I have 10GB free space in /tmp. But it isn't enough to run "make check" because LTO tests don't cleanup after run. It leads to many false alarms and make my machine unusable.
Do you know what temporary files are being used here? Is it an issue with the driver or with the reader?
LTO creates huge temporary assembly files, some of which > 2GB.
This is fixed in lto revision 149354. I ran make check-gcc and watched /tmp. Temporary files were removed as the testsuite ran.