{未解决}[OHOS ERROR]‘PR_CAP_AMBIENT’ undeclared (first use in this function)（暂时屏蔽处理）

Tsui Ka Chai45367

已于 2022-08-27 09:52:07 修改

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文章标签： linux

于 2022-08-27 09:51:04 首次发布

本文链接：https://blog.youkuaiyun.com/r7cncom/article/details/126554505

本文介绍了解决在OpenHarmony环境下SetAmbientCapability函数编译时遇到的未声明标识符错误的过程。该错误涉及到prctl宏的使用，并在特定条件下出现。通过检查宏定义及包含文件可以定位并解决此问题。

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int SetAmbientCapability(int cap)
{
#if ((defined __LINUX__) || (!defined OHOS_LITE))
    if (prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_RAISE, cap, 0, 0)) {
        INIT_LOGE("prctl PR_CAP_AMBIENT failed: %d", errno);
        return -1;
    }
#endif
    return 0;
}

报错内容

[OHOS ERROR] ../../../base/startup/init_lite/services/src/init_adapter.c: In function ‘SetAmbientCapability’:
[OHOS ERROR] ../../../base/startup/init_lite/services/src/init_adapter.c:55:15: error: ‘PR_CAP_AMBIENT’ undeclared (first use in this function)
[OHOS ERROR]      if (prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_RAISE, cap, 0, 0)) {
[OHOS ERROR]                ^
[OHOS ERROR] ../../../base/startup/init_lite/services/src/init_adapter.c:55:15: note: each undeclared identifier is reported only once for each function it appears in
[OHOS ERROR] ../../../base/startup/init_lite/services/src/init_adapter.c:55:31: error: ‘PR_CAP_AMBIENT_RAISE’ undeclared (first use in this function)
[OHOS ERROR]      if (prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_RAISE, cap, 0, 0)) {
[OHOS ERROR]                                ^
[OHOS ERROR] you can check build log in /home/openharmony/out/MyBoard/My_Product_demo/build.log
[OHOS ERROR] command: "/home/openharmony/prebuilts/build-tools/linux-x86/bin/ninja -w dupbuild=warn -C /home/openharmony/out/MyBoard/My_Product_demo -v" failed
[OHOS ERROR] return code: 1
[OHOS ERROR] execution path: /home/openharmony

英文翻译这个是SetAmbientCapability 判断环境能力

未找到原因。。。。。暂时屏蔽

未找到原因。。。。。暂时屏蔽未找到原因。。。。。暂时屏蔽

未找到原因。。。。。暂时屏蔽

int SetAmbientCapability(int cap)
// {
// #if ((defined __LINUX__) || (!defined OHOS_LITE))
//     if (prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_RAISE, cap, 0, 0)) {
//         INIT_LOGE("prctl PR_CAP_AMBIENT failed: %d", errno);
//         return -1;
//     }
// #endif
//     return 0;
// }

未找到原因。。。。。暂时屏蔽

/base/startup/init_lite/services/src/init_adapter.c 50行