说明：  gpio驱动 leddrv.c为驱动源程序 writeled.c为应用程序 writeled.c 编译方式 arm-elf-gcc -Wall -O2 -Wl,-elf2flt -o writeled writeled.c leddrv.c 编译方式 arm-elf-gcc -D__KERNEL__ -I你的uClinux目录/linux-2.4.x/include-Wall -Wstrict-prototypes -Wno-trigraphs -O2 -fno-strict-aliasing -fno-common -fno-common -pipe -fno-builtin -D__linux__ -DNO_MM -mapcs-32 -march=armv4 -mtune=arm7tdmi -mshort-load-bytes -msoft-float -DMODULE -c -o leddrv.o leddrv.c
(GPIO driver leddrv.c-driven source code for applications writeled.c way writeled.c compiler arm-elf-gcc-Wall-O2-Wl,-elf2flt-o writeled writeled.cleddrv.c way compiler arm-elf-gcc-- you are D__KERNEL__-I of the uClinux directory/linux-2.4.x/include-Wall-Wstrict-prototypes-Wno-trigraphs-O2-fno-strict-aliasing-fno-common-fno-common-pipe-fno-builtin-D__linux__-- DNO_MM-mapcs-32-march = armv4-mtune = arm7tdmi-mshort-load-bytes-msoft-float-DMODULE-c-o leddrv.o leddrv.c)