$ uname -a Linux MyMachine 5.4.0-71-generic #79-Ubuntu SMP Wed Mar 24 10:56:57 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
autoreconf -i
autoconf-archive
./configure
Error:
./configure: line 10244: syntax error near unexpected token `-fstack-protector-strong' ./configure: line 10244: `AX_APPEND_COMPILE_FLAGS(-fstack-protector-strong)'
Complete output of ./configure
attached.
You need to switch the order of steps 2 and 3.