In file included from C:\Users\Minadine\Documents\Arduino\libraries\glcd/glcd.h:38:0,
                 from sketch_jan29a.ino:23:
C:\Users\Minadine\Documents\Arduino\libraries\glcd/fonts/SystemFont5x7.h:48:28: error: variable 'System5x7' must be const in order to be put into read-only section by means of '__attribute__((progmem))'
 static uint8_t System5x7[] PROGMEM = {
                            ^
C:\Users\Minadine\Documents\Arduino\libraries\glcd/fonts/Arial14.h:55:27: error: variable 'Arial_14' must be const in order to be put into read-only section by means of '__attribute__((progmem))'
 static uint8_t Arial_14[] PROGMEM = {
                           ^
C:\Users\Minadine\Documents\Arduino\libraries\glcd/fonts/Arial_bold_14.h:48:32: error: variable 'Arial_bold_14' must be const in order to be put into read-only section by means of '__attribute__((progmem))'
 static uint8_t Arial_bold_14[] PROGMEM = {
                                ^
C:\Users\Minadine\Documents\Arduino\libraries\glcd/fonts/Corsiva_12.h:48:29: error: variable 'Corsiva_12' must be const in order to be put into read-only section by means of '__attribute__((progmem))'
 static uint8_t Corsiva_12[] PROGMEM = {
                             ^
C:\Users\Minadine\Documents\Arduino\libraries\glcd/fonts/Verdana_digits_24.h:49:28: error: variable 'Verdana24' must be const in order to be put into read-only section by means of '__attribute__((progmem))'
 static uint8_t Verdana24[] PROGMEM = {
                            ^
C:\Users\Minadine\Documents\Arduino\libraries\glcd/fonts/fixednums7x15.h:21:32: error: variable 'fixednums7x15' must be const in order to be put into read-only section by means of '__attribute__((progmem))'
 static uint8_t fixednums7x15[] PROGMEM = {
                                ^
C:\Users\Minadine\Documents\Arduino\libraries\glcd/fonts/fixednums8x16.h:26:32: error: variable 'fixednums8x16' must be const in order to be put into read-only section by means of '__attribute__((progmem))'
 static uint8_t fixednums8x16[] PROGMEM = {
                                ^
C:\Users\Minadine\Documents\Arduino\libraries\glcd/fonts/fixednums15x31.h:23:33: error: variable 'fixednums15x31' must be const in order to be put into read-only section by means of '__attribute__((progmem))'
 static uint8_t fixednums15x31[] PROGMEM = {
                                 ^
C:\Users\Minadine\Documents\Arduino\libraries\glcd/imagem.h:9:26: error: variable 'arduino' must be const in order to be put into read-only section by means of '__attribute__((progmem))'
 static uint8_t arduino[] PROGMEM = {
                          ^
C:\Users\Minadine\Documents\Arduino\libraries\glcd/imagem.h:27:27: error: variable 'logoblog' must be const in order to be put into read-only section by means of '__attribute__((progmem))'
 static uint8_t logoblog[] PROGMEM = {
                           ^
Error compiling.