Problems in the configuration of checkmate

[Revue-Starlight-Topstar]

Hi @NishitaDesai
Dear Checkmate team,
I tried to install checkmate on [Ubuntu 21.10], but the following errors persisted:

customer@customer-Super-Server:~/apps/checkmate2-master$ ./configure
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /usr/bin/mkdir -p
checking for gawk... no
checking for mawk... mawk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking for g++... g++
checking whether the C++ compiler works... yes
checking for C++ compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C++ compiler... yes
checking whether g++ accepts -g... yes
checking whether make supports the include directive... yes (GNU style)
checking dependency style of g++... gcc3
./configure: line 3448: syntax error near unexpected token `ac_ext=cpp'
./configure: line 3448: `ac_ext=cpp'

My gcc version is 8.5.0. What should I do?
Many thanks.

[krolbiecki]

Hi, have you solved it? Can you send configure file?