什么是“执行测试CMAKE_HAVE_LIBC_PTHREAD"?失败实际上是什么意思? [英] What does "Performing Test CMAKE_HAVE_LIBC_PTHREAD" failed actually mean?

问题描述

cmake的部分输出如下所示:

The cmake partial output looks like this:

-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed

推荐答案

线条

-- Looking for pthread.h
-- Looking for pthread.h - found
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found

是类似呼叫的输出

find_package(Threads)

许多要使用线程相关功能(例如 pthread_create )的CMake项目在脚本 CMakeLists.txt 中使用了此调用.

This call is used in a script CMakeLists.txt by many CMake projects which want to use threads-related functionality (like pthread_create).

处理此调用时，CMake(通过 FindThreads.cmake 脚本)尝试确定当前平台的线程支持的种类.

When process this call, CMake (by means of FindThreads.cmake script) tries to determine kind of thread support for the current platform.

检查寻找pthread.h 是不言自明的:CMake检查标头 pthread.h 是否存在并且可用.

The check Looking for pthread.h is self-explanatory: CMake checks whether header pthread.h exists and available.

检查性能测试CMAKE_HAVE_LIBC_PTHREAD 是关于线程支持功能是直接编译到libc库中，还是需要链接其他库(如 -lpthread ).

The check Performing Test CMAKE_HAVE_LIBC_PTHREAD is about whether thread support functions are compiled into libc library directly, or one need to link additional libraries (like -lpthread).

检查在pthreads中查找pthread_create 会尝试在其中找到 pthreads 库并在其中查找功能 pthread_create .

The check Looking for pthread_create in pthreads tries to find pthreads library and function pthread_create in it.

检查在pthread中查找pthread_create 试图在其中找到 pthread 库和函数 pthread_create .

The check Looking for pthread_create in pthread tries to find pthread library and function pthread_create in it.

该特定输出可以解释为:

That particular output could be interpreted as:

平台通过提供标头 pthread.h 和库 pthread 来支持线程.

此输出对于类似Unix的系统是常见的.尽管失败"，和未找到"话说来，这是非常好的输出.

This output is common for Unix-like systems. Despite "Failed" and "not found" words, this is perfectly good output.

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