https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82348
--- Comment #3 from martin <mfe at live dot de> --- As suggested (in another bugreport) I built gcc from the gcc-trunk source without any local modification. I compiled gcc from the following revision: >gcc-trunk# svn info >Path: . >URL: svn://gcc.gnu.org/svn/gcc/trunk >Repository Root: svn://gcc.gnu.org/svn/gcc >Repository UUID: 138bc75d-0d04-0410-961f-82ee72b054a4 >Revision: 253004 >Node Kind: directory >Schedule: normal >Last Changed Author: jakub >Last Changed Rev: 253004 >Last Changed Date: 2017-09-20 11:04:22 +0200 (Wed, 20 Sep 2017) I also can ensure that I did not modify any local files of the gcc source files, which I checked with `svn status`, or any other generated gcc build files. Anyway, I understand your concerns, and I will proceed as you described.