[gtk-vnc] configure: make pulseaudio detection non-automagic

[Daniel P. Berrange <dberrange src gnome org>]

commit ffb183053d258ff5112b2dc7ec78cb83de52e4c0
Author: Alexandre Rostovtsev <tetromino gentoo org>
Date:   Fri Apr 6 03:33:41 2012 -0400

    configure: make pulseaudio detection non-automagic
    
    This is to allow building gtk-vnc on a system with pulseaudio and then
    deploying on a system without pulseaudio.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=673570

 configure.ac |   21 +++++++++++++++++----
 1 files changed, 17 insertions(+), 4 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 0d5ae35..1e0447a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -213,11 +213,23 @@ AC_SUBST(VIEW_CFLAGS)
 AC_SUBST(VIEW_LIBS)
 
 
-PKG_CHECK_MODULES(PULSEAUDIO, libpulse-simple, WANT_PULSEAUDIO="yes", AC_MSG_NOTICE([Not building against libpulse]))
-if test "x$WANT_PULSEAUDIO" = xyes; then
-    AC_DEFINE_UNQUOTED([HAVE_PULSEAUDIO], 1,[Define if we have and want pulseaudio.])
+AC_ARG_WITH(pulseaudio,
+  [AS_HELP_STRING([--with-pulseaudio],
+    [use PulseAudio for audio playback @<:@default=check@:>@])],
+  [],
+  [with_pulseaudio=check])
+
+HAVE_PULSEAUDIO=no
+if test "x$with_pulseaudio" != "xno"; then
+  PULSEAUDIO_MODULES=libpulse-simple
+  if test "x$with_pulseaudio" == "xyes"; then
+    PKG_CHECK_MODULES(PULSEAUDIO, $PULSEAUDIO_MODULES, [HAVE_PULSEAUDIO=yes])
+  else
+    PKG_CHECK_MODULES(PULSEAUDIO, $PULSEAUDIO_MODULES, [HAVE_PULSEAUDIO=yes],
+      [AC_MSG_NOTICE([libpulse-simple not found, disabling PulseAudio support])])
+  fi
 fi
-AM_CONDITIONAL([HAVE_PULSEAUDIO], [test "x$WANT_PULSEAUDIO" = "xyes"])
+AM_CONDITIONAL([HAVE_PULSEAUDIO], [test "x$HAVE_PULSEAUDIO" = "xyes"])
 AC_SUBST(PULSEAUDIO_CFLAGS)
 AC_SUBST(PULSEAUDIO_LIBS)
 
@@ -484,5 +496,6 @@ Configure summary:
 	Install example programs ...:  ${WITH_EXAMPLES}
 	Browser plugin .............:  ${enable_plugin}
 	SASL support................:  ${enable_sasl}
+	PulseAudio support..........:  ${HAVE_PULSEAUDIO}
 	GTK+ version................:  ${GTK_API_VERSION}
 "