diff --git a/CMakeLists.txt b/CMakeLists.txt
index 326aaab..f8448ce 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,8 +1,8 @@
 PROJECT(libnfc C)
 CMAKE_MINIMUM_REQUIRED(VERSION 2.6)
 SET(VERSION_MAJOR "1")
-SET(VERSION_MINOR "2")
-SET(VERSION_PATCH "1")
+SET(VERSION_MINOR "3")
+SET(VERSION_PATCH "0")
 
 SET(VERSION "${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH}")
 
@@ -14,10 +14,9 @@ CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/config.h.cmake ${CMAKE_CURRENT_SOURCE
 # make it easy to locate CMake modules for finding libraries
 SET(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake_modules/")
 
-SET(LIBNFC_VERBOSE_OUTPUT OFF CACHE BOOL "Verbose output of communication with the NFC chip")
-SET(LIBNFC_LANG_C99 OFF CACHE BOOL "Use C99 language standard (GCC only)")
+SET(LIBNFC_DEBUG_OUTPUT OFF CACHE BOOL "Debug output of communication with the NFC chip")
 SET(LIBNFC_PCSC ON CACHE BOOL "Enable PC/SC support (ACR122)")
-SET(LIBNFC_USB OFF CACHE BOOL "Enable direct USB communication support (PN531 and PN533)")
+SET(LIBNFC_USB ON CACHE BOOL "Enable direct USB communication support (PN531 and PN533)")
 SET(LIBNFC_DISABLE_SERIAL_AUTOPROBE OFF CACHE BOOL "Disable serial autoprobe")
 
 IF(DEFINED CMAKE_INSTALL_LIBDIR)
@@ -38,6 +37,12 @@ IF(NOT DEFINED SHARE_INSTALL_PREFIX)
   SET(SHARE_INSTALL_PREFIX share)
 ENDIF(NOT DEFINED SHARE_INSTALL_PREFIX)
 
+IF(LIBNFC_DEBUG_OUTPUT)
+  ADD_DEFINITIONS(-DDEBUG -g3)
+ENDIF(LIBNFC_DEBUG_OUTPUT)
+
+ADD_DEFINITIONS(-Wall -pedantic -std=c99)
+
 IF(NOT MSVC)
   # Set some pkg-config variables
   SET(prefix ${CMAKE_INSTALL_PREFIX})
diff --git a/src/examples/nfc-emulate.c b/src/examples/nfc-emulate.c
index b208784..28ab002 100644
--- a/src/examples/nfc-emulate.c
+++ b/src/examples/nfc-emulate.c
@@ -67,7 +67,7 @@ int main(int argc, char *argv[])
       print_usage(argv);
       return 0;
     } else if (0 == strcmp(argv[arg], "-q")) {
-      INFO("Quiet mode.");
+      INFO("%s", "Quiet mode.");
       quiet_output = true;
     } else if((arg == argc-1) && (strlen(argv[arg]) == 8)) { // See if UID was specified as HEX string
       byte_t abtTmp[3] = { 0x00,0x00,0x00 };
diff --git a/src/examples/nfc-relay.c b/src/examples/nfc-relay.c
index 04b520b..5988689 100644
--- a/src/examples/nfc-relay.c
+++ b/src/examples/nfc-relay.c
@@ -70,7 +70,7 @@ int main(int argc,char* argv[])
       print_usage(argv);
       return 0;
     } else if (0 == strcmp(argv[arg], "-q")) {
-      INFO("Quiet mode.");
+      INFO("%s", "Quiet mode.");
       quiet_output = true;
     } else {
       ERR("%s is not supported option.", argv[arg]);
diff --git a/src/lib/drivers/acr122.c b/src/lib/drivers/acr122.c
index f9f4e6b..8d9c81f 100644
--- a/src/lib/drivers/acr122.c
+++ b/src/lib/drivers/acr122.c
@@ -136,7 +136,6 @@ acr122_list_devices(nfc_device_desc_t pnddDevices[], size_t szDevices, size_t *p
   size_t szDeviceNamesLen = sizeof(acDeviceNames);
   acr122_spec_t as;
   uint32_t uiBusIndex = 0;
-  char *pcFirmware;
   SCARDCONTEXT *pscc;
 
   // Clear the reader list