I also need to know how to link to a relative platform. I created a custom platform on one PC on its D: drive and was able to build, but when I copy the directories to another PC's D: drive, I get the error below
'Building file: ../message_multicore.cfg'
'Invoking: XDCtools'
"C:/ti/xdctools_3_25_00_48/xs" --xdcpath="C:/ti/ipc_1_24_03_32/packages;C:/ti/bios_6_35_01_29/packages;C:/ti/ccsv5/ccs_base;C:/Work/M2-HF/Eddie/GitClones/M2HfDsp;" xdc.tools.configuro -o configPkg -t ti.targets.elf.C66 -p M2HF_platform_C6678 -r debug -c "C:/ti/ccsv5/tools/compiler/c6000_7.4.2" --compileOptions "-g --optimize_with_debug" "../message_multicore.cfg"
js: "C:/ti/xdctools_3_25_00_48/packages/xdc/tools/Cmdr.xs", line 51: Error: xdc.tools.configuro: Error: Can't find platform package M2HF_platform_C6678