点子版本：22.3.1
Python版本：3.9.11
操作系统：Windows 10
我创建了我的 python 项目并使用 venv 作为虚拟环境。
其他pip包都安装好了，但只有psycopg2失败了。
日志说有问题
./psycopg/win32_support.h:43:6：错误：#elif 没有表达式。
我认为 msys2 可能会导致这个问题。
pip install psycopg2-binary(.venv) PS C:\Users\my\proj> pip install psycopg2
Collecting psycopg2
Using cached psycopg2-2.9.5.tar.gz (384 kB)
Preparing metadata (setup.py) ... done
Building wheels for collected packages: psycopg2
Building wheel for psycopg2 (setup.py) ... error
error: subprocess-exited-with-error
× python setup.py bdist_wheel did not run successfully.
│ exit code: 1
╰─> [44 lines of output]
running bdist_wheel
running build
running build_py
creating build
creating build\lib.mingw_x86_64-3.9
creating build\lib.mingw_x86_64-3.9\psycopg2
copying lib\errorcodes.py -> build\lib.mingw_x86_64-3.9\psycopg2
copying lib\errors.py -> build\lib.mingw_x86_64-3.9\psycopg2
copying lib\extensions.py -> build\lib.mingw_x86_64-3.9\psycopg2
copying lib\extras.py -> build\lib.mingw_x86_64-3.9\psycopg2
copying lib\pool.py -> build\lib.mingw_x86_64-3.9\psycopg2
copying lib\sql.py -> build\lib.mingw_x86_64-3.9\psycopg2
copying lib\tz.py -> build\lib.mingw_x86_64-3.9\psycopg2
copying lib\_ipaddress.py -> build\lib.mingw_x86_64-3.9\psycopg2
copying lib\_json.py -> build\lib.mingw_x86_64-3.9\psycopg2
copying lib\_range.py -> build\lib.mingw_x86_64-3.9\psycopg2
copying lib\__init__.py -> build\lib.mingw_x86_64-3.9\psycopg2
running build_ext
building 'psycopg2._psycopg' extension
creating build\temp.mingw_x86_64-3.9
creating build\temp.mingw_x86_64-3.9\psycopg
gcc -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -march=x86-64 -mtune=generic -O2 -pipe -march=x86-64 -mtune=generic -O2 -pipe -DPSYCOPG_VERSION=2.9.5 (dt dec pq3 ext lo64) -DPSYCOPG_DEBUG=1 -DPG_VERSION_NUM=150001 -DHAVE_LO64=1 -DPSYCOPG_DEBUG=1 -IC:\Users\my\proj\.venv\include -IC:\msys64\mingw64\include\python3.9 -I. -IC:/PROGRA~1/POSTGR~1/15/include -IC:/PROGRA~1/POSTGR~1/15/include/server -c psycopg\adapter_asis.c -o build\temp.mingw_x86_64-3.9\psycopg\adapter_asis.o -O3 -fno-strict-aliasing
In file included from ./psycopg/config.h:164,
from ./psycopg/psycopg.h:38,
from psycopg\adapter_asis.c:28:
./psycopg/win32_support.h:43:6: error: #elif with no expression
43 | #elif
| ^
In file included from ./psycopg/psycopg.h:38,
from psycopg\adapter_asis.c:28:
./psycopg/config.h:108:12: warning: 'pthread_mutex_init' defined but not used [-Wunused-function]
108 | static int pthread_mutex_init(pthread_mutex_t *mutex, void* fake)
| ^~~~~~~~~~~~~~~~~~
It appears you are missing some prerequisite to build the package from source.
You may install a binary package by installing 'psycopg2-binary' from PyPI.
If you want to install psycopg2 from source, please install the packages
required for the build and try again.
For further information please check the 'doc/src/install.rst' file (also at
<https://www.psycopg.org/docs/install.html>).
error: command 'C:\\msys64\\mingw64\\bin\\gcc.exe' failed with exit code 1
[end of output]
note: This error originates from a subprocess, and is likely not a problem with pip.
ERROR: Failed building wheel for psycopg2
Running setup.py clean for psycopg2
Failed to build psycopg2
Installing collected packages: psycopg2
Running setup.py install for psycopg2 ... error
error: subprocess-exited-with-error
× Running setup.py install for psycopg2 did not run successfully.
│ exit code: 1
╰─> [44 lines of output]
running install
running build
running build_py
creating build
creating build\lib.mingw_x86_64-3.9
creating build\lib.mingw_x86_64-3.9\psycopg2
copying lib\errorcodes.py -> build\lib.mingw_x86_64-3.9\psycopg2
copying lib\errors.py -> build\lib.mingw_x86_64-3.9\psycopg2
copying lib\extensions.py -> build\lib.mingw_x86_64-3.9\psycopg2
copying lib\extras.py -> build\lib.mingw_x86_64-3.9\psycopg2
copying lib\pool.py -> build\lib.mingw_x86_64-3.9\psycopg2
copying lib\sql.py -> build\lib.mingw_x86_64-3.9\psycopg2
copying lib\tz.py -> build\lib.mingw_x86_64-3.9\psycopg2
copying lib\_ipaddress.py -> build\lib.mingw_x86_64-3.9\psycopg2
copying lib\_json.py -> build\lib.mingw_x86_64-3.9\psycopg2
copying lib\_range.py -> build\lib.mingw_x86_64-3.9\psycopg2
copying lib\__init__.py -> build\lib.mingw_x86_64-3.9\psycopg2
running build_ext
building 'psycopg2._psycopg' extension
creating build\temp.mingw_x86_64-3.9
creating build\temp.mingw_x86_64-3.9\psycopg
gcc -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -march=x86-64 -mtune=generic -O2 -pipe -march=x86-64 -mtune=generic -O2 -pipe -DPSYCOPG_VERSION=2.9.5 (dt dec pq3 ext lo64) -DPSYCOPG_DEBUG=1 -DPG_VERSION_NUM=150001 -DHAVE_LO64=1 -DPSYCOPG_DEBUG=1 -IC:\Users\my\proj\.venv\include -IC:\msys64\mingw64\include\python3.9 -I. -IC:/PROGRA~1/POSTGR~1/15/include -IC:/PROGRA~1/POSTGR~1/15/include/server -c psycopg\adapter_asis.c -o build\temp.mingw_x86_64-3.9\psycopg\adapter_asis.o -O3 -fno-strict-aliasing
In file included from ./psycopg/config.h:164,
from ./psycopg/psycopg.h:38,
from psycopg\adapter_asis.c:28:
./psycopg/win32_support.h:43:6: error: #elif with no expression
43 | #elif
| ^
In file included from ./psycopg/psycopg.h:38,
from psycopg\adapter_asis.c:28:
./psycopg/config.h:108:12: warning: 'pthread_mutex_init' defined but not used [-Wunused-function]
108 | static int pthread_mutex_init(pthread_mutex_t *mutex, void* fake)
| ^~~~~~~~~~~~~~~~~~
It appears you are missing some prerequisite to build the package from source.
You may install a binary package by installing 'psycopg2-binary' from PyPI.
If you want to install psycopg2 from source, please install the packages
required for the build and try again.
For further information please check the 'doc/src/install.rst' file (also at
<https://www.psycopg.org/docs/install.html>).
error: command 'C:\\msys64\\mingw64\\bin\\gcc.exe' failed with exit code 1
[end of output]
note: This error originates from a subprocess, and is likely not a problem with pip.
error: legacy-install-failure
× Encountered error while trying to install package.
╰─> psycopg2
note: This is an issue with the package mentioned above, not pip.
hint: See above for output from the failure.
尝试以下命令 它对我有用
sudo apt-get update
sudo apt-get -y install python3-pip
sudo apt install libpq-dev python3-dev
pip3 install psycopg2
就我而言，我能够通过首先安装软件包来解决问题：
1）
pip 安装 psycopg2-二进制文件
进而
2）安装：
pip 安装 psycopg2
对于错误：
收集psycopg2 使用缓存的 psycopg2-2.9.9.tar.gz (384 kB) 准备元数据（setup.py）...错误 错误：子进程退出并出现错误
× python setup.py Egg_info 没有运行成功。 │ 退出代码：1