$ make apk
CC apps/action.c
/home/Biont/rockbox/apps/action.c:26:18: error: lang.h: No such file or director
y
In file included from /home/Biont/rockbox/apps/gui/skin_engine/skin_fonts.h:29,
                 from /home/Biont/rockbox/apps/gui/skin_engine/skin_engine.h:28,

                 from /home/Biont/rockbox/apps/gui/statusbar-skinned.h:33,
                 from /home/Biont/rockbox/apps/action.c:42:
/home/Biont/rockbox/firmware/export/font.h:34:21: error: sysfont.h: No such file
 or directory
/home/Biont/rockbox/apps/action.c: In function 'get_action_worker':
/home/Biont/rockbox/apps/action.c:227: warning: implicit declaration of function
 'str'
/home/Biont/rockbox/apps/action.c:227: error: 'LANG_KEYLOCK_OFF' undeclared (fir
st use in this function)
/home/Biont/rockbox/apps/action.c:227: error: (Each undeclared identifier is rep
orted only once
/home/Biont/rockbox/apps/action.c:227: error: for each function it appears in.)
/home/Biont/rockbox/apps/action.c:227: warning: passing argument 2 of 'splash' m
akes pointer from integer without a cast
/home/Biont/rockbox/apps/gui/splash.h:41: note: expected 'const char *' but argu
ment is of type 'int'
/home/Biont/rockbox/apps/action.c:236: error: 'LANG_KEYLOCK_ON' undeclared (firs
t use in this function)
/home/Biont/rockbox/apps/action.c:236: warning: passing argument 2 of 'splash' m
akes pointer from integer without a cast
/home/Biont/rockbox/apps/gui/splash.h:41: note: expected 'const char *' but argu
ment is of type 'int'
/home/Biont/rockbox/apps/action.c:305: warning: passing argument 2 of 'splash' m
akes pointer from integer without a cast
/home/Biont/rockbox/apps/gui/splash.h:41: note: expected 'const char *' but argu
ment is of type 'int'
make: *** [/home/Biont/rockbox/build/apps/action.o] Error 1