AcoSailV2CrossArm64 inited and tested on localobs

Dockerfile

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+FROM debian:bullseye-slim
+
+# Update apt and get crossbuild ENV for arm64;
+RUN apt-get update && \
+    apt-get install -y crossbuild-essential-arm64 vim 
+
+# Set ENV for crossbuild arm64 app;
+ENV CC=aarch64-linux-gnu-gcc
+ENV CXX=aarch64-linux-gnu-g++
+
+# Make dir for sources' dir in host machine;
+RUN mkdir /app
+WORKDIR /app
+
+# Add ARM64 base rootfs into Docker;
+ADD ./rootfs_minbase.tar.xz /rootfs
+
+# Make sure we can qemu arm64 inside Docker;
+COPY ./qemu-aarch64-static /usr/bin/qemu-aarch64-static 
+COPY ./qemu-aarch64-static /rootfs/bin/qemu-aarch64-static
+
+# Add some tools to make rootfs useble;
+RUN chroot /rootfs bash -c "apt update && \
+    apt install -y build-essential libncurses5-dev llvm-dev clang cmake "
+
+# Now we are in AcoSail V2 cross build ENV for arm64.
+CMD ["/bin/bash"]
+

README.md

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+# 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.  
+

app/test.c

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+#include <stdio.h>
+
+int main() {
+	printf("corss_build acosail V2 app\n");
+	return 0;
+}