Merge branch 'morgant-fix-missing-math-lib'

Author: dim13

Makefile.bsd-wrapper

@@ -11,7 +11,7 @@ PCCF!=	pkg-config --cflags ${LIBS}
 CFLAGS+=${PCCF}
 
 PCLA!=	pkg-config --libs ${LIBS}
-LDADD+=	${PCLA} -lsndio
+LDADD+=	${PCLA} -lm -lsndio
 
 DEBUG+=	-Wall
 NOMAN=

README.md

@@ -6,7 +6,24 @@ Visualisation hack for OpenBSD (sndio) and Linux (alsa) playback.
 
 ## OpenBSD
 
-`sndiod` must be started in monitoring mode: `sndiod -m play,mon,midi`
+Install required packages:
+
+```
+pkg_add fftw3
+```
+
+Build:
+
+```
+make -f Makefile.bsd-wrapper
+```
+
+`sndiod` must be started in monitoring mode (see the [Multimedia: Recording a Monitor Mix of All Audio Playback](https://www.openbsd.org/faq/faq13.html#recordmon) section of the FAQ:)
+
+```
+rcctl set sndiod flags -s default -m play,mon -s mon
+rcctl restart sndiod
+```
 
 ## Linux