10:52:17 **** Incremental Build of configuration Nios II for project C4_NIOS_TEST_SOFT **** make all Info: Building ../C4_NIOS_TEST_SOFT_bsp/ C:/intelFPGA_lite/18.1/nios2eds/bin/gnu/H-x86_64-mingw32/bin/make --no-print-directory -C ../C4_NIOS_TEST_SOFT_bsp/ [BSP build complete] Info: Compiling main.c to obj/default/main.o nios2-elf-gcc -xc -MP -MMD -c -I../C4_NIOS_TEST_SOFT_bsp//HAL/inc -I../C4_NIOS_TEST_SOFT_bsp/ -I../C4_NIOS_TEST_SOFT_bsp//drivers/inc -pipe -D__hal__ -DALT_NO_INSTRUCTION_EMULATION -DALT_USE_SMALL_DRIVERS -DSMALL_C_LIB -DALT_SINGLE_THREADED -DALTERA_AVALON_JTAG_UART_SMALL -DALTERA_AVALON_UART_SMALL -O0 -g -Wall -mno-hw-div -mno-hw-mul -mno-hw-mulx -mgpopt=global -o obj/default/main.o main.c main.c: In function 'main': main.c:25:3: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration] printf("Hello from Nios II!\n"); ^ main.c:25:3: warning: incompatible implicit declaration of built-in function 'printf' main.c:25:3: note: include '<stdio.h>' or provide a declaration of 'printf' main.c:28:4: warning: implicit declaration of function 'IOWR_ALTERA_AVALON_PIO_DATA' [-Wimplicit-function-declaration] IOWR_ALTERA_AVALON_PIO_DATA(LED_PIO_BASE, 0xFF); ^ main.c:28:32: error: 'LED_PIO_BASE' undeclared (first use in this function) IOWR_ALTERA_AVALON_PIO_DATA(LED_PIO_BASE, 0xFF); ^ main.c:28:32: note: each undeclared identifier is reported only once for each function it appears in main.c:29:4: warning: implicit declaration of function 'usleep' [-Wimplicit-function-declaration] usleep(500000); ^ make: *** [obj/default/main.o] Error 1