Check libsamplerate as critical and use HAVE_SRC

Makefile

@@ -4,13 +4,19 @@ TARGET = ssnes
 
 OBJ = ssnes.o file.o driver.o conf/config_file.o settings.o dynamic.o
 
-LIBS = -lsamplerate
+LIBS =
 DEFINES =
 
+ifeq ($(HAVE_SRC), 1)
+   LIBS += $(SRC_LIBS)
+   DEFINES += $(SRC_CFLAGS)
+endif
+
 ifeq ($(HAVE_RSOUND), 1)
    OBJ += audio/rsound.o
    LIBS += -lrsound
 endif
+
 ifeq ($(HAVE_OSS), 1)
    OBJ += audio/oss.o
 endif

config.def.h

@@ -27,7 +27,10 @@
 #include "libsnes.hpp"
 #include "driver.h"
 #include "config.h"
+
+#ifdef HAVE_SRC
 #include <samplerate.h>
+#endif
 
 
 ///////////////// Drivers

general.h

@@ -20,11 +20,13 @@
 #define __SSNES_GENERAL_H
 
 #include <stdbool.h>
-#include <samplerate.h>
 #include "driver.h"
 #include <stdio.h>
 #include "record/ffemu.h"
 #include "config.h"
+#ifdef HAVE_SRC
+#include <samplerate.h>
+#endif
 
 
 #define MAX_PLAYERS 2

qb/config.libs.sh

@@ -32,12 +32,13 @@ if [ $HAVE_FFMPEG != no ]; then
    ( [ $HAVE_FFMPEG = auto ] && ( [ $HAVE_AVCODEC = no ] || [ $HAVE_AVFORMAT = no ] || [ $HAVE_AVCORE = no ] || [ $HAVE_AVUTIL = no ] || [ $HAVE_SWSCALE = no ] ) && HAVE_FFMPEG=no ) || HAVE_FFMPEG=yes
 fi
 
-check_lib SRC -lsamplerate src_callback_new
+check_pkgconf SRC samplerate
+check_critical SRC "Cannot find libsamplerate."
 
 check_lib DYNAMIC -ldl dlopen
 
 # Creates config.mk and config.h.
-VARS="ALSA OSS AL RSOUND ROAR JACK SDL FILTER CG XML DYNAMIC FFMPEG AVCODEC AVFORMAT AVCORE AVUTIL SWSCALE"
+VARS="ALSA OSS AL RSOUND ROAR JACK SDL FILTER CG XML DYNAMIC FFMPEG AVCODEC AVFORMAT AVCORE AVUTIL SWSCALE SRC"
 create_config_make config.mk $VARS
 create_config_header config.h $VARS
 

ssnes.c

@@ -17,7 +17,6 @@
 
 
 #include <stdbool.h>
-#include <samplerate.h>
 #include <libsnes.hpp>
 #include <stdio.h>
 #include <stdlib.h>
@@ -30,6 +29,9 @@
 #include "dynamic.h"
 #include "record/ffemu.h"
 #include <assert.h>
+#ifdef HAVE_SRC
+#include <samplerate.h>
+#endif
 
 struct global g_extern = {
    .video_active = true,