#### OSS support (optional) ####
-AC_CHECK_HEADERS([sys/soundcard.h], [HAVE_OSS=1], [HAVE_OSS=0])
+AC_CHECK_HEADERS([sys/soundcard.h], [
+HAVE_OSS=1
+AC_DEFINE([HAVE_OSS], 1, [Have OSS?])
+], [HAVE_OSS=0])
AC_SUBST(HAVE_OSS)
AM_CONDITIONAL([HAVE_OSS], [test "x$HAVE_OSS" = x1])
+
#### ALSA support (optional) ####
-PKG_CHECK_MODULES(ASOUNDLIB, [ alsa >= 1.0.0 ], [HAVE_ALSA=1], [HAVE_ALSA=0])
+PKG_CHECK_MODULES(ASOUNDLIB, [ alsa >= 1.0.0 ], [
+HAVE_ALSA=1
+AC_DEFINE([HAVE_ALSA], 1, [Have ALSA?])
+], [HAVE_ALSA=0])
AC_SUBST(ASOUNDLIB_CFLAGS)
AC_SUBST(ASOUNDLIB_LIBS)
AC_SUBST(HAVE_ALSA)