Hi Paul / Hi All, Thank you very much. I appreciate your very quick answer. All your recommendations proved to be very useful. As you suggested, I redirected the output of both the build and stderr to an external file, and let the build process run in serial mode instead of the parallel one that I had done before. The serial build took much more time (about 2 hours) but this is normal behavior. I presume. In fact, I had to let it run twice as after the first run. The same error message about 'sanitizer_platform_limits_posix.cc' occured as explained in the second link of my original post. This one was straightforward to fix based on that information. Then after the second run, which was successful, I have investigated again the log file. No error message appeared only a few warning messages. I think they are acceptable. So after all these, I went further as described at the very first link of my OP. which is for easier reference here again: https://linuxhostsupport.com/blog/how-to-install-gcc-on-ubuntu-18-04/ These are the specific steps that I closely followed: " Once the build is finished, we can continue to actually installing GCC with the following command: sudo make install With adding the following lines at the end of the .bashrc file, we will permanently add the compilers to the system’s path. nano /root/.bashrc Add this to the end of that file: export export PATH=/usr/local/gcc-8.2/bin:$PATH export LD_LIBRARY_PATH=/usr/local/gcc-8.2/lib64:$LD_LIBRARY_PATH With this command, we will reload .bashrc without restarting the machine: . .bashrc " No error messages or anything similar, therefore my opinion is that everything was successful. The GCC 6.3.0 was installed in the below directory of my computer: /usr/local/gcc-6.3 However, my Ubuntu (terminal) cannot find the path to the recently installed GCC 6.3.0, which I find very interesting why. Could you please help me what I still miss to properly configure GCC 6.3.0? In my opinion, there must be only a very minor command that needs to be run for the entirely correct configuration. Thank you very much for your help in advance again. /rawpointer ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Tuesday, January 26, 2021 10:23 PM, Paul Smith <psmith@xxxxxxx> wrote: > On Tue, 2021-01-26 at 14:04 -0700, lordmund--- via Gcc-help wrote: > > > Unfortunately, the above error message is quite informative. (maybe > > just for me) > > I don't see any actual error messages here (other than the last line > which is just make telling you that something earlier failed). > > I suspect that the actual error is much earlier in your build process > than what you quote here, and since you're using parallel builds the > build continues on with other things even after the error. > > You should be sure you redirect the output of the build (and stderr!) > to a file, then search the file for the FIRST instance of a make error > message (has the "***" in the message) and look at what errors happened > just before that. Maybe that will help you understand the problem. If > not reply to the list with those error messages.