In this recipe, we generate print_info.c from the template print_info.c.in
by emulating the CMake function
configure_file
with a custom Python script.
The goal of this recipe is to learn how we can generate source code at configure time.
We should point out that this recipe has a serious limitation and cannot
emulate
configure_file
fully. The approach that we present here cannot generate an automatic
dependency which would regenerate print_info.c at build time. In other words,
if you remove the generated print_info.c after the configure step, this file
will not be regenerated and the build step will fail. To proper mimic the
behavior of
configure_file
we would require
add_custom_command
and
add_custom_target,
which we will use in the subsequent Recipe 3, Generating source code at build
time using Python, where we will overcome this limitation.