I sent this note after reading "Final install" and seeing the buildstat.html hasn't had 14.x yet, indicating my success in building and installing GCC.
config.guess output: x86_64-pc-linux-gnu gcc -v output: Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-pc-linux-gnu/14.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: ../gcc-13-src/configure Thread model: posix Supported LTO compression algorithms: zlib gcc version 14.0.0 20230730 (experimental) (GCC) Distribution and version: Ubuntu 20.04.6 LTS uname -v output: #66~20.04.1-Ubuntu SMP Wed Jan 25 09:41:30 UTC 2023 Manually filtered output of 'dpkg -l libc6': Name Version Architecture Description ==============-===============-============-=============================== libc6:amd64 2.31-0ubuntu9.9 amd64 GNU C Library: Shared libraries libc6:i386 2.31-0ubuntu9.9 i386 GNU C Library: Shared libraries Other feedback regarding personal struggles in 'Prerequisites for GCC': Note: I'm using Ubuntu 20.04.6 LTS, and I tried apt search on all packages below at least 3 times with different wording. Even now I'm still not sure about if "TeX (any working version)" that is necessary for running texi2dvi and texi2pdf was supposed to be a seperate package, it's just below "Texinfo version 4.7 (or later)". Regarding "Sphinx version 1.0 (or later)" just beneath "TeX (any working version)", I think I finally got it right as it being related to python3 instead of as a search engine, after some digging on the Internet. It may be good to mention its relationship with python3 so others have more clue (unless I've been wrong about everything despite the ultimate success).