Try detecting ALSA better.

Makefile.in

@@ -59,10 +59,9 @@ SRCS=	\
 	vomp.c \
         xprintf.c
 
-# Only build these on Linux
-ifeq (0, 1)
-SRCS+=	audio_alsa.c \
-	audio_msm_g1.c
+HAVE_ALSA= @HAVE_ALSA@
+ifeq (HAVE_ALSA,1)
+SRCS+=	audio_alsa.c
 endif
 
 MONITORCLIENTSRCS=conf.c \

audiodevices.c

@@ -33,7 +33,7 @@ int detectAudioDevice()
 #ifdef ANDROID
   if (!audev) audev=audio_msm_g1_detect();
 #endif
-#ifdef linux
+#ifdef HAVE_SYS_ALSA_ASOUNDLIB_H
   if (!audev) audev=audio_alsa_detect();
 #endif
   if (audev) {

configure.in

@@ -92,13 +92,17 @@ AC_CHECK_HEADERS(
     net/route.h \
     signal.h \
     jni.h \
-    alsa/asoundlib.h \
     ucred.h \
     sys/filio.h \
     sys/endian.h \
     sys/byteorder.h \
 )
 
+dnl Check for ALSA
+AC_CHECK_HEADER([alsa/asoundlib.h], [have_alsa=1], [have_alsa=0])
+AS_IF([test x"$have_alsa" = "x1"], [AC_DEFINE([HAVE_ALSA_ASOUNDLIB_H])])
+AS_IF([test x"$have_alsa" = "x1"], [AC_SUBST(HAVE_ALSA,1)], [AC_SUBST(HAVE_ALSA,0)])
+
 echo "Fetching and building NaCl if required."
 echo "(this can take HOURS to build depending on your architecture,"
 echo " but fortunately it only needs to happen once.)"