# AcoSail V2 ARM64 CROSS build Dockerfile  

Useing AcoSail V2 minibase rootfs with Debian-slim docker-base.  
This Docker can be use for crossbuild AcoSail V2 C/C++ cli programs;  
And testing the program inside the Docker without a real ARM64 hardware.   

# How to build Docker  
~~~bash  
sudo docker build -t acosail_v2_cross:1.0 .   
~~~    

# How to RUN this docker for crossbuild  
Of cause you need have some crossbuild experience before you using this tool.  
You can learn crossbuild on google/github and maybe CSDN.  
~~~bash  
export PROJECT_DIR  
sudo docker run -it --rm -v ${PROJECT_DIR}:/app  acosail_v2_cross:1.0   
# Do what ever you want to build an arm64 C/C++ cli program;  
# Don't forget to make sure your have set FLAGS -isysroot=/rootfs;  
~~~  

## FAQ for crossbuild  
You may find some projects complain about lacking packages ,like libzma-dev;  
To fix it, you can do like following:  
~~~bash  
chroot /rootfs bash  
apt update  
#apt install lacking packages;  
~~~  

# How to RUN this docker for QEMU arm64 native & VERY SLOW build 
~~~bash  
export PROJECT_DIR  
sudo docker run -it --rm -v ${PROJECT_DIR}:/rootfs/app  acosail_v2_cross:1.0  
#Inside docker  
chroot /rootfs/app  
# Do what you want to build a native arm64 program;  
# It can & should be very slow;  
~~~  

# How to test builded app  
We suppose you have build your progarms already.  
~~~bash  
export PROJECT_DIR  
sudo docker run -it --rm -v ${PROJECT_DIR}:/rootfs/app  acosail_v2_cross:1.0  
#Insdile docker  
chroot /rootfs/app  
# Do anything you like to run a native program  
~~~  

## FAQ for run app  
Your app is run as root user；  
You do not have any hardware, so you can't test kernel moudles；  
And it can be very slow.