Error in installing Python 3.6.8 for MacBook pyenv [Solved]

Solution:

1.install   Pyenv and pyenv virtualenv

brew install pyenv
git clone https://github.com/yyuu/pyenv-virtualenv.git ~/.pyenv/plugins/pyenv-virtualenv

Error in pyenv installation of Python 3.6.8


    else if(0 == _NSGetExecutablePath(execpath, &nsexeclength) && execpath[0] == SEP) {
                                                ^~~~~~~~~~~~~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/mach-o/dyld.h:98:54: note: passing argument to parameter 'bufsize' here
extern int _NSGetExecutablePath(char* buf, uint32_t* bufsize)                 __OSX_AVAILABLE_STARTING(__MAC_10_2, __IPHONE_2_0);
                                                     ^
clang -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include   -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include   -std=c99 -Wextra -Wno-unused-result -Wno-unused-parameter -Wno-missing-field-initializers -Wstrict-prototypes   -I. -I./Include -I/usr/local/opt/readline/include -I/usr/local/opt/readline/include -I/usr/local/opt/[email protected]/include -I/Users/guangcui/.pyenv/versions/3.6.8/include  -I/usr/local/opt/readline/include -I/usr/local/opt/readline/include -I/usr/local/opt/[email protected]/include -I/Users/guangcui/.pyenv/versions/3.6.8/include   -DPy_BUILD_CORE  -c ./Modules/posixmodule.c -o Modules/posixmodule.o
clang -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include   -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include   -std=c99 -Wextra -Wno-unused-result -Wno-unused-parameter -Wno-missing-field-initializers -Wstrict-prototypes   -I. -I./Include -I/usr/local/opt/readline/include -I/usr/local/opt/readline/include -I/usr/local/opt/[email protected]/include -I/Users/guangcui/.pyenv/versions/3.6.8/include  -I/usr/local/opt/readline/include -I/usr/local/opt/readline/include -I/usr/local/opt/[email protected]/include -I/Users/guangcui/.pyenv/versions/3.6.8/include   -DPy_BUILD_CORE  -c ./Modules/errnomodule.c -o Modules/errnomodule.o
./Modules/posixmodule.c:8210:15: error: implicit declaration of function 'sendfile' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
        ret = sendfile(in, out, offset, &sbytes, &sf, flags);
              ^
./Modules/posixmodule.c:10432:5: warning: code will never be executed [-Wunreachable-code]
    Py_FatalError("abort() called from Python code didn't abort!");
    ^~~~~~~~~~~~~

processing method

1. Reinstall zlib bzip2

brew reinstall zlib bzip2

2. Based on the shell used, you can update . Zshrc or . Bashrc (if there is no such text, you can suggest the file in the ~ directory, enter the following content, save and restart the shell) 

export PATH="$HOME/.pyenv/bin:$PATH"
export PATH="/usr/local/bin:$PATH"

eval "$(pyenv init -)"
eval "$(pyenv virtualenv-init -)"
export LDFLAGS="-L/usr/local/opt/zlib/lib -L/usr/local/opt/bzip2/lib"
export CPPFLAGS="-I/usr/local/opt/zlib/include -I/usr/local/opt/bzip2/include"

3. Enter the following installation command. If you need to change the version, you can change 3.6.8 to another version

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 3.6.8 < <(curl -sSL https://github.com/python/cpython/commit/8ea6353.patch\?full_index\=1)

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