Install python with pyenv on mac Big Sur

After I upgrade to Big sur, I can't install any python on my machine.

BUILD FAILED (OS X 11.1 using python-build 1.2.16-17-ga7afd20b)

Inspect or clean up the working tree at /var/folders/ns/83bbk98j6wx9yhjpn9z31k4h0000gn/T/python-build.20210321080744.39363
Results logged to /var/folders/ns/83bbk98j6wx9yhjpn9z31k4h0000gn/T/python-build.20210321080744.39363.log

Last 10 log lines:
                                                     ^
clang -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include   -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include   -std=c99 -Wextra -Wno-unused-result -Wno-unused-parameter -Wno-missing-field-initializers -Wstrict-prototypes -Werror=implicit-function-declaration  -I./Include/internal  -I. -I./Include -I/usr/local/opt/readline/include -I/usr/local/opt/readline/include -I/Users/poioit/.pyenv/versions/3.8.1/include  -I/usr/local/opt/readline/include -I/usr/local/opt/readline/include -I/Users/poioit/.pyenv/versions/3.8.1/include   -DPy_BUILD_CORE_BUILTIN  -c ./Modules/errnomodule.c -o Modules/errnomodule.o
./Modules/posixmodule.c:9084:15: error: implicit declaration of function 'sendfile' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
        ret = sendfile(in, out, offset, &sbytes, &sf, flags);
              ^
clang -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include   -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include   -std=c99 -Wextra -Wno-unused-result -Wno-unused-parameter -Wno-missing-field-initializers -Wstrict-prototypes -Werror=implicit-function-declaration  -I./Include/internal  -I. -I./Include -I/usr/local/opt/readline/include -I/usr/local/opt/readline/include -I/Users/poioit/.pyenv/versions/3.8.1/include  -I/usr/local/opt/readline/include -I/usr/local/opt/readline/include -I/Users/poioit/.pyenv/versions/3.8.1/include   -DPy_BUILD_CORE_BUILTIN  -c ./Modules/pwdmodule.c -o Modules/pwdmodule.o
1 error generated.
make: *** [Modules/posixmodule.o] Error 1
make: *** Waiting for unfinished jobs....

After some digging, I found a workable solution. It works for me. You can change to the version you want to install.

CFLAGS="-I$(brew --prefix openssl)/include -I$(brew --prefix bzip2)/include -I$(brew --prefix readline)/include -I$(xcrun --show-sdk-path)/usr/include" LDFLAGS="-L$(brew --prefix openssl)/lib -L$(brew --prefix readline)/lib -L$(brew --prefix zlib)/lib -L$(brew --prefix bzip2)/lib" pyenv install --patch 3.8.2 < <(curl -sSL https://github.com/python/cpython/commit/8ea6353.patch\?full_index\=1)

pyenv install --list
pyenv install 3.8.2