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# Installation j1939 for AGL
#### Minimum kernel version : 4.19
## Compilation of kernel j1939
##### Clone linux-can-next repository on kernel.org
```bash
git clone https://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next.git/
```
##### Checkout on j1939 branch
```bash
git checkout j1939
```
##### Add the compilation of the j1939
```bash
make menuconfig
- Networking Support
- Can bus subsystem support
- <M> SAE J1939
- [*] debug SAE J1939
```
##### Compile
```bash
make
```
##### Install
```bash
make modules_install
make install
```
##### Update grub
###### CentOS/RHEL/Oracle/Scientific and Fedora Linux
```bash
grub2-mkconfig -o /boot/grub2/grub.cfg
grubby --set-default /boot/vmlinuz-...
reboot
```
###### Debian/Ubuntu Linux
```bash
update-grub
reboot
```
##### Check if the installation is correct
```bash
modprobe can-j1939
```
If no errors are generated you have successfully install a kernel with j1939 module.
You can have a problem with header file, to check that go in the file /usr/include/linux/can.h
```bash
vi /usr/include/linux/can.h
```
If in the struct sockaddr_can you don't see j1939, the header are not upgrade.
So you need to do this manually, go to you're linux-can-next repository and do the following command:
```bash
cp include/uapi/linux/can.h /usr/include/linux/can.h
cp include/uapi/linux/can/j1939.h /usr/include/linux/can/
```
### Activate J1939 CMAKE
To activate J1939 at the compilation.
Edit the file conf.d/cmake/cmake/config.cmake
And change the line :
```cmake
option(WITH_FEATURE_J1939 "Activate J1939" OFF)
```
With :
```cmake
option(WITH_FEATURE_J1939 "Activate J1939" ON)
```
|
