How to set C++ environment variable in Linux ubuntu? - c++

Question

I just installed Ubuntu on my Virtualbox on Windows.
I was trying to install cmake and the installation guide in the cmake website asked me to do the following steps
./bootstrap
make
make install
But when I just did the ./bootstrap command 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.
Kindly help.
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

Answer 1

Install the build-essential packages via apt.
sudo apt-get install build-essential

Answer 2

I am having the same problem. Even I defined the CXX environmental variable correctly.
$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.
I looked at the log file of the ./configure output:
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 -----------------------
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
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.
Or I may be wrong.