I am trying to build the vm with RS external plugins I generated. I am getting some pushback:

rabbit@ganymede:~/vm-dev/opensmalltalk-vm/build.linux64x64/squeak.cog.spur/build$ ./mvm
clean? y
checking for gcc... clang
checking whether the C compiler works... no
configure: error: in `/home/rabbit/vm-dev/opensmalltalk-vm/build.linux64x64/squeak.cog.spur/build':
configure: error: C compiler cannot create executables
See `config.log' for more details

How could I resolve this issue? I have the latest gcc, I think:

rabbit@ganymede:~/vm-dev/opensmalltalk-vm/build.linux64x64/squeak.cog.spur/build$ gcc --version
gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0

I appreciate!