Freeciv

I start from a fresh S3_1 branch

$ git log -1
commit c2fc5f4e9a3af36ebd8f908301ea363696756548 (HEAD -> S3_1, origin/S3_1)
Author: Marko Lindqvist <cazfi74@gmail.com>
Date:   Wed Apr 13 03:18:07 2022 +0300

I have errors with configure : 'text' is not a recognized option but 'tex' is.

I cannot build AI modules

  ./configure  --enable-ai-modules=yes 

  -> the summary says 
 == Server ==
  Build freeciv server:  yes
    AI modules support:    no

I plan to use the following config options :

# S3_1
#  ./configure --enable-gitrev --enable-debug=yes --enable-gprof --enable-client=gtk3.22,qt --with-qt5 --enable-ai-modules=yes --with-default-ai=classic,tex

Reply To alain_bkr

{{{ # S3_1 # ./configure --enable-gitrev --enable-debug=yes --enable-gprof --enable-client=gtk3.22,qt --with-qt5 --enable-ai-modules=yes --with-default-ai=classic,tex }}}

--enable-ai-modules adds support for dynamic ai modules, which you likely don't need now (I take a note that './configure --help' is not clear enough of that option)
If you really want to get it working, config.log would be the file to inspect (or a wild guess is that you would need explicit --enable-shared to support module building)
To have tex built in statically (not as a dynamic module), use --enable-ai-static=classic,tex
I recommend using --with-qtver=qt5 instead of deprecated --with-qt5