configure.ac: add option --enable-solaris-output

Allow enabling the plugin explicitly without running Solaris, to test
the build.

NEWS

@@ -2,6 +2,7 @@ ver 0.16.5 (2010/??/??)
 * configure.ac
   - disable assertions in the non-debugging build
   - show solaris plugin result correctly
+  - add option --enable-solaris-output
 * pcm_format: fix 32-to-24 bit conversion (the "silence" bug)
 * input:
   - rewind: reduce heap usage

configure.ac

@@ -324,6 +324,11 @@ AC_ARG_ENABLE(sndfile,
 		[enable sndfile support]),,
 	enable_sndfile=auto)
 
+AC_ARG_ENABLE(solaris_output,
+	AS_HELP_STRING([--enable-solaris-output],
+		[enables the Solaris /dev/audio output]),,
+	[enable_solaris_output=auto])
+
 AC_ARG_ENABLE(sqlite,
 	AS_HELP_STRING([--enable-sqlite],
 		[enable support for the SQLite database]),,
@@ -1370,16 +1375,22 @@ fi
 AM_CONDITIONAL(HAVE_SHOUT, test x$enable_shout = xyes)
 
 dnl --------------------------------- Solaris ---------------------------------
-case "$host_os" in
+
+if test x$enable_solaris_output = xauto; then
+	case "$host_os" in
 	solaris*)
-		AC_DEFINE(ENABLE_SOLARIS_OUTPUT, 1, [Define to enable Solaris /dev/audio support])
 		enable_solaris_output=yes
 		;;
 
 	*)
 		enable_solaris_output=no
 		;;
-esac
+	esac
+fi
+
+if test x$enable_solaris_output = xyes; then
+	AC_DEFINE(ENABLE_SOLARIS_OUTPUT, 1, [Define to enable Solaris /dev/audio support])
+fi
 
 AM_CONDITIONAL(ENABLE_SOLARIS_OUTPUT, test x$enable_solaris_output = xyes)
 

src/output/solaris_output_plugin.c

@@ -23,7 +23,6 @@
 
 #include <glib.h>
 
-#include <sys/audio.h>
 #include <sys/stropts.h>
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -31,6 +30,25 @@
 #include <fcntl.h>
 #include <errno.h>
 
+#ifdef __sun
+#include <sys/audio.h>
+#else
+
+/* some fake declarations that allow build this plugin on systems
+   other than Solaris, just to see if it compiles */
+
+#define AUDIO_GETINFO 0
+#define AUDIO_SETINFO 0
+#define AUDIO_ENCODING_LINEAR 0
+
+struct audio_info {
+	struct {
+		unsigned sample_rate, channels, precision, encoding;
+	} play;
+};
+
+#endif
+
 #undef G_LOG_DOMAIN
 #define G_LOG_DOMAIN "solaris_output"