uwsgi 2.0.20与CPython 3.10.4环境下执行uwsgi.cache_get报PY_SSIZE_T_CLEAN宏未定义错误的自定义修复方法问询

Absolutely! You can totally work around this PY_SSIZE_T_CLEAN error by defining the macro directly in your Dockerfile when building uWSGI. Let me walk you through how to do this properly:

Option 1: Install uWSGI via pip with the macro #

When installing uWSGI through pip in your Dockerfile, you can pass the macro definition using the CFLAGS environment variable. This ensures the macro is included during the compilation process:

# Either set the environment variable first
ENV CFLAGS="-DPY_SSIZE_T_CLEAN"
RUN pip install uwsgi==2.0.20

# Or pass it directly in the install command (more concise)
RUN CFLAGS="-DPY_SSIZE_T_CLEAN" pip install uwsgi==2.0.20

Option 2: Compile uWSGI from source with the macro #

If you prefer building uWSGI directly from its source code, you can still inject the macro via CFLAGS during the make step:

RUN git clone https://github.com/unbit/uwsgi.git && \
    cd uwsgi && \
    git checkout 2.0.20 && \
    CFLAGS="-DPY_SSIZE_T_CLEAN" make && \
    cp uwsgi /usr/local/bin/

Why this works #

The error happens because Python 3.8+ introduced stricter requirements for certain C API functions (like those used in uWSGI's cache module). It requires the PY_SSIZE_T_CLEAN macro to be defined before including Python headers to enable safer formatting for string operations. Since older uWSGI versions (including 2.0.20) don't include this macro by default, manually adding it during compilation bridges the compatibility gap.

This workaround is reliable—it directly addresses the missing macro that Python's C API expects. Even if the official uWSGI package hasn't been updated to fix this, injecting the macro in your Docker build will make your setup fully compatible with CPython 3.10.4. Just make sure to test your uwsgi.cache_get call after building the image to confirm the error is gone.

内容的提问来源于stack exchange，提问作者pfizer