We Modified share/irep/irep-config.cmake to get exo to export properly. So far we've had to add BUILD_INTERFACE before CMAKE_Fortran_MODULE_DIRECTORY and CMAKE_CURRENT_SOURCE_DIR In target_include_directories.
Pasting the lines into a code block got weird given symbols, so I hope this is clear. Please let me know if you need more details. I can give you a file on LC if that helps.
We're currently using
irep: bda090b