cmake install_error ai_generated true

CMake 错误：install(EXPORT "MyTargets" ...) 在导出集中多次包含了目标 "mylib"。

CMake Error: install(EXPORT "MyTargets" ...) includes target "mylib" more than once in the export set.

ID: cmake/export-duplicate-target

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85%修复率
88%置信度
1证据数
2024-02-10首次发现

版本兼容性

版本状态引入弃用备注
CMake 3.20 active — — —
CMake 3.26 active — — —
CMake 3.28 active — — —

根因分析

同一个目标被多次列在写入同一导出集的 install(TARGETS ...) 命令中，或者通过 install 和 export() 调用将目标添加到了同一导出集。

English

The same target is listed in multiple install(TARGETS ...) commands that write to the same export set, or a target is added to the same export set via both install and export() calls.

generic

解决方案

  1. 将所有针对同一导出集的 install(TARGETS) 合并为单个 install(TARGETS ... EXPORT MyTargets) 调用，列出所有目标。
  2. 使用 NAMESPACE 和带有 COMPONENT 的 install(EXPORT) 进行拆分，但确保每个目标在每个导出集中只出现一次。

无效尝试

常见但无效的做法:

  1. Remove one of the install(TARGETS) lines entirely 35% 失败

    If that target needs to be installed for both runtime and development, removing one line might break the install step.

  2. Use different export names for each install(TARGETS) call 25% 失败

    This creates separate export sets, which may not be what the downstream project expects (they'd need to include both).