Move most alsa-lib logic to Makefiles

configure.ac

@@ -3681,7 +3681,19 @@ PKG_ENABLE_MODULES_VLC([PORTAUDIO], [], [portaudio-2.0], [Portaudio library supp
 dnl
 dnl  ALSA module
 dnl
-PKG_ENABLE_MODULES_VLC([ALSA], [alsa access_alsa], [alsa >= 1.0.0], [Alsa sound support for linux], [auto])
+AC_ARG_ENABLE(alsa,
+  [  --enable-alsa           Advanced Linux Sound Architecture (default auto)])
+have_alsa="no"
+AS_IF([test "${enable_alsa}" != "no"], [
+  PKG_CHECK_MODULES([ALSA], [alsa >= 1.0.0], [
+    have_alsa="yes"
+  ], [
+    AS_IF([test "x${enable_alsa}" != "x"], [
+      AC_MSG_ERROR([alsa-lib not found])
+    ])
+  ])
+])
+AM_CONDITIONAL([HAVE_ALSA], [test "${have_alsa}" = "yes"])
 
 dnl
 dnl  win32 waveOut plugin

modules/access/Modules.am

@@ -45,7 +45,6 @@ SOURCES_cdda = \
         vcd/cdrom_internals.h \
         $(NULL)
 SOURCES_access_jack = jack.c
-SOURCES_access_alsa = alsa.c
 SOURCES_access_oss = oss.c
 SOURCES_access_mtp = mtp.c
 SOURCES_access_sftp = sftp.c
@@ -78,6 +77,14 @@ libvlc_LTLIBRARIES += \
 	libstream_filter_rar_plugin.la \
 	$(NULL)
 
+libaccess_alsa_plugin_la_SOURCES = alsa.c
+libaccess_alsa_plugin_la_CFLAGS = $(AM_CFLAGS) $(ALSA_CFLAGS)
+libaccess_alsa_plugin_la_LIBADD = $(AM_LIBADD) $(ALSA_LIBS)
+libaccess_alsa_plugin_la_DEPENDENCIES =
+if HAVE_ALSA
+libvlc_LTLIBRARIES += libaccess_alsa_plugin.la
+endif
+
 libxcb_screen_plugin_la_SOURCES = screen/xcb.c
 libxcb_screen_plugin_la_CFLAGS = $(AM_CFLAGS) \
 	$(XCB_CFLAGS)

modules/audio_output/Modules.am

-SOURCES_alsa = alsa.c
 SOURCES_aout_directx = directx.c windows_audio_common.h
 SOURCES_aout_file = file.c
 SOURCES_oss = oss.c
@@ -11,3 +10,11 @@ SOURCES_jack = jack.c
 SOURCES_pulse = pulse.c
 
 libvlc_LTLIBRARIES += libaout_file_plugin.la
+
+libalsa_plugin_la_SOURCES = alsa.c
+libalsa_plugin_la_CFLAGS = $(AM_CFLAGS) $(ALSA_CFLAGS)
+libalsa_plugin_la_LIBADD = $(AM_LIBADD) $(ALSA_LIBS)
+libalsa_plugin_la_DEPENDENCIES =
+if HAVE_ALSA
+libvlc_LTLIBRARIES += libalsa_plugin.la
+endif