Step 4 : Compile Free-RTOS
In this program, you are going to learn
How to ?
Topics in this section,
Download the following patch and place it in the parent directory of FreeRTOS-raspi3:
Apply the changes using the above patch to the FreeRTOS-raspi3 directory using below command:
$ patch --directory=FreeRTOS-raspi3/ --strip=1 < add_patch_to_FreeRTOS-raspi3.patch
The output of above command should look something like this:
patching file Demo/FreeRTOSConfig.h
patching file Demo/main.c
patching file Demo/uart.c
patching file Drivers/serial/serial.c
patching file Drivers/serial/serial.h
patching file Drivers/serial/uart.c
patching file Drivers/serial/UARTCommandConsole.c
patching file Drivers/serial/uart_string.c
patching file Drivers/serial/uart_string.h
patching file FreeRTOS/Source/tasks.c
patching file FreeRTOS_Plus_Cli/FreeRTOS_CLI.c
patching file FreeRTOS_Plus_Cli/FreeRTOS_CLI.h
patching file FreeRTOS_Plus_Cli/Sample-CLI-commands.c
patching file .git/config
patching file .git/description
patching file .git/HEAD
patching file .git/hooks/applypatch-msg.sample
patching file .git/hooks/commit-msg.sample
patching file .git/hooks/fsmonitor-watchman.sample
patching file .git/hooks/post-update.sample
patching file .git/hooks/pre-applypatch.sample
patching file .git/hooks/pre-commit.sample
patching file .git/hooks/pre-merge-commit.sample
patching file .git/hooks/prepare-commit-msg.sample
patching file .git/hooks/pre-push.sample
patching file .git/hooks/pre-rebase.sample
patching file .git/hooks/pre-receive.sample
patching file .git/hooks/push-to-checkout.sample
patching file .git/hooks/update.sample
patching file .git/info/exclude
patching file .git/logs/HEAD
patching file .git/logs/refs/heads/master
patching file .git/logs/refs/remotes/origin/HEAD
patching file .git/packed-refs
patching file .git/refs/heads/master
patching file .git/refs/remotes/origin/HEAD
patching file Makefile
Once the patching is done, move to the FreeRTOS-raspi3 directory
$ cd FreeRTOS-raspi3
Run make command to compile the FreeRTOS source code.
FreeRTOS-raspi3$ make
mkdir build
aarch64-none-elf-as -mcpu=cortex-a53 -c -o build/startup.o Demo/startup.S
aarch64-none-elf-as -mcpu=cortex-a53 -c -o build/FreeRTOS_asm_vector.o Demo/FreeRTOS_asm_vector.S
aarch64-none-elf-gcc -mcpu=cortex-a53 -fpic -ffreestanding -std=gnu99 -O2 -Wall -Wextra -IFreeRTOS/Source/include -IFreeRTOS/Source/portable/GCC/ARM_CA53_64_RaspberryPi3 -IDemo -IFreeRTOS_Plus_Cli -IDrivers/serial -c -o build/FreeRTOS_tick_config.o Demo/FreeRTOS_tick_config.c
aarch64-none-elf-gcc -mcpu=cortex-a53 -fpic -ffreestanding -std=gnu99 -O2 -Wall -Wextra -IFreeRTOS/Source/include -IFreeRTOS/Source/portable/GCC/ARM_CA53_64_RaspberryPi3 -IDemo -IFreeRTOS_Plus_Cli -IDrivers/serial -c -o build/uart_string.o Drivers/serial/uart_string.c
aarch64-none-elf-gcc -mcpu=cortex-a53 -fpic -ffreestanding -std=gnu99 -O2 -Wall -Wextra -IFreeRTOS/Source/include -IFreeRTOS/Source/portable/GCC/ARM_CA53_64_RaspberryPi3 -IDemo -IFreeRTOS_Plus_Cli -IDrivers/serial -c -o build/uart.o Drivers/serial/uart.c
aarch64-none-elf-gcc -mcpu=cortex-a53 -fpic -ffreestanding -std=gnu99 -O2 -Wall -Wextra -IFreeRTOS/Source/include -IFreeRTOS/Source/portable/GCC/ARM_CA53_64_RaspberryPi3 -IDemo -IFreeRTOS_Plus_Cli -IDrivers/serial -c -o build/Sample-CLI-commands.o FreeRTOS_Plus_Cli/Sample-CLI-commands.c
aarch64-none-elf-gcc -mcpu=cortex-a53 -fpic -ffreestanding -std=gnu99 -O2 -Wall -Wextra -IFreeRTOS/Source/include -IFreeRTOS/Source/portable/GCC/ARM_CA53_64_RaspberryPi3 -IDemo -IFreeRTOS_Plus_Cli -IDrivers/serial -c -o build/UARTCommandConsole.o Drivers/serial/UARTCommandConsole.c
aarch64-none-elf-gcc -mcpu=cortex-a53 -fpic -ffreestanding -std=gnu99 -O2 -Wall -Wextra -IFreeRTOS/Source/include -IFreeRTOS/Source/portable/GCC/ARM_CA53_64_RaspberryPi3 -IDemo -IFreeRTOS_Plus_Cli -IDrivers/serial -c -o build/FreeRTOS_CLI.o FreeRTOS_Plus_Cli/FreeRTOS_CLI.c
aarch64-none-elf-gcc -mcpu=cortex-a53 -fpic -ffreestanding -std=gnu99 -O2 -Wall -Wextra -IFreeRTOS/Source/include -IFreeRTOS/Source/portable/GCC/ARM_CA53_64_RaspberryPi3 -IDemo -IFreeRTOS_Plus_Cli -IDrivers/serial -c -o build/serial.o Drivers/serial/serial.c
aarch64-none-elf-gcc -mcpu=cortex-a53 -fpic -ffreestanding -std=gnu99 -O2 -Wall -Wextra -IFreeRTOS/Source/include -IFreeRTOS/Source/portable/GCC/ARM_CA53_64_RaspberryPi3 -IDemo -IFreeRTOS_Plus_Cli -IDrivers/serial -c -o build/main.o Demo/main.c
aarch64-none-elf-gcc -mcpu=cortex-a53 -fpic -ffreestanding -std=gnu99 -O2 -Wall -Wextra -IFreeRTOS/Source/include -IFreeRTOS/Source/portable/GCC/ARM_CA53_64_RaspberryPi3 -IDemo -IFreeRTOS_Plus_Cli -IDrivers/serial -c -o build/port.o FreeRTOS/Source/portable/GCC/ARM_CA53_64_RaspberryPi3/port.c
aarch64-none-elf-as -mcpu=cortex-a53 -c -o build/portASM.o FreeRTOS/Source/portable/GCC/ARM_CA53_64_RaspberryPi3/portASM.S
aarch64-none-elf-gcc -mcpu=cortex-a53 -fpic -ffreestanding -std=gnu99 -O2 -Wall -Wextra -IFreeRTOS/Source/include -IFreeRTOS/Source/portable/GCC/ARM_CA53_64_RaspberryPi3 -IDemo -IFreeRTOS_Plus_Cli -IDrivers/serial -c -o build/list.o FreeRTOS/Source/list.c
aarch64-none-elf-gcc -mcpu=cortex-a53 -fpic -ffreestanding -std=gnu99 -O2 -Wall -Wextra -IFreeRTOS/Source/include -IFreeRTOS/Source/portable/GCC/ARM_CA53_64_RaspberryPi3 -IDemo -IFreeRTOS_Plus_Cli -IDrivers/serial -c -o build/tasks.o FreeRTOS/Source/tasks.c
aarch64-none-elf-gcc -mcpu=cortex-a53 -fpic -ffreestanding -std=gnu99 -O2 -Wall -Wextra -IFreeRTOS/Source/include -IFreeRTOS/Source/portable/GCC/ARM_CA53_64_RaspberryPi3 -IDemo -IFreeRTOS_Plus_Cli -IDrivers/serial -c -o build/queue.o FreeRTOS/Source/queue.c
aarch64-none-elf-gcc -mcpu=cortex-a53 -fpic -ffreestanding -std=gnu99 -O2 -Wall -Wextra -IFreeRTOS/Source/include -IFreeRTOS/Source/portable/GCC/ARM_CA53_64_RaspberryPi3 -IDemo -IFreeRTOS_Plus_Cli -IDrivers/serial -c -o build/timers.o FreeRTOS/Source/timers.c
aarch64-none-elf-gcc -mcpu=cortex-a53 -fpic -ffreestanding -std=gnu99 -O2 -Wall -Wextra -IFreeRTOS/Source/include -IFreeRTOS/Source/portable/GCC/ARM_CA53_64_RaspberryPi3 -IDemo -IFreeRTOS_Plus_Cli -IDrivers/serial -c -o build/heap_1.o FreeRTOS/Source/portable/MemMang/heap_1.c
aarch64-none-elf-gcc -Wl,--build-id=none -std=gnu11 -T raspberrypi3.ld -o kernel8.elf -ffreestanding -O2 -nostdlib build/startup.o build/FreeRTOS_asm_vector.o build/FreeRTOS_tick_config.o build/uart_string.o build/uart.o build/Sample-CLI-commands.o build/UARTCommandConsole.o build/FreeRTOS_CLI.o build/serial.o build/main.o build/port.o build/portASM.o build/list.o build/tasks.o build/queue.o build/timers.o build/heap_1.o
aarch64-none-elf-objdump -D kernel8.elf > kernel8.list
Once the build is done the kernel8.elf file will be generated. Verify it by running below command:
FreeRTOS-raspi3$ ls -l
total 316
drwxrwxr-x 2 test test 4096 May 20 17:33 build
drwxrwxr-x 2 test test 4096 May 20 17:33 Demo
drwxrwxr-x 3 test test 4096 May 20 17:33 Drivers
drwxrwxr-x 3 test test 4096 May 20 16:30 FreeRTOS
drwxrwxr-x 2 test test 4096 May 20 17:33 FreeRTOS_Plus_Cli
-rwxrwxr-x 1 test test 107464 May 20 17:33 kernel8.elf
-rw-rw-r-- 1 test test 235605 May 20 17:33 kernel8.list
drwxrwxr-x 2 test test 4096 May 20 16:30 License
-rw-rw-r-- 1 test test 2228 May 20 17:33 Makefile
-rw-rw-r-- 1 test test 611 May 20 16:30 raspberrypi3.ld
-rw-rw-r-- 1 test test 409 May 20 16:30 README.md