psql: can't get readline support

Hello psql-novice
I am trying to compile postgres with readline support, but no luck, even if
I am pretty sure I have readline available...
Stackoverflow question is here with all details
*https://stackoverflow.com/questions/60855645/psql-cant-compile-with-readline-support
<https://stackoverflow.com/questions/60855645/psql-cant-compile-with-readline-support>*

denis ~/CProjects/postgres (REL_12_STABLE) $ pkg-config --libs
readline-L/usr/local/lib -lreadline

denis ~/CProjects/postgres (REL_12_STABLE) $ pwd
/home/denis/CProjects/postgres

./configure --with-readline=yes
...
checking readline/readline.h usability... yes

...
make
sudo make install

But then when using it:

denis ~/CProjects/postgres (REL_12_STABLE) $ which
psql/home/denis/CProjects/postgres/bin/psql

denis ~/CProjects/postgres (REL_12_STABLE) $ psql -d postgres
psql (12.0)
Type "help" for help.

postgres=# \s
history is not supported by this installation

System: Linux 4.15
Readline version: 8.0
gcc (GCC) 9.2.0

Could someone kindly help?
Regards
Denis