When I try to compile the reproducible project with with_c.f90 & c_code.c file in src directory and run fpm build --verbose, the log which shows archive being generated has two object files in command ...

when i'm building driver.cpp, why am I getting undefined reference error. I'm new to c++ and this is my first code using header files. /usr/bin/ld: /tmp/ccyzS6Dd.o ...