script@server:~/pong$ gcc Pong.c
Pong.c:12:21: error: allegro.h: No such file or directory
Pong.c:15:18: error: pong.h: No such file or directory
Pong.c:24: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘*’ token
Pong.c:37: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘*’ token
Pong.c: In function ‘boing’:
Pong.c:53: error: ‘pong_datafile’ undeclared (first use in this function)
Pong.c:53: error: (Each undeclared identifier is reported only once
Pong.c:53: error: for each function it appears in.)
Pong.c:53: error: ‘pong_boing’ undeclared (first use in this function)
Pong.c: In function ‘move_ball’:
Pong.c:101: error: ‘SCREEN_W’ undeclared (first use in this function)
Pong.c:192: error: ‘buffer’ undeclared (first use in this function)
Pong.c:192: error: ‘pong_datafile’ undeclared (first use in this function)
Pong.c:192: error: ‘pong_ball’ undeclared (first use in this function)
Pong.c: In function ‘key_respond’:
Pong.c:209: error: ‘key’ undeclared (first use in this function)
Pong.c:209: error: ‘KEY_DOWN’ undeclared (first use in this function)
Pong.c:212: error: ‘KEY_UP’ undeclared (first use in this function)
Pong.c:221: error: ‘joy_down’ undeclared (first use in this function)
Pong.c:221: error: ‘KEY_Z’ undeclared (first use in this function)
Pong.c:224: error: ‘joy_up’ undeclared (first use in this function)
Pong.c:224: error: ‘KEY_A’ undeclared (first use in this function)
Pong.c:234: error: ‘buffer’ undeclared (first use in this function)
Pong.c:234: error: ‘pong_datafile’ undeclared (first use in this function)
Pong.c:234: error: ‘pong_bar’ undeclared (first use in this function)
Pong.c: In function ‘pong_game’:
Pong.c:253: error: ‘key’ undeclared (first use in this function)
Pong.c:253: error: ‘KEY_ESC’ undeclared (first use in this function)
Pong.c:261: error: ‘buffer’ undeclared (first use in this function)
Pong.c:261: error: ‘pong_datafile’ undeclared (first use in this function)
Pong.c:261: error: ‘pong_text’ undeclared (first use in this function)
Pong.c:273: error: ‘screen’ undeclared (first use in this function)
Pong.c: In function ‘main’:
Pong.c:300: error: ‘pong_datafile’ undeclared (first use in this function)
Pong.c:305: error: ‘allegro_error’ undeclared (first use in this function)
Pong.c:312: error: ‘DIGI_AUTODETECT’ undeclared (first use in this function)
Pong.c:312: error: ‘MIDI_AUTODETECT’ undeclared (first use in this function)
Pong.c:325: error: ‘GFX_AUTODETECT’ undeclared (first use in this function)
Pong.c:336: error: ‘pong_pal’ undeclared (first use in this function)
Pong.c:339: error: ‘buffer’ undeclared (first use in this function)
Pong.c:343: error: ‘SCREEN_W’ undeclared (first use in this function)
script@server:~/pong$     

script@server:~/pong$ gcc Pong.c
Pong.c: In function ‘pong_game’:
Pong.c:261: warning: ‘textout’ is deprecated (declared at /usr/include/allegro/alcompat.h:169)
Pong.c:262: warning: ‘textout’ is deprecated (declared at /usr/include/allegro/alcompat.h:169)
Pong.c:262: warning: passing argument 3 of ‘textout’ makes pointer from integer without a cast
Pong.c:263: warning: ‘textout’ is deprecated (declared at /usr/include/allegro/alcompat.h:169)
Pong.c:264: warning: ‘textout’ is deprecated (declared at /usr/include/allegro/alcompat.h:169)
Pong.c:264: warning: passing argument 3 of ‘textout’ makes pointer from integer without a cast
Pong.c:266: warning: ‘textout’ is deprecated (declared at /usr/include/allegro/alcompat.h:169)
Pong.c:267: warning: ‘textout’ is deprecated (declared at /usr/include/allegro/alcompat.h:169)
Pong.c: In function ‘_mangled_main’:
Pong.c:294: warning: ‘initialise_joystick’ is deprecated (declared at /usr/include/allegro/alcompat.h:127)
/tmp/ccjWlNnw.o: In function `boing’:
Pong.c:(.text+0x34): undefined reference to `play_sample’
/tmp/ccjWlNnw.o: In function `move_ball’:
Pong.c:(.text+0x1e3): undefined reference to `gfx_driver’
Pong.c:(.text+0x1ec): undefined reference to `gfx_driver’
Pong.c:(.text+0x2e7): undefined reference to `gfx_driver’
Pong.c:(.text+0x2f0): undefined reference to `gfx_driver’
Pong.c:(.text+0x3d1): undefined reference to `gfx_driver’
/tmp/ccjWlNnw.o:Pong.c:(.text+0x3da): more undefined references to `gfx_driver’ follow
/tmp/ccjWlNnw.o: In function `move_ball’:
Pong.c:(.text+0x544): undefined reference to `draw_rle_sprite’
/tmp/ccjWlNnw.o: In function `key_respond’:
Pong.c:(.text+0x555): undefined reference to `poll_joystick’
Pong.c:(.text+0x55c): undefined reference to `key’
Pong.c:(.text+0x57c): undefined reference to `key’
Pong.c:(.text+0x5cd): undefined reference to `joy’
Pong.c:(.text+0x5d8): undefined reference to `key’
Pong.c:(.text+0x5f6): undefined reference to `joy’
Pong.c:(.text+0x601): undefined reference to `key’
Pong.c:(.text+0x67b): undefined reference to `draw_rle_sprite’
Pong.c:(.text+0x6a9): undefined reference to `draw_rle_sprite’
/tmp/ccjWlNnw.o: In function `pong_game’:
Pong.c:(.text+0x707): undefined reference to `textout’
Pong.c:(.text+0x721): undefined reference to `text_length’
Pong.c:(.text+0x744): undefined reference to `itoa’
Pong.c:(.text+0x77a): undefined reference to `textout’
Pong.c:(.text+0x7b6): undefined reference to `textout’
Pong.c:(.text+0x7d0): undefined reference to `text_length’
Pong.c:(.text+0x7f3): undefined reference to `itoa’
Pong.c:(.text+0x829): undefined reference to `textout’
Pong.c:(.text+0x865): undefined reference to `textout’
Pong.c:(.text+0x87f): undefined reference to `text_length’
Pong.c:(.text+0x8c4): undefined reference to `textout’
Pong.c:(.text+0x8f9): undefined reference to `line’
Pong.c:(.text+0x8fe): undefined reference to `screen’
Pong.c:(.text+0x940): undefined reference to `blit’
Pong.c:(.text+0x954): undefined reference to `key’
/tmp/ccjWlNnw.o: In function `clear’:
Pong.c:(.text+0x973): undefined reference to `clear_bitmap’
/tmp/ccjWlNnw.o: In function `main’:
Pong.c:(.text+0x994): undefined reference to `__crt0_argc’
Pong.c:(.text+0x99c): undefined reference to `__crt0_argv’
/tmp/ccjWlNnw.o: In function `_mangled_main’:
Pong.c:(.text+0x9d9): undefined reference to `install_allegro’
Pong.c:(.text+0x9de): undefined reference to `install_timer’
Pong.c:(.text+0x9e3): undefined reference to `install_keyboard’
Pong.c:(.text+0x9e8): undefined reference to `initialise_joystick’
Pong.c:(.text+0x9ed): undefined reference to `install_mouse’
Pong.c:(.text+0x9f9): undefined reference to `load_datafile’
Pong.c:(.text+0xa0c): undefined reference to `allegro_exit’
Pong.c:(.text+0xa14): undefined reference to `allegro_error’
Pong.c:(.text+0xa54): undefined reference to `install_sound’
Pong.c:(.text+0xa5d): undefined reference to `allegro_exit’
Pong.c:(.text+0xa65): undefined reference to `allegro_error’
Pong.c:(.text+0xaa9): undefined reference to `set_gfx_mode’
Pong.c:(.text+0xab2): undefined reference to `allegro_exit’
Pong.c:(.text+0xaba): undefined reference to `allegro_error’
Pong.c:(.text+0xae4): undefined reference to `set_palette’
Pong.c:(.text+0xaf8): undefined reference to `create_bitmap’
Pong.c:(.text+0xb0f): undefined reference to `gfx_driver’
Pong.c:(.text+0xb18): undefined reference to `gfx_driver’
Pong.c:(.text+0xb4c): undefined reference to `allegro_exit’
collect2: ld returned 1 exit status
script@server:~/pong$                                       

gcc Pong.c -lalleg