Add OpenBSD support in volume.c

components/volume.c

@@ -1,8 +1,11 @@
 /* See LICENSE file for copyright and license details. */
-#if defined(__linux__)
 #include <errno.h>
 #include <fcntl.h>
+#if defined(__OpenBSD__)
+# include <soundcard.h>
+#else
 # include <sys/soundcard.h>
+#endif
 #include <sys/ioctl.h>
 #include <stdio.h>
 #include <string.h>
@@ -42,4 +45,3 @@ vol_perc(const char *card)
 
 	return bprintf("%d", v & 0xff);
 }
-#endif

config.mk

@@ -10,11 +10,14 @@ MANPREFIX = ${PREFIX}/share/man
 X11INC = /usr/X11R6/include
 X11LIB = /usr/X11R6/lib
 
+# OpenBSD (uncomment)
+#OSSLIBS = -lossaudio
+
 # flags
 CPPFLAGS = -I$(X11INC) -D_DEFAULT_SOURCE
 CFLAGS   = -std=c99 -pedantic -Wall -Wextra -Os
 LDFLAGS  = -L$(X11LIB) -s
-LDLIBS   = -lX11
+LDLIBS   = -lX11 ${OSSLIBS}
 
 # compiler and linker
 CC = cc