Software development kits (SDKs)
Overview⚓︎
Reference SDKs are to be made available at hostmobility.org/sdk.
Building⚓︎
SDKs are built for a specific system image using bitbake -c populate_sdk <image-name>.
example with MACHINE set to imx8mp-var-dart-hmx1
The installer has now been built. Its name is based on the architechture, image name and poky
version. In this case, the name is
poky-glibc-x86_64-console-hostmobility-image-cortexa53-crypto-imx8mp-var-dart-hmx1-toolchain-4.0.13.sh
Note: the console-hostmobility-image should include more packages for more debugging purpose: - IMAGE_INSTALL - gdb, for debug on target machine - gdbserver, for debug on target machine - glibc-dbg, for debug on target machine - packagegroup-sdk-target
Installation⚓︎
The SDK is installed by running the installer from the build step above.
Set the file as executable
chmod +x poky-glibc-x86_64-console-hostmobility-image-cortexa53-crypto-imx8mp-var-dart-hmx1-toolchain-4.0.13.sh
Run the installer
./poky-glibc-x86_64-console-hostmobility-image-cortexa53-crypto-imx8mp-var-dart-hmx1-toolchain-4.0.13.sh
Select directory where to install the SDK
Poky (Yocto Project Reference Distro) SDK installer version 4.0.13
==================================================================
Enter target directory for SDK (default: /opt/poky/4.0.13): ~/sdk/
You are about to install the SDK to "/home/mattias/sdk". Proceed [Y/n]? Y
Extracting SDK.................................................................^Bn................................................................................................................................................................done
Setting it up...done
SDK has been successfully set up and is ready to be used.
Each time you wish to use the SDK in a new shell session, you need to source the environment setup script e.g.
$ . /home/mattias/sdk/environment-setup-cortexa53-crypto-poky-linux
Usage and test⚓︎
To get generate source code for a sample application, save the following in a file named program.c.
#include <stdio.h>
int main(int argc, char *argv[])
{
for (int i = 0; i < argc; i++) {
printf("%d: %s\n", argc, argv[i]);
}
}
Source the enviroment-setup directory where you installed the SDK.
run make
Make is now aware of the cross-compiler through the environment.aarch64-poky-linux-gcc -mcpu=cortex-a53 -march=armv8-a+crc+crypto -mbranch-protection=standard -fstack-protector-strong -O2 -D_FORTIFY_SOURCE=2 -Wformat -Wformat-security -Werror=format-security --sysroot=/home/mattias/sdk/sysroots/cortexa53-crypto-poky-linux -O2 -pipe -g -feliminate-unused-debug-types -Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed -Wl,-z,relro,-z,now program.c -o program
Example: access kernel headers e.g. when compiling external modules