dealii installation issues on Intel Mac

[Alexander Greiner]

Dear all,

after updating my Intel Mac to 

Sonoma 14.6.1

Xcode 15.4

xcode-select version 2408

AppleClang 15.0.0

I have problems reinstalling deal.II.

I tried the https://github.com/dealii/dealii/releases/download/v9.5.2/dealii-9.5.2-sonoma-intel.dmg package ending up in cmake errors (attached) and discussed also here (https://groups.google.com/g/dealii/c/2hQ_pqbejgM). I tried ccmake to set the correct compiler which leads to a successful run of cmake, but make then leads to linker errors.

I also painfully managed to install the current dealii master version directly via spack, essentially leading to the same cmake problems.

I also tried using candi (as it recently worked successfully on a Mac with M3 processor) - also without success.

I highly appreciate any tips, tricks and magic to install a recent version of deal.II.

Thank you! Best,

Alex 

[Luca Heltai]

The fix for this is quite simple, actually. You don’t have to recompile anything. It is enough to replace che path of the compiler inside the cmake file. 

Modify $(spack location -i dealii)/lib/share/cmake/deal.II/deal.IIConfig.cmake, around lines 109/110

    set(DEAL_II_CXX_COMPILER "/spack/lib/spack/env/gcc/g++")

    set(DEAL_II_C_COMPILER "/spack/lib/spack/env/gcc/gcc")

must become

    set(DEAL_II_CXX_COMPILER "/Applications/deal.II.app/Contents/Resources/Libraries/bin/mpicxx")

    set(DEAL_II_C_COMPILER "/Applications/deal.II.app/Contents/Resources/Libraries/bin/mpicc")

Luca

Il giorno 18 set 2024, alle ore 15:56, 'Alexander Greiner' via deal.II User Group <dea...@googlegroups.com> ha scritto:

Dear all,

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<cmake_error.rtf>

[Alexander Greiner]

Awesome! Thank you so much Luca!

Just for your information, in my case I had to replace 

set(DEAL_II_CXX_COMPILER "/Applications/deal.II.app/Contents/Resources/spack/lib/spack/env/clang/clang++")

set(DEAL_II_C_COMPILER "/Applications/deal.II.app/Contents/Resources/spack/lib/spack/env/clang/clang")

with exactly your suggestion, works flawlessly.

Best,

Alex