make的时候出现错误：
gcc -DALLEGRO_SRC -Wall -Wno-unused -mcpu=pentium -O2 -funroll-loops -ffast-math -fomit-frame-pointer -I. -I./include -o obj/djgpp/alleg/fli.o -c src/fli.c
`-mcpu=' is deprecated. Use `-mtune=' or '-march=' instead.
src/fli.c: In function 'do_fli_256_color':
src/fli.c:319: error: invalid lvalue in increment
src/fli.c:333: error: invalid lvalue in assignment
src/fli.c: In function 'do_fli_delta':
src/fli.c:364: error: invalid lvalue in increment
src/fli.c:369: error: invalid lvalue in increment
src/fli.c:379: error: invalid lvalue in increment
src/fli.c:393: error: invalid lvalue in increment
src/fli.c:399: error: invalid lvalue in assignment
src/fli.c:409: error: invalid lvalue in assignment
src/fli.c:411: error: invalid lvalue in increment
src/fli.c: In function 'do_fli_color':
src/fli.c:435: error: invalid lvalue in increment
src/fli.c:449: error: invalid lvalue in assignment
src/fli.c: In function 'do_fli_lc':
src/fli.c:479: error: invalid lvalue in increment
src/fli.c:480: error: invalid lvalue in increment
src/fli.c:500: error: invalid lvalue in increment
src/fli.c:506: error: invalid lvalue in assignment
src/fli.c:516: error: invalid lvalue in assignment
src/fli.c: In function 'do_fli_brun':
src/fli.c:568: error: invalid lvalue in increment
src/fli.c:575: error: invalid lvalue in assignment
src/fli.c:584: error: invalid lvalue in assignment
src/fli.c:596: error: invalid lvalue in increment
src/fli.c:603: error: invalid lvalue in assignment
src/fli.c:612: error: invalid lvalue in assignment
src/fli.c: In function '_fli_read_header':
src/fli.c:653: error: invalid lvalue in increment
src/fli.c:654: error: invalid lvalue in increment
src/fli.c:655: error: invalid lvalue in increment
src/fli.c:656: error: invalid lvalue in increment
src/fli.c:657: error: invalid lvalue in increment
src/fli.c:658: error: invalid lvalue in increment
src/fli.c:659: error: invalid lvalue in increment
src/fli.c:660: error: invalid lvalue in increment
src/fli.c:661: error: invalid lvalue in increment
src/fli.c:662: error: invalid lvalue in increment
src/fli.c: In function '_fli_read_frame':
src/fli.c:679: error: invalid lvalue in increment
src/fli.c:680: error: invalid lvalue in increment
src/fli.c:681: error: invalid lvalue in increment
src/fli.c: In function '_fli_parse_chunk':
src/fli.c:696: error: invalid lvalue in increment
src/fli.c:697: error: invalid lvalue in increment
make.exe: *** [obj/djgpp/alleg/fli.o] Error 1