如何在 Linux ubuntu 中设置 C++ 环境变量？
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How to set C++ environment variable in Linux ubuntu?
提问by HaggarTheHorrible
I just installed Ubuntu on my Virtualbox on Windows.
我刚刚在 Windows 上的 Virtualbox 上安装了 Ubuntu。
I was trying to install cmake and the installation guide in the cmake website asked me to do the following steps
我正在尝试安装 cmake 并且 cmake 网站中的安装指南要求我执行以下步骤
./bootstrap
make
make install
But when I just did the ./bootstrapcommand I get the following list of errors, can anyone suggest me how I can set the C++ compiler on my system. As I just installed Ubuntu perhaps the C++ is not set currently.
但是当我刚刚执行./bootstrap命令时，我得到以下错误列表，谁能建议我如何在我的系统上设置 C++ 编译器。因为我刚刚安装了 Ubuntu，可能当前没有设置 C++。
Kindly help.
请帮忙。
CMake 2.8.1, Copyright 2000-2009 Kitware, Inc. C compiler on this system is: cc Error when bootstrapping CMake: Cannot find appropriate C++ compiler on this system. Please specify one using environment variable CXX. See cmake_bootstrap.log for compilers attempted. Log of errors: /home/vikboy/Downloads/cmake-2.8.1/Bootstrap.cmk/cmake_bootstrap.log
回答by Ignacio Vazquez-Abrams
Install the build-essentialpackages via apt.
build-essential通过 apt安装软件包。
sudo apt-get install build-essential
回答by Kemin Zhou
I am having the same problem. Even I defined the CXX environmental variable correctly.
我有同样的问题。即使我正确定义了 CXX 环境变量。
$CXX --version g++ (GCC) 5.3.0 Copyright (C) 2015 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.
$CXX --version g++ (GCC) 5.3.0 版权所有 (C) 2015 Free Software Foundation, Inc. 这是免费软件；请参阅复制条件的来源。没有保修；甚至不是为了特定目的的适销性或适合性。
I looked at the log file of the ./configure output: Bootstrap.cmk/cmake_bootstrap.log
我查看了 ./configure 输出的日志文件：Bootstrap.cmk/cmake_bootstrap.log
class NeedCXX
{
public:
NeedCXX() { this->Foo = 1; }
int GetFoo() { return this->Foo; }
private:
int Foo;
};
int main()
{
NeedCXX c;
#ifdef TEST3
cout << c.GetFoo() << endl;
#else
std::cout << c.GetFoo() << std::endl;
#endif
return 0;
}
/usr/bin/ld: cannot find -lgcc_s collect2: error: ld returned 1 exit status Test failed to compile Try: /usr/local/bin/g++ Line: /usr/local/bin/g++ -DTEST2 cmake_bootstrap_18998_test.cxx -o cmake_bootstrap_18998_test ---------- file -----------------------
/usr/bin/ld: 找不到 -lgcc_s collect2: 错误: ld 返回 1 退出状态 测试无法编译尝试：/usr/local/bin/g++ 行：/usr/local/bin/g++ -DTEST2 cmake_bootstrap_18998_test.cxx - o cmake_bootstrap_18998_test ---------- 文件 ---------------
The main problem is that the programmer who wrote the test did not include the include path -L/PATH/to/C++/header, that on my computer is /usr/local/include/c++/5.3.0
主要问题是写测试的程序员没有包含包含路径-L/PATH/to/C++/header，在我的电脑上是/usr/local/include/c++/5.3.0
This path should be included in the auto probing or should be an option in the configure program. I hope the cmake developers can see this message and change the auto detect a little bit.
这个路径应该包含在自动探测中或者应该是配置程序中的一个选项。我希望 cmake 开发人员可以看到此消息并稍微更改自动检测。
Or I may be wrong.
或者我可能错了。
