1 files changed, 11 insertions, 0 deletions
diff --git a/src/debug.h b/src/debug.h
index 0489a81..a32bfd2 100644
--- a/src/debug.h
+++ b/src/debug.h
@@ -60,11 +60,22 @@ void disable_segfpe();
   { auto x = m * n;                                      \
     enforce_msg(x / m == n, "multiply integer overflow"); }
 
+#ifndef NDEBUG
+
 void write(const double d, const char *msg = "");
 void write(const char *s, const char *msg = "");
 void write(const gsl_vector *v, const char *msg = "");
 void write(const gsl_matrix *m, const char *msg = "");
 
+#else // NDEBUG
+
+inline void write(const double d, const char *msg = "") {};
+inline void write(const char *s, const char *msg = "") {};
+inline void write(const gsl_vector *v, const char *msg = "") {};
+inline void write(const gsl_matrix *m, const char *msg = "") {};
+
+#endif // NDEBUG
+
 gsl_matrix *gsl_matrix_safe_alloc(size_t rows,size_t cols);
 int gsl_matrix_safe_memcpy (gsl_matrix *dest, const gsl_matrix *src);
 void gsl_matrix_safe_free (gsl_matrix *v);