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-rw-r--r--src/mtx_bessel.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/mtx_bessel.c b/src/mtx_bessel.c
index 77ac9ea..f17342f 100644
--- a/src/mtx_bessel.c
+++ b/src/mtx_bessel.c
@@ -121,6 +121,8 @@ static void mTXBesselMatrix (MTXBessel *x, t_symbol *s,
int n,m,ofs;
+#ifdef HAVE_MATH_BESSEL
+
/* size check */
if (!size)
post("mtx_bessel: invalid dimensions");
@@ -165,6 +167,10 @@ static void mTXBesselMatrix (MTXBessel *x, t_symbol *s,
mTXBesselBang(x);
}
+
+#else
+ post("mtx_bessel: implementation requires math.h that implements jnf and ynf Bessel functions");
+#endif
}
void mtx_bessel_setup (void)