error: libraries\GSM\src/GSM.h

Me sale este error cuando compilo mi programa, deseo monitorear temperatura de manera remota con Arduino uno, sim900 y el sensor de temperatura DTH22:

In file included from D:\USUARIO\DOCUMENTOS\Arduino\libraries\GSM\src/GSM.h:46:0, from C:\Documents and Settings\Administrador\Escritorio\EjemploGSM_thingspeak_VERDADERO\EjemploGSM_thingspeak_VERDADERO.ino:1: D:\USUARIO\DOCUMENTOS\Arduino\libraries\GSM\src/GSM3ShieldV1BandManagement.h:49:125: warning: 'typedef' was ignored in this declaration typedef enum GSM3GSMBand {UNDEFINED, EGSM_MODE, DCS_MODE, PCS_MODE, EGSM_DCS_MODE, GSM850_PCS_MODE, GSM850_EGSM_DCS_PCS_MODE}; ^ C:\Documents and Settings\Administrador\Escritorio\EjemploGSM_thingspeak_VERDADERO\EjemploGSM_thingspeak_VERDADERO.ino: In function 'void setup()': C:\Documents and Settings\Administrador\Escritorio\EjemploGSM_thingspeak_VERDADERO\EjemploGSM_thingspeak_VERDADERO.ino:39:36: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings] if((gsmAccess.begin(PINNUMBER)==GSM_READY)&& ^ C:\Documents and Settings\Administrador\Escritorio\EjemploGSM_thingspeak_VERDADERO\EjemploGSM_thingspeak_VERDADERO.ino:40:63: warning: deprecated conversion from string constant to 'char*' -Wwrite-strings){ ^ C:\Documents and Settings\Administrador\Escritorio\EjemploGSM_thingspeak_VERDADERO\EjemploGSM_thingspeak_VERDADERO.ino:40:63: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings] C:\Documents and Settings\Administrador\Escritorio\EjemploGSM_thingspeak_VERDADERO\EjemploGSM_thingspeak_VERDADERO.ino:40:63: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings] El Sketch usa 23510 bytes (72%) del espacio de almacenamiento de programa

In file included from D:\USUARIO\DOCUMENTOS\Arduino\libraries\GSM\src/GSM.h:46:0, from C:\Documents and Settings\Administrador\Escritorio\EjemploGSM_thingspeak_VERDADERO\EjemploGSM_thingspeak_VERDADERO.ino:1: D:\USUARIO\DOCUMENTOS\Arduino\libraries\GSM\src/GSM3ShieldV1BandManagement.h:49:125: warning: 'typedef' was ignored in this declaration typedef enum GSM3GSMBand {UNDEFINED, EGSM_MODE, DCS_MODE, PCS_MODE, EGSM_DCS_MODE, GSM850_PCS_MODE, GSM850_EGSM_DCS_PCS_MODE}; ^ C:\Documents and Settings\Administrador\Escritorio\EjemploGSM_thingspeak_VERDADERO\EjemploGSM_thingspeak_VERDADERO.ino: In function 'void setup()': C:\Documents and Settings\Administrador\Escritorio\EjemploGSM_thingspeak_VERDADERO\EjemploGSM_thingspeak_VERDADERO.ino:39:36: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings] if((gsmAccess.begin(PINNUMBER)==GSM_READY)&& ^ C:\Documents and Settings\Administrador\Escritorio\EjemploGSM_thingspeak_VERDADERO\EjemploGSM_thingspeak_VERDADERO.ino:40:63: warning: deprecated conversion from string constant to 'char*' -Wwrite-strings){ ^ C:\Documents and Settings\Administrador\Escritorio\EjemploGSM_thingspeak_VERDADERO\EjemploGSM_thingspeak_VERDADERO.ino:40:63: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings] C:\Documents and Settings\Administrador\Escritorio\EjemploGSM_thingspeak_VERDADERO\EjemploGSM_thingspeak_VERDADERO.ino:40:63: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings] El Sketch usa 23510 bytes (72%) del espacio de almacenamiento de programa

Where did YOU see "error"?