https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91163
--- Comment #5 from jdobry at centrum dot cz --- I found one new dependency of this bug: GCC 9.1.0 + binutils 2.30 is OK GCC 9.1.0 + binutils 2.32 failing with " error: could not unlink output file" Everything except binutils version was same. I will try binutils 2.31 to reduce universe of possible reasons.
