mozilla / libprio

Running pip install prio results in the following error on Windows: Cannot open include file: 'blapit.h'

Environment: Windows 10; Python 3.10.0; pip 21.2.3; (tried it on multiple windows-pc's). It works on Linux,

The full error:

Collecting prio
  Downloading prio-0.2.tar.gz (207 kB)
     |████████████████████████████████| 207 kB 3.3 MB/s
Using legacy 'setup.py install' for prio, since package 'wheel' is not installed.
Installing collected packages: prio
    Running setup.py install for prio ... error
    ERROR: Command errored out with exit status 1:
     command: 'C:\Users\xxxxx\test\venv\Scripts\python.exe' -u -c 'import io, os, sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\xxxxx\\AppData\\Local\\Temp\\pip-install-xl6_jnan\\prio_4b0d94ba5e1c42df93abeac942cbd6b6\\setup.py'"'"'; __file__='"'"'C:\\Users\\xxxxx\\AppData\\Local\\Temp\\pip-install-xl6_jnan\\prio_4b0d94ba5e1c42df93abeac942cbd6b6\\setup.py'"'"';f = getattr(tokenize, '"'"'open'"'"', open)(__file__) if os.path.exists(__file__) else io.StringIO('"'"'from setuptools import setup; setup()'"'"');code = f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record 'C:\Users\xxxxx\AppData\Local\Temp\pip-record-onq_uk0h\install-record.txt' --single-version-externally-managed --compile --install-headers 'C:\Users\xxxxx\test\venv\include\site\python3.10\prio'
         cwd: C:\Users\xxxxx\AppData\Local\Temp\pip-install-xl6_jnan\prio_4b0d94ba5e1c42df93abeac942cbd6b6\
    Complete output (17 lines):
    running install
    running build
    running build_py
    creating build
    creating build\lib.win-amd64-3.10
    creating build\lib.win-amd64-3.10\prio
    copying prio\libprio.py -> build\lib.win-amd64-3.10\prio
    copying prio\prio.py -> build\lib.win-amd64-3.10\prio
    copying prio\__init__.py -> build\lib.win-amd64-3.10\prio
    running build_ext
    building '_libprio' extension
    creating build\temp.win-amd64-3.10
    creating build\temp.win-amd64-3.10\Release
    C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.29.30133\bin\HostX86\x64\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD -I/usr/include/nspr -I/usr/include/nss -IC:\Users\xxxxx\test\venv\include -IC:\Python310\include -IC:\Python310\Include -IC:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.29.30133\include -IC:\Program Files (x86)\Windows Kits\NETFXSDK\4.8\include\um -IC:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\ucrt -IC:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\shared -IC:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\um -IC:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\winrt -IC:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\cppwinrt /Tclibprio_wrap.c /Fobuild\temp.win-amd64-3.10\Release\libprio_wrap.obj
    libprio_wrap.c
    C:\Users\xxxxxr\AppData\Local\Temp\pip-install-xl6_jnan\prio_4b0d94ba5e1c42df93abeac942cbd6b6\libprio/include/mprio.h(16): fatal error C1083: Cannot open include file: 'blapit.h': No such file or directory
    error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\Community\\VC\\Tools\\MSVC\\14.29.30133\\bin\\HostX86\\x64\\cl.exe' failed with exit code 2
    ----------------------------------------
ERROR: Command errored out with exit status 1: 'C:\Users\xxxxx\test\venv\Scripts\python.exe' -u -c 'import io, os, sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\xxxxx\\AppData\\Local\\Temp\\pip-install-xl6_jnan\\prio_4b0d94ba5e1c42df93abeac942cbd6b6\\setup.py'"'"'; __file__='"'"'C:\\Users\\xxxxx\\AppData\\Local\\Temp\\pip-install-xl6_jnan\\prio_4b0d94ba5e1c42df93abeac942cbd6b6\\setup.py'"'"';f = getattr(tokenize, '"'"'open'"'"', open)(__file__) if os.path.exists(__file__) else io.StringIO('"'"'from setuptools import setup; setup()'"'"');code = f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record 'C:\Users\xxxxx\AppData\Local\Temp\pip-record-onq_uk0h\install-record.txt' --single-version-externally-managed --compile --install-headers 'C:\Users\xxxxx\test\venv\include\site\python3.10\prio' Check the logs for full command output.

Unfortunately, the library has a hard dependency on nss and nspr as per the setup:

libprio/python/setup.py

Line 40 in b9de0de

libraries=["mprio", "mpi", "msgpackc", "nss3", "nspr4"],

I don't think there's an easy solution here in terms of building and distributing the package for Windows here. It might be possible to build the C-library using CMake, but it would take quite a bit of effort to port things over from scons (and that doesn't solve the Cython module either).

I'd recommend taking a look at libprio-rs which is implemented in pure Rust, and should therefore compile nicely on Windows. It has similar cryptographic semantics and should be more efficient due to some algorithmic modifications.

pip install prio not working on Windows