; i < samples; i++) {
diff --git a/libopna/opnassg.c b/libopna/opnassg.c
index ee6498a..404be59 100644
--- a/libopna/opnassg.c
+++ b/libopna/opnassg.c
@@ -316,6 +316,9 @@ void opna_ssg_mix_55466(
       }
     }
   }
+#else
+  (void)oscillo;
+  (void)offset;
 #endif
   unsigned level[3] = {0};
   for (int i = 0; i < samples; i++) {