更新后的Ubuntu cmake错误

Question

在将cmake更新到3.12.1版本后，我发现了错误

CMake Error at /usr/local/share/cmake-3.12/Modules/CMakeDetermineSystem.cmake:174 (file):
  file attempted to write a file:
  /home/wow/TrinityCore/CMakeFiles/CMakeOutput.log into a source directory.
Call Stack (most recent call first):
  CMakeLists.txt:19 (project)


CMake Error: CMake was unable to find a build program corresponding to "Unix Makefiles".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
CMake Error: CMAKE_C_COMPILER not set, after EnableLanguage
CMake Error: CMAKE_CXX_COMPILER not set, after EnableLanguage
-- Configuring incomplete, errors occurred!

make安装

GNU Make 3.81
Copyright (C) 2006  Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.

This program built for x86_64-pc-linux-gnu

g++也是。Ubuntu版本14.04.5

有什么帮助或想法吗？

谢谢!

Answer 1

正如评论中已经指出的，

file attempted to write a file ... into a source directory

是项目的CMAKE_DISABLE_SOURCE_CHANGES变量集在CMakeLists.txt中的结果。此设置激活检查，CMake项目不会在源目录下创建任何文件。(对此变量设置的更精确描述见that answer中)。

通常，设置CMAKE_DISABLE_SOURCE_CHANGES变量伴随着设置CMAKE_DISABLE_IN_SOURCE_BUILD变量，具有字面意义：

项目不应该在源代码中构建.

解决方案是在构建目录中构建与源目录不同的项目out-of-source，。

以这种方式：

cd <project-dir>
mkdir build
cd build
cmake ..