Are some flags and installing programs needed for init?

[quwac]

In other PC I failed to install Python.
I got success by adding flags.
Are they needed?

SYSTEM_VERSION_COMPAT=1
export SYSTEM_VERSION_COMPAT
CFLAGS="-I$(brew --prefix openssl@3)/include -I$(brew --prefix bzip2)/include -I$(brew --prefix readline)/include -I$(xcrun --show-sdk-path)/usr/include"
export CFLAGS
LDFLAGS="-L$(brew --prefix openssl@3)/lib -L$(brew --prefix readline)/lib -L$(brew --prefix zlib)/lib -L$(brew --prefix bzip2)/lib"
export LDFLAGS