/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd:4:18: error: unknown enumerated scalar

[blazehu]

I try to install ujson on my mac
Environment:
mac 10.14.3
python 3.7.2

Looking in indexes: http://pypi.douban.com/simple
Collecting ujson
  Downloading http://pypi.doubanio.com/packages/16/c4/79f3409bc710559015464e5f49b9879430d8f87498ecdc335899732e5377/ujson-1.35.tar.gz (192kB)
    100% |████████████████████████████████| 194kB 509kB/s
Installing collected packages: ujson
  Running setup.py install for ujson ... error
    Complete output from command /Users/huyuhan/.pyenv/versions/3.7.2/envs/sanic_demo/bin/python -u -c "import setuptools, tokenize;__file__='/private/var/folders/67/375276sx6hv0nln1whwm5syh0000gn/T/pip-install-ua8r4a3f/ujson/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /private/var/folders/67/375276sx6hv0nln1whwm5syh0000gn/T/pip-record-ygmo4al4/install-record.txt --single-version-externally-managed --compile --install-headers /Users/huyuhan/.pyenv/versions/3.7.2/envs/sanic_demo/include/site/python3.7/ujson:
    Warning: 'classifiers' should be a list, got type 'filter'
    running install
    running build
    running build_ext
    building 'ujson' extension
    creating build
    creating build/temp.macosx-10.14-x86_64-3.7
    creating build/temp.macosx-10.14-x86_64-3.7/python
    creating build/temp.macosx-10.14-x86_64-3.7/lib
    clang -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/include -I./python -I./lib -I/Users/huyuhan/.pyenv/versions/3.7.2/envs/sanic_demo/include -I/Users/huyuhan/.pyenv/versions/3.7.2/include/python3.7m -c ./python/ujson.c -o build/temp.macosx-10.14-x86_64-3.7/./python/ujson.o -D_GNU_SOURCE
    clang -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/include -I./python -I./lib -I/Users/huyuhan/.pyenv/versions/3.7.2/envs/sanic_demo/include -I/Users/huyuhan/.pyenv/versions/3.7.2/include/python3.7m -c ./python/objToJSON.c -o build/temp.macosx-10.14-x86_64-3.7/./python/objToJSON.o -D_GNU_SOURCE
    ./python/objToJSON.c:154:11: warning: initializing 'char *' with an expression of type 'const char *' discards qualifiers [-Wincompatible-pointer-types-discards-qualifiers]
        char *data = PyUnicode_AsUTF8AndSize(obj, &len);
              ^      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    1 warning generated.
    clang -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/include -I./python -I./lib -I/Users/huyuhan/.pyenv/versions/3.7.2/envs/sanic_demo/include -I/Users/huyuhan/.pyenv/versions/3.7.2/include/python3.7m -c ./python/JSONtoObj.c -o build/temp.macosx-10.14-x86_64-3.7/./python/JSONtoObj.o -D_GNU_SOURCE
    clang -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/include -I./python -I./lib -I/Users/huyuhan/.pyenv/versions/3.7.2/envs/sanic_demo/include -I/Users/huyuhan/.pyenv/versions/3.7.2/include/python3.7m -c ./lib/ultrajsonenc.c -o build/temp.macosx-10.14-x86_64-3.7/./lib/ultrajsonenc.o -D_GNU_SOURCE
    clang -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/include -I./python -I./lib -I/Users/huyuhan/.pyenv/versions/3.7.2/envs/sanic_demo/include -I/Users/huyuhan/.pyenv/versions/3.7.2/include/python3.7m -c ./lib/ultrajsondec.c -o build/temp.macosx-10.14-x86_64-3.7/./lib/ultrajsondec.o -D_GNU_SOURCE
    creating build/lib.macosx-10.14-x86_64-3.7
    clang -bundle -undefined dynamic_lookup -L/usr/local/opt/readline/lib -L/usr/local/opt/readline/lib -L/usr/local/opt/openssl/lib -L/Users/huyuhan/.pyenv/versions/3.7.2/lib -L/usr/local/opt/readline/lib -L/usr/local/opt/readline/lib -L/usr/local/opt/openssl/lib -L/Users/huyuhan/.pyenv/versions/3.7.2/lib build/temp.macosx-10.14-x86_64-3.7/./python/ujson.o build/temp.macosx-10.14-x86_64-3.7/./python/objToJSON.o build/temp.macosx-10.14-x86_64-3.7/./python/JSONtoObj.o build/temp.macosx-10.14-x86_64-3.7/./lib/ultrajsonenc.o build/temp.macosx-10.14-x86_64-3.7/./lib/ultrajsondec.o -o build/lib.macosx-10.14-x86_64-3.7/ujson.cpython-37m-darwin.so
    ld: malformed file
    /Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd:4:18: error: unknown enumerated scalar
    platform:        zippered
                     ^~~~~~~~
     file '/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd'
    clang: error: linker command failed with exit code 1 (use -v to see invocation)
    error: command 'clang' failed with exit status 1

    ----------------------------------------
Command "/Users/huyuhan/.pyenv/versions/3.7.2/envs/sanic_demo/bin/python -u -c "import setuptools, tokenize;__file__='/private/var/folders/67/375276sx6hv0nln1whwm5syh0000gn/T/pip-install-ua8r4a3f/ujson/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /private/var/folders/67/375276sx6hv0nln1whwm5syh0000gn/T/pip-record-ygmo4al4/install-record.txt --single-version-externally-managed --compile --install-headers /Users/huyuhan/.pyenv/versions/3.7.2/envs/sanic_demo/include/site/python3.7/ujson" failed with error code 1 in /private/var/folders/67/375276sx6hv0nln1whwm5syh0000gn/T/pip-install-ua8r4a3f/ujson/

[ScienceIsNeato]

If you are running on Mojave, you will need to install the MacOS headers in the base system:

sudo installer -pkg /Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkg -target /