Ok, I'd like to report that with the patch you sent me privately, I was able to compile https://github.com/hebisch/gpc=20 combined with ftp://ftp.gnu.org/gnu/gcc/gcc-3.4.6/gcc-core-3.4.6.tar.bz2 using Ubuntu 20.10 compiler: was to say default but: gcc (GCC) 9.3.1 20200430 (for GNAT Community 2020 20200818) paul@jacko:~/gpc$ gpc --version gpc 20070904, based on gcc-3.4.6 paul@jacko:~/gpc$ /usr/local/bin/gcc --version gcc (GCC) 3.4.6 I did had to edit p/doc/hr/gpc.texi to begins: -------------------------------------------------- \input texinfo @setfilename gpc-hr.info @documentencoding iso-8859-2 @settitle GNU Pascal priru<E8>nik. @c We use Latin 2 charset for hr_HR language. @set charset iso-8859-2 ----------------- and p/doc/es/gpcs.texi to begins: ----------------------- \input texinfo @setfilename gpcs.info @documentencoding iso-8859-1 @settitle Est<E1>ndar de Codificaci<F3>n GNU Pascal @c Copyright (C) 2001-2006 Free Software Foundation, Inc. @c @c Authors: Frank Heckenbach <mailto:frank@pascal.gnu.de> @c          Peter Gerwinski <mailto:peter@gerwinski.de> @c          Nicola Girardi <mailto:nicola@g-n-u.de> @c @c Remember to update this when you save @set lastupdate 2006-02-02 @direntry * Est<E1>ndares de Codificaci<F3>n Pascal: (gpcs).   Est<E1>ndares de codificaci<F3>n GNU Pascal. @end direntry ----------------------------- So I moved @documentencoding before @settitle when it was using some special characters... but I now see emacs did transform the characters in the document too. And now I can: paul@jacko:~/gpc$ rm a.out hello paul@jacko:~/gpc$ gpc -o hello ../gpc2/gcc-3.4.6/gcc/p/demos/hello.pas paul@jacko:~/gpc$ ls -lh total 548K -rwxrwxr-x 1 paul paul 546K mar  6 14:21 hello paul@jacko:~/gpc$ ./hello Hello, world. paul@jacko:~/gpc$ gpc ../gpc2/gcc-3.4.6/gcc/p/demos/readdirdemo.pas ../gpc2/gcc-3.4.6/gcc/p/demos/readdirdemo.pas:31: erreur: module/unit interface `GPC' could not be imported paul@jacko:~/gpc$ LANG=C gpc ../gpc2/gcc-3.4.6/gcc/p/demos/readdirdemo.pas ../gpc2/gcc-3.4.6/gcc/p/demos/readdirdemo.pas:31: error: module/unit interface `GPC' could not be imported paul@jacko:~/gpc$ Will need to figure out what to do to make that working.