Critical Issue
No, the Nios® II SBT for Eclipse is not included starting from Intel® Quartus® Prime Pro and Standard Edition Software version 19.1 onwards.
To install the Nios® II SBT for Eclipse, follow the steps below:
1. Download CDT 8.8.1 which is Eclipse C/C IDE for Mars.2
Note: Try the mirror links if the main source link doesn't work.
2. Extract the downloaded file into <Intel Quartus installation directory>/nios2eds/bin. You should see the <Intel Quartus installation directory>/nios2eds/bin/eclipse folder after extraction is done.
3. Rename the <Intel Quartus installation directory>/nios2eds/bin/eclipse folder to <Intel Quartus installation directory>/nios2eds/bin/eclipse_nios2
4. Extract the <Intel Quartus installation directory>/nios2eds/bin/eclipse_nios2_plugins.zip (or tar.gz for Linux) to <Intel Quartus installation directory>/nios2eds/bin. The extraction will override files in <Intel Quartus installation directory>/nios2eds/bin/eclipse_nios2.
5. Verify the extraction is done correctly by making sure you see the <Intel Quartus installation directory>/nios2eds/bin/eclipse_nios2/plugin_customization.ini file
6. You can now launch Nios II SBT for Eclipse via eclipse-nios2.exe
The instructions are included in the <Intel Quartus installation directory>/nios2eds/bin/README.
This information will be included in the future release version of Intel® FPGA Software Installation and Licensing User Guide.