cmake config_error ai_generated true

CMake警告（开发）：未设置策略CMP0077：option()尊重普通变量。运行"cmake --help-policy CMP0077"查看策略详情。使用cmake_policy命令设置策略并抑制此警告。

CMake Warning (dev): Policy CMP0077 is not set: option() honors normal variables. Run "cmake --help-policy CMP0077" for policy details. Use the cmake_policy command to set the policy and suppress this warning.

ID: cmake/policy-cmp0077-not-set

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90%修复率
84%置信度
1证据数
2023-07-01首次发现

版本兼容性

版本状态引入弃用备注
CMake 3.13 active — — —
CMake 3.14 active — — —
CMake 3.20 active — — —

根因分析

未显式设置CMake策略CMP0077，导致当存在同名普通变量时，option()行为不一致。

English

CMake policy CMP0077 is not explicitly set, causing option() to behave inconsistently when a normal variable with the same name exists.

generic

官方文档

https://cmake.org/cmake/help/latest/policy/CMP0077.html

解决方案

  1. 在CMakeLists.txt开头设置策略为NEW：cmake_policy(SET CMP0077 NEW)
  2. 如果需要旧行为，设置为OLD：cmake_policy(SET CMP0077 OLD)，但不推荐用于新项目。

无效尝试

常见但无效的做法:

  1. 40% 失败

    The warning may lead to subtle bugs where option() does not behave as expected, especially in cache variable scenarios.

  2. 50% 失败

    OLD behavior may break modern CMake patterns and cause unexpected cache variable behavior.