Hello, With link time optimization the stack usage information is determined during local transformation and written to program.ltrans0.ltrans.su. There will be one .su file for each partition.
All ltrans files, including the .su, are removed unless –save-temps is indicated. Although not obvious/not documented, but I am assuming this is working as designed. Developers should include –save-temps along with -fstack-suage and -flto. Or is this a bug? That is exception should be made for the ltrans.su files and they should be kept around regardless. Thanks, Visda