Set a different C compiler

Set a different C compiler

[paul zhang]

Hi there,

I tried to build a HelloWorld project using the " cmake CMakeList.txt "
way. In the  CMakeList.txt file, I want to use the specific c and cxx
compilers

set(CMAKE_LEGACY_CYGWIN_WIN32 0)

#cmake_minimum_required(VERSION 2.6)

project(HelloWorld)

set (CMAKE_C_COMPILER icl)

set (CMAKE_CXX_COMPILER
/cygdrive/c/PROGRA~2/Intel/MPI/501~1.037/intel64/bin/mpicc)

set (CMAKE_CXX_FLAGS "-O3")

But the default c compiler is called instead, see below:

$ cmake CMakeLists.txt

-- The C compiler identification is MSVC 18.0.21005.1

-- The CXX compiler identification is MSVC 18.0.21005.1

-- Check for working C compiler: /cygdrive/c/Program Files (x86)/Microsoft
Visual Studio 12.0/VC/BIN/amd64/cl.exe

-- Check for working C compiler: /cygdrive/c/Program Files (x86)/Microsoft
Visual Studio 12.0/VC/BIN/amd64/cl.exe -- broken

CMake Error at /usr/share/cmake-3.14.5/Modules/CMakeTestCCompiler.cmake:60
(message):

  The C compiler


How to deal with this issue?


Thanks,
Paul

Re: Set a different C compiler

[Brian Inglis]

On 2020-07-28 08:03, paul zhang via Cygwin wrote:
> I tried to build a HelloWorld project using the " cmake CMakeList.txt " way.
> In the  CMakeList.txt file, I want to use the specific c and cxx compilers
> set(CMAKE_LEGACY_CYGWIN_WIN32 0)
> #cmake_minimum_required(VERSION 2.6)
> project(HelloWorld)
> set (CMAKE_C_COMPILER icl)
> set (CMAKE_CXX_COMPILER /cygdrive/c/PROGRA~2/Intel/MPI/501~1.037/intel64/bin/mpicc)
> set (CMAKE_CXX_FLAGS "-O3")
> But the default c compiler is called instead, see below:
> $ cmake CMakeLists.txt
> -- The C compiler identification is MSVC 18.0.21005.1
> -- The CXX compiler identification is MSVC 18.0.21005.1
> -- Check for working C compiler: /cygdrive/c/Program Files (x86)/Microsoft
> Visual Studio 12.0/VC/BIN/amd64/cl.exe
> -- Check for working C compiler: /cygdrive/c/Program Files (x86)/Microsoft
> Visual Studio 12.0/VC/BIN/amd64/cl.exe -- broken
> CMake Error at /usr/share/cmake-3.14.5/Modules/CMakeTestCCompiler.cmake:60
> (message):
>   The C compiler
> How to deal with this issue?

If using Intel's Windows toolchain, please follow Intel's documentation and
instructions for doing so.
Mixing these with Cygwin toolchain is unlikely to work well if at all.
You probably have issues with how the path is set up above.

-- 
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada

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