autotools: add support for disabling async command support (--without-async/--with-async=no)

Makefile.am

 	src/voices.cpp \
 	src/wavegen.cpp 
 
+libespeak_FLAGS  =
 libespeak_SOURCE = \
 	src/speak_lib.cpp \
-	src/espeak_command.cpp \
-	src/event.cpp \
-	src/fifo.cpp \
 	src/debug.cpp
 
 espeakedit_SOURCE = \
 common_SOURCE += src/sonic.cpp
 endif
 
+if OPT_ASYNC
+libespeak_FLAGS  += -DUSE_ASYNC
+libespeak_SOURCE += \
+	src/espeak_command.cpp \
+	src/event.cpp \
+	src/fifo.cpp
+endif
+
 if AUDIO_RUNTIME
 wave_SOURCE = src/wave.cpp src/wave_pulse.cpp
 wave_LIBS   = -lpulse -lpulse-simple -lportaudio
 lib_LTLIBRARIES += src/libespeak.la
 
 src_libespeak_la_LDFLAGS  = -version-info $(SHARED_VERSION) $(wave_LIBS) -lpthread
-src_libespeak_la_CXXFLAGS = $(common_FLAGS) $(wave_FLAGS) \
+src_libespeak_la_CXXFLAGS = $(common_FLAGS) $(libespeak_FLAGS) $(wave_FLAGS) \
 	-fpic -fvisibility=hidden -D LIBRARY \
 	-pedantic -fno-exceptions -D PATH_ESPEAK_DATA=\"$(DATADIR)\"
 src_libespeak_la_SOURCES  = $(common_SOURCE) $(libespeak_SOURCE) $(wave_SOURCE)
 bin_PROGRAMS += src/espeakedit
 
 src_espeakedit_LDFLAGS  = $(wave_LIBS) ${WX_LIBS}
-src_espeakedit_CXXFLAGS = ${WX_CXXFLAGS} $(common_FLAGS) $(wave_FLAGS) \
+src_espeakedit_CXXFLAGS = ${WX_CXXFLAGS} $(common_FLAGS) $(libespeak_FLAGS) $(wave_FLAGS) \
 	-D_LARGEFILE_SOURCE=1 -DNO_GCC_PRAGMA -D_ESPEAKEDIT
 src_espeakedit_SOURCES  = $(common_SOURCE) $(libespeak_SOURCE) $(espeakedit_SOURCE) $(wave_SOURCE)
 

configure.ac

 	have_sonic=yes
 fi
 
+AC_ARG_WITH([async],
+    [AS_HELP_STRING([--with-async], [enable support for async command processing @<:@default=yes@:>@])],
+    [])
+
+if test "$with_async" = "no" ; then
+	have_async=no
+else
+	have_async=yes
+fi
+
 AM_CONDITIONAL(OPT_KLATT,  [test x"$have_klatt"  = xyes])
 AM_CONDITIONAL(OPT_MBROLA, [test x"$have_mbrola" = xyes])
 AM_CONDITIONAL(OPT_SONIC,  [test x"$have_sonic"  = xyes])
+AM_CONDITIONAL(OPT_ASYNC,  [test x"$have_async"  = xyes])
 
 dnl ================================================================
 dnl wxWidgets checks.
 	Klatt:                         ${have_klatt}
 	MBROLA:                        ${have_mbrola}
 	Sonic:                         ${have_sonic}
+	Async:                         ${have_async}
 ])

src/espeak_command.cpp

 /***************************************************************************
  *   Copyright (C) 2007, Gilles Casse <[email protected]>                  *
+ *   Copyright (C) 2013 Reece H. Dunn                                      *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   Free Software Foundation, Inc.,                                       *
  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  ***************************************************************************/
-#include "speech.h"
 
-#ifdef USE_ASYNC
 // This source file is only used for asynchronious modes
 
+#include "speech.h"
 #include "espeak_command.h"
 #include <stdlib.h>
 #include <string.h>
     }
 #endif
 }
-
-#endif
 //>

src/event.cpp

 /***************************************************************************
  *   Copyright (C) 2007, Gilles Casse <[email protected]>                  *
+ *   Copyright (C) 2013 Reece H. Dunn                                      *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  ***************************************************************************/
 
-#include "speech.h"
-
-#ifdef USE_ASYNC
 // This source file is only used for asynchronious modes
 
 
 #include <sys/time.h>
 #include <errno.h>
 
+#include "speech.h"
 #include "speak_lib.h"
 #include "event.h"
 #include "wave.h"
 		init(); // purge event
 	}
 }
-
-#endif
 //>
-

src/fifo.cpp

 /***************************************************************************
  *   Copyright (C) 2007, Gilles Casse <[email protected]>                  *
+ *   Copyright (C) 2013 Reece H. Dunn                                      *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   Free Software Foundation, Inc.,                                       *
  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  ***************************************************************************/
-#include "speech.h"
 
-#ifdef USE_ASYNC
 // This source file is only used for asynchronious modes
 
-
 //<includes
 
 #include <unistd.h>
 #include <sys/time.h>
 #include <time.h>
 
+#include "speech.h"
 #include "fifo.h"
 #include "wave.h"
 #include "debug.h"
 
   init(0); // purge fifo
 }
-
-#endif
 //>
-

src/speech.h

 #define __cdecl 
 //#define ESPEAK_API  extern "C"
 
-#ifdef LIBRARY
-#define USE_ASYNC
-#endif
-
 #ifdef _ESPEAKEDIT
-#define USE_ASYNC
 #define LOG_FRAMES      // write keyframe info to log-espeakedit
 #endif