为什么Cmake总是选择GCC？ [英] Why does Cmake Always Choose GCC?

问题描述

由于我无法完全理解的原因，Cmake在编译软件时选择GNU编译器工具集。

For reasons that I cannot completely understand, Cmake awlays chooses the GNU compiler toolset when compiling software.

我的环境如下所示：

which cc
/opt/cray/xt-asyncpe/4.9/bin/cc
which CC
/opt/cray/xt-asyncpe/4.9/bin/CC
echo $CC
/opt/cray/xt-asyncpe/4.9/bin/cc
echo $CXX
/opt/cray/xt-asyncpe/4.9/bin/CC

但是当我使用cmake我得到这个

but when I use cmake I get this

Using existing /opt/cmake/2.8.4/bin/cmake
-- The C compiler identification is GNU
-- The CXX compiler identification is GNU
-- Check for working C compiler: /usr/bin/gcc
-- Check for working C compiler: /usr/bin/gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info

它使用g ++命令构建所有软件。为什么会这样？如何设置编译器？

And it builds all the software with g++ commands. Why is this going on? How does one set the compiler?

推荐答案

我不知道为什么CMake有利于GCC。

I'm not sure why CMake favours GCC.

但是，要设置编译器，请使用：

However, to set the compilers, use:

cmake <path to CMakeLists.txt> -DCMAKE_C_COMPILER=/opt/cray/xt-asyncpe/4.9/bin/cc -DCMAKE_CXX_COMPILER=/opt/cray/xt-asyncpe/4.9/bin/CC

这些值将被缓存，因此CMake的后续运行（如果需要）可以简单地被调用：

These values will be cached, so subsequent runs of CMake (if required) can simply be invoked by:

cmake .

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