Building via Windows Environment - help

[ldicdican]

Just wanna ask what am I doing wrong when building thru Windows environment, here's the error log:

C:\projects\uv-k5-firmware-custom>win_make
del /Q f4hwn.bin f4hwn.packed.bin f4hwn start.o init.o external\printf\printf.o driver\adc.o driver\aes.o driver\backlight.o driver\bk4819.o driver\crc.o driver\eeprom.o driver\gpio.o driver\i2c.o driver\keyboard.o driver\spi.o driver\st7565.o driver\system.o driver\systick.o driver\uart.o app\action.o app\app.o app\chFrScanner.o app\common.o app\dtmf.o app\flashlight.o app\generic.o app\main.o app\menu.o app\scanner.o app\uart.o am_fix.o audio.o bitmaps.o board.o dcs.o font.o frequencies.o functions.o helper\battery.o helper\boot.o misc.o radio.o scheduler.o settings.o ui\battery.o ui\helper.o ui\inputbox.o ui\main.o ui\menu.o ui\scanner.o ui\status.o ui\ui.o ui\welcome.o version.o main.o start.d init.d external\printf\printf.d driver\adc.d driver\aes.d driver\backlight.d driver\bk4819.d driver\crc.d driver\eeprom.d driver\gpio.d driver\i2c.d driver\keyboard.d driver\spi.d driver\st7565.d driver\system.d driver\systick.d driver\uart.d app\action.d app\app.d app\chFrScanner.d app\common.d app\dtmf.d app\flashlight.d app\generic.d app\main.d app\menu.d app\scanner.d app\uart.d am_fix.d audio.d bitmaps.d board.d dcs.d font.d frequencies.d functions.d helper\battery.d helper\boot.d misc.d radio.d scheduler.d settings.d ui\battery.d ui\helper.d ui\inputbox.d ui\main.d ui\menu.d ui\scanner.d ui\status.d ui\ui.d ui\welcome.d version.d main.d
Could Not Find C:\projects\uv-k5-firmware-custom\am_fix.o
Could Not Find C:\projects\uv-k5-firmware-custom\helper\battery.o
Could Not Find C:\projects\uv-k5-firmware-custom\misc.o
Could Not Find C:\projects\uv-k5-firmware-custom\ui\battery.o
Could Not Find C:\projects\uv-k5-firmware-custom\am_fix.d
Could Not Find C:\projects\uv-k5-firmware-custom\helper\battery.d
Could Not Find C:\projects\uv-k5-firmware-custom\misc.d
Could Not Find C:\projects\uv-k5-firmware-custom\ui\battery.d
Could Not Find C:\projects\uv-k5-firmware-custom\version.d
arm-none-eabi-gcc -c -mcpu=cortex-m0 start.S -o start.o
arm-none-eabi-gcc -Oz -Wall -Werror -mcpu=cortex-m0 -fshort-enums -fno-delete-null-pointer-checks -std=c2x -MMD -flto=auto -Wextra -DPRINTF_INCLUDE_CONFIG_H -DAUTHOR_STRING="EGZUMER+F4HWN" -DVERSION_STRING="v3.8" -DENABLE_UART -DENABLE_BIG_FREQ -DENABLE_SMALL_BOLD -DENABLE_VOX -DENABLE_TX1750 -DENABLE_KEEP_MEM_NAME -DENABLE_WIDE_RX -DENABLE_NO_CODE_SCAN_TIMEOUT -DENABLE_AM_FIX -DENABLE_SQUELCH_MORE_SENSITIVE -DENABLE_FASTER_CHANNEL_SCAN -DENABLE_RSSI_BAR -DENABLE_AUDIO_BAR -DENABLE_COPY_CHAN_TO_VFO -DENABLE_SCAN_RANGES -DENABLE_FLASHLIGHT -DENABLE_CUSTOM_MENU_LAYOUT -DENABLE_FEAT_F4HWN -DALERT_TOT=10 -DSQL_TONE=550 -DAUTHOR_STRING_1="EGZUMER" -DVERSION_STRING_1="v0.22" -DAUTHOR_STRING_2="F4HWN" -DVERSION_STRING_2="v3.8" -DEDITION_STRING="Custom" -DENABLE_FEAT_F4HWN_SPECTRUM -DENABLE_FEAT_F4HWN_RX_TX_TIMER -DENABLE_FEAT_F4HWN_CHARGING_C -DENABLE_FEAT_F4HWN_SLEEP -DENABLE_FEAT_F4HWN_RESTORE_SCAN -DENABLE_FEAT_F4HWN_NARROWER -DENABLE_FEAT_F4HWN_CONTRAST -DENABLE_FEAT_F4HWN_CA -I C:/projects/uv-k5-firmware-custom/ -I C:/projects/uv-k5-firmware-custom//external/CMSIS_5/CMSIS/Core/Include/ -I C:/projects/uv-k5-firmware-custom//external/CMSIS_5/Device/ARM/ARMCM0/Include -c init.c -o init.o
cc1.exe: error: argument to '-O' should be a non-negative integer, 'g', 's' or 'fast'
make: *** [init.o] Error 1
Press any key to continue . . .

I followed all the instructions on "Windows environment build method" option, even read the notes inside win_make.bat but to no avail, please help.