Fix build with CMake

- Fix library finding ('nfc' instead of 'libnfc');
- Generate config.h from template on non-win32 platforms;
- While here, include protection for config.h in several files.

examples/felica-read-ndef.c

@@ -15,7 +15,9 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>
  */
 
-#include "config.h"
+#if defined(HAVE_CONFIG_H)
+#  include "config.h"
+#endif
 
 #include <ctype.h>
 #include <err.h>

examples/mifare-classic-format.c

@@ -16,7 +16,9 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>
  */
 
-#include "config.h"
+#if defined(HAVE_CONFIG_H)
+#  include "config.h"
+#endif
 
 #include <err.h>
 #include <errno.h>

examples/mifare-classic-read-ndef.c

@@ -30,7 +30,9 @@
  *   Document Identifier 130410
  */
 
-#include "config.h"
+#if defined(HAVE_CONFIG_H)
+#  include "config.h"
+#endif
 
 #include <err.h>
 #include <errno.h>

examples/mifare-classic-write-ndef.c

@@ -15,7 +15,9 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>
  */
 
-#include "config.h"
+#if defined(HAVE_CONFIG_H)
+#  include "config.h"
+#endif
 
 #include <err.h>
 #include <errno.h>

examples/mifare-desfire-create-ndef.c

@@ -15,7 +15,9 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>
  */
 
-#include "config.h"
+#if defined(HAVE_CONFIG_H)
+#  include "config.h"
+#endif
 
 #include <err.h>
 #include <stdlib.h>

examples/mifare-desfire-ev1-configure-ats.c

@@ -15,7 +15,9 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>
  */
 
-#include "config.h"
+#if defined(HAVE_CONFIG_H)
+#  include "config.h"
+#endif
 
 #include <err.h>
 #include <errno.h>

examples/mifare-desfire-ev1-configure-default-key.c

@@ -15,7 +15,9 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>
  */
 
-#include "config.h"
+#if defined(HAVE_CONFIG_H)
+#  include "config.h"
+#endif
 
 #include <err.h>
 #include <errno.h>

examples/mifare-desfire-ev1-configure-random-uid.c

@@ -15,7 +15,9 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>
  */
 
-#include "config.h"
+#if defined(HAVE_CONFIG_H)
+#  include "config.h"
+#endif
 
 #include <err.h>
 #include <errno.h>

examples/mifare-desfire-format.c

@@ -15,7 +15,9 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>
  */
 
-#include "config.h"
+#if defined(HAVE_CONFIG_H)
+#  include "config.h"
+#endif
 
 #include <err.h>
 #include <errno.h>

examples/mifare-desfire-read-ndef.c

@@ -15,7 +15,9 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>
  */
 
-#include "config.h"
+#if defined(HAVE_CONFIG_H)
+#  include "config.h"
+#endif
 
 #include <err.h>
 #include <stdlib.h>

examples/mifare-desfire-write-ndef.c

@@ -15,7 +15,9 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>
  */
 
-#include "config.h"
+#if defined(HAVE_CONFIG_H)
+#  include "config.h"
+#endif
 
 #include <err.h>
 #include <stdlib.h>