Common Problems and Solutions

Making changes to cores in a library

A common situation is that a user wants to use their own copy of a core, instead of the one provided by a library, for example to fix a bug or add new functionality. The following steps can be used to achieve this:

Example. Replace a core in a library with a user-specified version

1. Create a new directory to keep the user-copies of the cores (this directory will be referred to as $corelib from now on)

2. Download the core source (the repository or URL can be found in the [provider] section of the original core)

3. If the downloaded core already contains a .core file, this step is ignored Copy the original .core file to the root of the downloaded core. Edit the file and remove the [provider] section. (This will stop FuseSoC from downloading the core and use files from the directory containing the .core file instead)

4. Add $corelib to the end of your library search path, either by editing fusesoc.conf or by adding --cores-root=$corelib to the command-line arguments

5. Verify that the new core is found by running fusesoc core-info $core. Check the output to see that “Core root:” is set to the directory where the core was downloaded