add configure options to disable optional features

configure.ac

@@ -77,23 +77,36 @@ AC_CHECK_HEADER([alloca.h], [CPPFLAGS="$CPPFLAGS -DHAVE_ALLOCA_H"])
 dnl ######################
 dnl checking for alsa dev
 dnl ######################
-AC_CHECK_LIB(asound, snd_pcm_open, have_alsa=yes, have_alsa=no)
+AC_ARG_ENABLE([input_alsa],
+  AS_HELP_STRING([--disable-input-alsa],
+    [do not include support for input from alsa streams])
+)
+
+AS_IF([test "x$enable_input_alsa" != "xno"], [
+  AC_CHECK_LIB(asound, snd_pcm_open, have_alsa=yes, have_alsa=no)
   if [[ $have_alsa = "yes" ]] ; then
     LIBS="$LIBS -lasound"
     CPPFLAGS="$CPPFLAGS -DALSA"
   fi
-
   if [[ $have_alsa = "no" ]] ; then
     AC_MSG_NOTICE([WARNING: No alsa dev files found building without alsa support])
-    fi
+  fi],
+  [have_alsa=no]
+)
 
-    AM_CONDITIONAL([ALSA], [test x$have_alsa = xyes])
+AM_CONDITIONAL([ALSA], [test "x$have_alsa" = "xyes"])
 
 
 dnl ######################
 dnl checking for pulse dev
 dnl ######################
-AC_CHECK_LIB(pulse-simple, pa_simple_new, have_pulse=yes, have_pulse=no)
+AC_ARG_ENABLE([input_pulse],
+  AS_HELP_STRING([--disable-input-pulse],
+    [do not include support for input from pulseaudio])
+)
+
+AS_IF([test "x$enable_input_pulse" != "xno"], [
+  AC_CHECK_LIB(pulse-simple, pa_simple_new, have_pulse=yes, have_pulse=no)
   if [[ $have_pulse = "yes" ]] ; then
     LIBS="$LIBS -lpulse-simple -lpulse"
     CPPFLAGS="$CPPFLAGS -DPULSE"
@@ -101,14 +114,22 @@ AC_CHECK_LIB(pulse-simple, pa_simple_new, have_pulse=yes, have_pulse=no)
 
   if [[ $have_pulse = "no" ]] ; then
     AC_MSG_NOTICE([WARNING: No pusleaudio dev files found building without pulseaudio support])
-    fi
+  fi],
+  [have_pulse=no]
+)
 
-    AM_CONDITIONAL([PULSE], [test x$have_pulse = xyes])
+AM_CONDITIONAL([PULSE], [test "x$have_pulse" = "xyes"])
 
 dnl ######################
 dnl checking for portaudio dev
 dnl ######################
-AC_CHECK_LIB(portaudio, Pa_Initialize, have_portaudio=yes, have_portaudio=no)
+AC_ARG_ENABLE([input_portaudio],
+  AS_HELP_STRING([--disable-input-portaudio],
+    [do not include support for input from portaudio])
+)
+
+AS_IF([test "x$enable_input_portaudio" != "xno"], [
+  AC_CHECK_LIB(portaudio, Pa_Initialize, have_portaudio=yes, have_portaudio=no)
   if [[ $have_portaudio = "yes" ]] ; then
     LIBS="$LIBS -lportaudio"
     CPPFLAGS="$CPPFLAGS -DPORTAUDIO"
@@ -116,14 +137,22 @@ AC_CHECK_LIB(portaudio, Pa_Initialize, have_portaudio=yes, have_portaudio=no)
 
   if [[ $have_portaudio = "no" ]] ; then
     AC_MSG_NOTICE([WARNING: No portaudio dev files found building without portaudio support])
-    fi
+  fi],
+  [have_portaudio=no]
+)
 
-    AM_CONDITIONAL([PORTAUDIO], [test x$have_portaudio = xyes])
+AM_CONDITIONAL([PORTAUDIO], [test "x$have_portaudio" = "xyes"])
 
 dnl ######################
 dnl checking for sndio dev
 dnl ######################
-AC_CHECK_LIB(sndio, sio_open, have_sndio=yes, have_sndio=no)
+AC_ARG_ENABLE([input_sndio],
+  AS_HELP_STRING([--disable-input-sndio],
+    [do not include support for input from sndio])
+)
+
+AS_IF([test "x$enable_input_sndio" != "xno"], [
+  AC_CHECK_LIB(sndio, sio_open, have_sndio=yes, have_sndio=no)
   if [[ $have_sndio = "yes" ]] ; then
     LIBS="$LIBS -lsndio"
     CPPFLAGS="$CPPFLAGS -DSNDIO"
@@ -131,9 +160,11 @@ AC_CHECK_LIB(sndio, sio_open, have_sndio=yes, have_sndio=no)
 
   if [[ $have_sndio = "no" ]] ; then
     AC_MSG_NOTICE([WARNING: No sndio dev files found building without sndio support])
-    fi
+  fi],
+  [have_portaudio=no]
+)
 
-    AM_CONDITIONAL([SNDIO], [test x$have_sndio = xyes])
+AM_CONDITIONAL([SNDIO], [test "x$have_sndio" = "xyes"])
 
 dnl ######################
 dnl checking for math lib
@@ -163,15 +194,21 @@ AC_CHECK_LIB(fftw3,fftw_execute, have_fftw=yes, have_fftw=no)
 dnl ######################
 dnl checking for ncursesw
 dnl ######################
-curses_config_bin="ncursesw6-config ncursesw5-config"
+AC_ARG_ENABLE([output_ncurses],
+  AS_HELP_STRING([--disable-output-ncurses],
+    [do not include support for output with ncurses])
+)
+
+AS_IF([test "x$enable_output_ncurses" != "xno"], [
+  curses_config_bin="ncursesw6-config ncursesw5-config"
 
-AC_PATH_PROGS(CURSES_CONFIG, $curses_config_bin)
+  AC_PATH_PROGS(CURSES_CONFIG, $curses_config_bin)
 
-AC_CHECK_LIB(ncursesw, initscr,
+  AC_CHECK_LIB(ncursesw, initscr,
     curses_lib=ncursesw
-)
+  )
 
-AC_CHECK_LIB($curses_lib, initscr,
+  AC_CHECK_LIB($curses_lib, initscr,
     if test "$CURSES_CONFIG" = "" ; then
       LIBS="$LIBS -l$curses_lib"
       CPPFLAGS="$CPPFLAGS -DNCURSES"
@@ -180,24 +217,39 @@ AC_CHECK_LIB($curses_lib, initscr,
       CPPFLAGS="$CPPFLAGS `$CURSES_CONFIG --cflags` -DNCURSES"
       LIBS="$LIBS `$CURSES_CONFIG --libs`"
     fi
+
     AC_CHECK_HEADERS([curses.h], , AC_MSG_ERROR([missing curses.h header]))
-	AM_CONDITIONAL([NCURSES], [true])
+    have_ncurses=yes,
-	,
+
     AC_MSG_NOTICE([WARNING: building without ncursesw support ncursesw is recomended!])
-	AM_CONDITIONAL([NCURSES], [false])
+    have_ncurses=no
-	)
+  )],
+  [have_ncurses=no]
+)
 
+AM_CONDITIONAL([NCURSES], [test "x$have_ncurses" = "xyes"])
 
 
 dnl ######################
 dnl checking for system iniparser
 dnl ######################
 
-AC_SEARCH_LIBS([iniparser_load], [iniparser], [
+AC_ARG_ENABLE([system_iniparser],
+  AS_HELP_STRING([--disable-system-iniparser],
+    [do not use system iniparser library (use bundled iniparser library)])
+)
+
+AS_IF([test "x$enable_system_iniparser" != "xno"], [
+  AC_SEARCH_LIBS([iniparser_load], [iniparser], [
     AC_CHECK_HEADERS([iniparser.h], [have_system_iniparser=yes])
-])
+    ])
+  ],
+  [have_system_iniparser=no]
+)
+
 AM_CONDITIONAL([SYSTEM_LIBINIPARSER], [test "x$have_system_iniparser" = "xyes"])
-	if test "x$have_system_iniparser" = "xyes"; then
+
+if test "x$have_system_iniparser" = "xyes"; then
   AC_SUBST(SYSTEM_LIBINIPARSER, 1)
   AC_MSG_NOTICE([Using installed iniparser])
   LIBS="$LIBS -liniparser"
@@ -208,12 +260,11 @@ AM_CONDITIONAL([SYSTEM_LIBINIPARSER], [test "x$have_system_iniparser" = "xyes"])
     [AC_MSG_RESULT(iniparser > 3.2 test OK)],
     [AC_MSG_RESULT(iniparser > 3.2 test failed falling back to legacy iniparser mode)
     CPPFLAGS="$CPPFLAGS -DLEGACYINIPARSER"])
-
+else
-	else
   AC_SUBST(SYSTEM_LIBINIPARSER, 0)
   AC_CONFIG_FILES(iniparser/Makefile)
   AC_MSG_NOTICE([Building iniparser])
-	fi
+fi
 
 
 dnl ############################