Dear Alexander and Vinayak,
I also used spack for the installation and for me, something similar (the
same?) happend.
Running simply cmake . gives the following error.
*$ cmake .*
-- Check for working CXX compiler: /home/~/spack/lib/spack/env/gcc/g++ -
broken
CMake Error at
/usr/local/share/cmake-3.27/Modules/CMakeTestCXXCompiler.cmake:60 (message):
The C++ compiler
"/home/~/spack/lib/spack/env/gcc/g++"
is not able to compile a simple test program.
It fails with the following output:
What now works for me is running
*$ cmake -DCMAKE_CXX_COMPILER=g++ *
instead which I think is essentially what Prof. Bangerth was getting at
above by using the compiler that your system has.
I don't remember but I think I must have found out with the help of ChatGPT.
Before you try running cmake again, run * $ rm CMakeCache.txt*
such that you start from the beginning with cmake.
Hope that will work for you too.
Best,
Nik
On Tuesday, November 19, 2024 at 6:38:16 PM UTC-8 Wolfgang Bangerth wrote:
> On 11/19/24 05:17, Vinayak Vijay wrote:
> > -- Check for working CXX compiler:
> > /home/omnipresent/Documents/github_repos/spack/lib/spack/env/gcc/g++ -
> broken
> > CMake Error at
> >
> /home/omnipresent/Documents/github_repos/spack/opt/spack/linux-ubuntu24.04-icelake/gcc-13.2.0/cmake-3.30.5-74qenkgyifomlcmwslmffwjq3vbfs5km/share/cmake-3.30/Modules/CMakeTestCXXCompiler.cmake:73
>
> (message):
> > The C++ compiler
> >
> >
> "/home/omnipresent/Documents/github_repos/spack/lib/spack/env/gcc/g++"
> >
> > is not able to compile a simple test program.
> >
> > It fails with the following output:
> >
> > Change Dir:
> >
> '/home/omnipresent/Documents/github_repos/dealii/examples/step-2/build/CMakeFiles/CMakeScratch/TryCompile-aLSS2O'
> >
> > Run Build Command(s):
> >
> /home/omnipresent/Documents/github_repos/spack/opt/spack/linux-ubuntu24.04-icelake/gcc-13.2.0/cmake-3.30.5-74qenkgyifomlcmwslmffwjq3vbfs5km/bin/cmake
>
> -E env VERBOSE=1
> /home/omnipresent/Documents/github_repos/spack/var/spack/environments/dealii_9_6/.spack-env/view/bin/gmake
>
> -f Makefile cmTC_14ee5/fast
> >
> /home/omnipresent/Documents/github_repos/spack/var/spack/environments/dealii_9_6/.spack-env/view/bin/gmake
>
> -f CMakeFiles/cmTC_14ee5.dir/build.make CMakeFiles/cmTC_14ee5.dir/build
> > gmake[1]: Entering directory
> >
> '/home/omnipresent/Documents/github_repos/dealii/examples/step-2/build/CMakeFiles/CMakeScratch/TryCompile-aLSS2O'
> > Building CXX object CMakeFiles/cmTC_14ee5.dir/testCXXCompiler.cxx.o
> > /home/omnipresent/Documents/github_repos/spack/lib/spack/env/gcc/g++
> > -o CMakeFiles/cmTC_14ee5.dir/testCXXCompiler.cxx.o -c
> >
> /home/omnipresent/Documents/github_repos/dealii/examples/step-2/build/CMakeFiles/CMakeScratch/TryCompile-aLSS2O/testCXXCompiler.cxx
> > [spack cc] ERROR: Spack compiler must be run from Spack! Input
> > 'SPACK_ENV_PATH' is missing.
>
> Vijay:
> the way I read this error is that you asked Spack to download and install
> its
> own compiler, and that it now insists that you keep using that going
> forward:
> ERROR: Spack compiler must be run from Spack! Input 'SPACK_ENV_PATH' is
> missing.
>
> I really don't know anything about Spack (perhaps others here do), but my
> suggestion is to always rely on the compiler your system has. I see no
> reason
> not to use the compiler that comes with Ubuntu 24.04.
>
> Best
> W.
>
> --
> ------------------------------------------------------------------------
> Wolfgang Bangerth email: [email protected]
> www: http://www.math.colostate.edu/~bangerth/
>
>
>
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