macOS 10.15.7
env SDKROOT="/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk" CFLAGS="-I/usr/local/opt/openssl/include -I/usr/local/opt/readline/include -I/Library/Developer/CommandLineT
ools/SDKs/MacOSX.sdk/usr/include" CPPFLAGS="-I/usr/local/opt/zlib/include" LDFLAGS="-L/usr/local/opt/openssl/lib -L/usr/local/opt/readline/lib" asdf install python 3.9.0
python-build 3.9.0 /Users/ficapy/.asdf/installs/python/3.9.0
python-build: use openssl@1.1 from homebrew
python-build: use readline from homebrew
Downloading Python-3.9.0.tar.xz...
-> https://www.python.org/ftp/python/3.9.0/Python-3.9.0.tar.xz
Installing Python-3.9.0...
python-build: use readline from homebrew
python-build: use zlib from xcode sdk
Installed Python-3.9.0 to /Users/ficapy/.asdf/installs/python/3.9.0