https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91902
--- Comment #3 from Georgy <akulishe95 at mail dot ru> --- No, I have to directories which have name "gcc-9.2.0" and "gcc9.2.0". The source code is inside "gcc-9.2.0", (In reply to kargl from comment #1) > (In reply to Georgy from comment #0) > > After configuring gcc (version 9.2.0) with the following options: > > ./configure > > The above "./configure" suggests that you are trying to build gcc > within the directory that contains the source code. That isn't > supported. > > > What is the nature of the problem and is there a solution to tackle it? > > See the instruction for installing gcc at https://gcc.gnu.org/install/ No, I have two directories. One has name "gcc-4.9.2" and the other has name "gcc4.9.2". The source code is inside "gcc-4.9.2". The folder "gcc4.9.2" is empty and was made specially to use it as "prefix".