config.h usage cleanups.

- Drop config.h #include from files that don't actually use any of
   its contents (at the moment).

 - Add comment for those that do need it.

backend.c

@@ -19,6 +19,7 @@
  */
 
 #include <glib.h>
+#include "config.h" /* Needed for HAVE_LIBUSB_1_0 and others. */
 #include "libsigrok.h"
 #include "libsigrok-internal.h"
 

device.c

@@ -19,6 +19,7 @@
 
 #include <stdio.h>
 #include <glib.h>
+#include "config.h" /* Needed for HAVE_LIBUSB_1_0 and others. */
 #include "libsigrok.h"
 #include "libsigrok-internal.h"
 

hardware/agilent-dmm/api.c

@@ -20,7 +20,6 @@
 #include <glib.h>
 #include "libsigrok.h"
 #include "libsigrok-internal.h"
-#include "config.h"
 #include "agilent-dmm.h"
 #include <sys/types.h>
 #include <sys/stat.h>

hardware/agilent-dmm/sched.c

@@ -20,7 +20,6 @@
 #include <glib.h>
 #include "libsigrok.h"
 #include "libsigrok-internal.h"
-#include "config.h"
 #include "agilent-dmm.h"
 #include <stdlib.h>
 #include <string.h>

hardware/fluke-dmm/api.c

@@ -20,7 +20,6 @@
 #include <glib.h>
 #include "libsigrok.h"
 #include "libsigrok-internal.h"
-#include "config.h"
 #include "fluke-dmm.h"
 #include <sys/types.h>
 #include <sys/stat.h>

hardware/fluke-dmm/fluke.c

@@ -20,7 +20,6 @@
 #include <glib.h>
 #include "libsigrok.h"
 #include "libsigrok-internal.h"
-#include "config.h"
 #include "fluke-dmm.h"
 #include <stdlib.h>
 #include <math.h>

hardware/fx2lafw/fx2lafw.c

@@ -23,7 +23,6 @@
 #include <string.h>
 #include <inttypes.h>
 #include <libusb.h>
-#include "config.h"
 #include "libsigrok.h"
 #include "libsigrok-internal.h"
 #include "fx2lafw.h"

hardware/hantek-dso/api.c

@@ -31,7 +31,6 @@
 #include <libusb.h>
 #include "libsigrok.h"
 #include "libsigrok-internal.h"
-#include "config.h"
 #include "dso.h"
 
 

hardware/hantek-dso/dso.c

@@ -21,7 +21,6 @@
 
 #include "libsigrok.h"
 #include "libsigrok-internal.h"
-#include "config.h"
 #include "dso.h"
 #include <string.h>
 #include <glib.h>

hardware/radioshack-dmm/api.c

@@ -21,7 +21,6 @@
 #include <glib.h>
 #include "libsigrok.h"
 #include "libsigrok-internal.h"
-#include "config.h"
 #include "radioshack-dmm.h"
 #include <sys/types.h>
 #include <sys/stat.h>

hardware/radioshack-dmm/radioshack.c

@@ -21,7 +21,6 @@
 #include <glib.h>
 #include "libsigrok.h"
 #include "libsigrok-internal.h"
-#include "config.h"
 #include "radioshack-dmm.h"
 #include <stdlib.h>
 #include <math.h>

hardware/zeroplus-logic-cube/zeroplus.c

@@ -24,7 +24,6 @@
 #include <inttypes.h>
 #include <glib.h>
 #include <libusb.h>
-#include "config.h"
 #include "libsigrok.h"
 #include "libsigrok-internal.h"
 #include "analyzer.h"

hwdriver.c

@@ -23,6 +23,7 @@
 #include <dirent.h>
 #include <string.h>
 #include <glib.h>
+#include "config.h" /* Needed for HAVE_LIBUSB_1_0 and others. */
 #include "libsigrok.h"
 #include "libsigrok-internal.h"
 

libsigrok-internal.h

@@ -96,8 +96,8 @@ SR_PRIV struct sr_probe *sr_probe_new(int index, int type,
 SR_PRIV struct sr_dev_inst *sr_dev_inst_new(int index, int status,
 		const char *vendor, const char *model, const char *version);
 SR_PRIV void sr_dev_inst_free(struct sr_dev_inst *sdi);
-#ifdef HAVE_LIBUSB_1_0
 
+#ifdef HAVE_LIBUSB_1_0
 /* USB-specific instances */
 SR_PRIV struct sr_usb_dev_inst *sr_usb_dev_inst_new(uint8_t bus,
 		uint8_t address, struct libusb_device_handle *hdl);

output/analog.c

@@ -20,7 +20,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <glib.h>
-#include "config.h"
 #include "libsigrok.h"
 #include "libsigrok-internal.h"
 #include <math.h>

output/csv.c

@@ -21,7 +21,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <glib.h>
-#include "config.h"
+#include "config.h" /* Needed for PACKAGE_STRING and others. */
 #include "libsigrok.h"
 #include "libsigrok-internal.h"
 

output/float.c

@@ -20,7 +20,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <glib.h>
-#include "config.h"
 #include "libsigrok.h"
 #include "libsigrok-internal.h"
 

output/gnuplot.c

@@ -21,7 +21,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <glib.h>
-#include "config.h"
+#include "config.h" /* Needed for PACKAGE_STRING and others. */
 #include "libsigrok.h"
 #include "libsigrok-internal.h"
 

output/text/text.c

@@ -22,7 +22,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <glib.h>
-#include "config.h"
+#include "config.h" /* Needed for PACKAGE_STRING and others. */
 #include "libsigrok.h"
 #include "libsigrok-internal.h"
 #include "text.h"

output/vcd.c

@@ -22,7 +22,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <glib.h>
-#include "config.h"
+#include "config.h" /* Needed for PACKAGE and others. */
 #include "libsigrok.h"
 #include "libsigrok-internal.h"
 

session_file.c

@@ -23,7 +23,7 @@
 #include <zip.h>
 #include <glib.h>
 #include <glib/gstdio.h>
-#include "config.h"
+#include "config.h" /* Needed for PACKAGE_VERSION and others. */
 #include "libsigrok.h"
 #include "libsigrok-internal.h"