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问题概述：在安装基于pyproject.toml的项目中，出现了Building wheel for pywinpty错误，提示编译失败。
解决方案：该错误提示中提到了找不到i686-pc-windows-msvc目标，并建议下载该目标。因此，首先需要检查是否安装了合适的Rust目标。可以使用rustup来检查和安装目标。在命令行中输入以下命令：
rustup target add i686-pc-windows-msvc
该命令将下载并安装缺少的目标。 如果仍然遇到错误，可能是由于缺少某些依赖项。可以尝试在命令行中手动构建pywinpty项目以查看详细错误信息。在命令行中进入pywinpty项目目录，并输入以下命令：
cargo build --release
此命令将对该项目进行手动构建并输出详细错误信息。可能需要安装缺少的依赖项或更新Rust版本。 案例： 假设在安装一个基于pyproject.toml的项目时，出现了Building wheel for pywinpty错误。命令行输出如下：
Building wheel for pywinpty (pyproject.toml) ... error error: subprocess-exited-with-error × Building wheel for pywinpty (pyproject.toml) did not run successfully.
exit code: 1 ╰─> [35 lines of output]
Running `maturin pep517 build-wheel -i c:\users\52379\appdata\local\programs\python\python38-32\python.exe --compatibility off --target i686-pc-windows-msvc`
馃摝 Including license file "C:\Users\52379\AppData\Local\Temp\pip-install-7sdddw_9\pywinpty_92cee6ebbe37470e8f2c596818e29fae\LICENSE.txt"
馃嵐 Building a mixed python/rust project
馃敆 Found pyo3 bindings
馃悕 Found CPython 3.8 at c:\users\52379\appdata\local\programs\python\python38-32\python.exe
Compiling autocfg v1.1.0
Compiling windows_x86_64_msvc v0.52.3
Compiling target-lexicon v0.12.14
Compiling once_cell v1.19.0
Compiling proc-macro2 v1.0.78
Compiling unicode-ident v1.0.12
Compiling windows_i686_msvc v0.52.3
Compiling windows_i686_msvc v0.48.5
Compiling rustix v0.38.31
Compiling bitflags v2.4.0
Compiling num-traits v0.2.17
Compiling lock_api v0.4.11
Compiling parking_lot_core v0.9.9
Compiling either v1.9.0
Compiling libc v0.2.153
error[E0463]: can't find crate for `core`
|
= note: the `i686-pc-windows-msvc` target may not be installed
= help: consider downloading the target with `rustup target add i686-pc-windows-msvc`
error[E0463]: can't find crate for `compiler_builtins`
For more information about this error, try `rustc --explain E0463`.
error: could not compile `windows_i686_msvc` (lib) due to 2 previous errors
warning: build failed, waiting for other jobs to finish...
error: could not compile `windows_i686_msvc` (lib) due to 2 previous errors
馃挜 maturin failed
Caused by: Failed to build a native library through cargo
Caused by: Cargo build finished with "exit code: 101": `"cargo" "rustc" "--target" "i686-pc-windows-msvc" "--message-format" "json-render-diagnostics" "--manifest-path" "C:\\Users\\52379\\AppData\\Local\\Temp\\pip-install-7sdddw_9\\pywinpty_92cee6ebbe37470e8f2c596818e29fae\\Cargo.toml" "--release" "--lib"`
Error: command ['maturin', 'pep517', 'build-wheel', '-i', 'c:\\users\\52379\\appdata\\local\\programs\\python\\python38-32\\python.exe', '--compatibility', 'off', '--target', 'i686-pc-windows-msvc'] returned non-zero exit status 1
根据命令行输出，我们可以看到i686-pc-windows-msvc目标未安装。因此，在命令行中输入以下命令：
rustup target add i686-pc-windows-msvc
接下来，重新运行项目安装命令，这个错误就会被解决。
