How to fix build/../smbusb_firmware.c:843: syntax error: token -> 'TF0_ISR' ; column 37 thx

[kocoman2]

make
Making all in firmware
make[1]: Entering directory '/home/Downloads/smbusb/firmware'
Makefile:17: warning: overriding recipe for target 'clean'
../fx2lib/lib/fx2.mk:98: warning: ignoring old recipe for target 'clean'
mkdir -p build
sdcc -mmcs51 -c -o build/smbusb_firmware.rel -I ../fx2lib/include -I "" build/../smbusb_firmware.c
build/../smbusb_firmware.c:99: warning 283: function declarator with no prototype
build/../smbusb_firmware.c:139: warning 283: function declarator with no prototype
build/../smbusb_firmware.c:144: warning 283: function declarator with no prototype
build/../smbusb_firmware.c:159: warning 283: function declarator with no prototype
build/../smbusb_firmware.c:163: warning 283: function declarator with no prototype
build/../smbusb_firmware.c:843: warning 283: function declarator with no prototype
build/../smbusb_firmware.c:843: syntax error: token -> 'TF0_ISR' ; column 37
make[1]: *** [../fx2lib/lib/fx2.mk:83: build/smbusb_firmware.rel] Error 1
make[1]: Leaving directory '/home/Downloads/smbusb/firmware'
make: *** [Makefile:394: all-recursive] Error 1