preloader can not be generated

https://rocketboards.org/foswiki/documentation/gsrd140preloader

when i Run makecommand to build the preloader image

Generating include/generated/asm-offsets.h

tools/scripts/make-asm-offsets arch/arm/cpu/armv7/socfpga/asm-offsets.s include/generated/asm-offsets.h

for dir in tools examples/standalone examples/api arch/arm/cpu/armv7 ; do

/bin/make -C $dir _depend ; done

make[2]: Entering directory '/cygdrive/d/intelFPGA_lite/FPGA2/software/spl_bsp/uboot-socfpga/tools'

make[2]: Nothing to be done for '_depend'.

make[2]: Leaving directory '/cygdrive/d/intelFPGA_lite/FPGA2/software/spl_bsp/uboot-socfpga/tools'

make[2]: Entering directory '/cygdrive/d/intelFPGA_lite/FPGA2/software/spl_bsp/uboot-socfpga/examples/standalone'

make[2]: Nothing to be done for '_depend'.

make[2]: Leaving directory '/cygdrive/d/intelFPGA_lite/FPGA2/software/spl_bsp/uboot-socfpga/examples/standalone'

make[2]: Entering directory '/cygdrive/d/intelFPGA_lite/FPGA2/software/spl_bsp/uboot-socfpga/examples/api'

make[2]: Nothing to be done for '_depend'.

make[2]: Leaving directory '/cygdrive/d/intelFPGA_lite/FPGA2/software/spl_bsp/uboot-socfpga/examples/api'

make[2]: Entering directory '/cygdrive/d/intelFPGA_lite/FPGA2/software/spl_bsp/uboot-socfpga/arch/arm/cpu/armv7'

make[2]: Nothing to be done for '_depend'.

make[2]: Leaving directory '/cygdrive/d/intelFPGA_lite/FPGA2/software/spl_bsp/uboot-socfpga/arch/arm/cpu/armv7'

/bin/make -C tools all

make[2]: Entering directory '/cygdrive/d/intelFPGA_lite/FPGA2/software/spl_bsp/uboot-socfpga/tools'

x86_64-w64-mingw32-gcc -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -idirafter /cygdrive/d/intelFPGA_lite/FPGA2/software/spl_bsp/uboot-socfpga/include -idirafter /cygdrive/d/intelFPGA_lite/FPGA2/software/spl_bsp/uboot-socfpga/include2 -idirafter /cygdrive/d/intelFPGA_lite/FPGA2/software/spl_bsp/uboot-socfpga/include -I /cygdrive/d/intelFPGA_lite/FPGA2/software/spl_bsp/uboot-socfpga/lib/libfdt -I /cygdrive/d/intelFPGA_lite/FPGA2/software/spl_bsp/uboot-socfpga/tools -DCONFIG_SYS_TEXT_BASE=0x01000040 -DUSE_HOSTCC -D__KERNEL_STRICT_NAMES -ansi -o mkenvimage.o mkenvimage.c -c

mkenvimage.c:41:22: fatal error：sys/mman.h：No such file or directory

# include <sys/mman.h>

^

Compile interrupt

/cygdrive/d/intelFPGA_lite/FPGA2/software/spl_bsp/uboot-socfpga/rules.mk:66: recipe for target 'mkenvimage.o' failed

make[2]: *** [mkenvimage.o] Error 1

make[2]: Leaving directory '/cygdrive/d/intelFPGA_lite/FPGA2/software/spl_bsp/uboot-socfpga/tools'

Makefile:590: recipe for target 'tools' failed

make[1]: *** [tools] Error 2

make[1]: Leaving directory '/cygdrive/d/intelFPGA_lite/FPGA2/software/spl_bsp/uboot-socfpga'

make: *** [uboot-socfpga/spl/u-boot-spl.bin] Error 2

win10 64 1803

how to fix it?