[Huwedwards]

Hi,

I am trying to install Openfoam-v2006 on my local machine which is running Centos8. I have been following the linked instructions (https://sourceexample.com/en/6fd29c0ca6c4680b69dd/) but when it comes to build GCC with the ./makeGcc command I get the following error:

make: *** [Makefile:886: all] Error 2
Error building: gcc-4.8.5

After much troubleshooting I haven't been able to find an explanation of what Error 2 refers to, or any others with the same issue. If anyone has experience with the same issue or could offer some guidance that would be much appreciated.

Thanks

[olesen]

Originally Posted by Huwedwards

Hi,

I am trying to install Openfoam-v2006 on my local machine which is running Centos8. I have been following the linked instructions (https://sourceexample.com/en/6fd29c0ca6c4680b69dd/) but when it comes to build GCC with the ./makeGcc command I get the following error:

make: *** [Makefile:886: all] Error 2
Error building: gcc-4.8.5

After much troubleshooting I haven't been able to find an explanation of what Error 2 refers to, or any others with the same issue. If anyone has experience with the same issue or could offer some guidance that would be much appreciated.

Thanks

If you have centos-8 I really don't know why you would want to bother building a much, much older compiler from scratch. Simply doesn't make sense to me. If you want to use older/new compilers, by far the easiest is to install them from your system. If you need to reference different system compilers, use the WM_COMPILE_CONTROL (see etc/bashrc for comments) to pick the version. My current compilation setup:

# etc/prefs.sh
export WM_COMPILER_TYPE=system
export WM_COMPILER=Clang140
export WM_COMPILE_CONTROL="version=14.0 +lld"

On my system this equates to "/usr/bin/clang-14.0"

[Huwedwards]

Thank you for your reply. I am attempting to use the third party packages from ThirdParty-v2006 which as far as I'm aware requires WM_COMPILER_TYPE=ThirdParty in etc/bashrc. Is it possible to build the third party packages (e.g scotch) using a system-installed compiler? If so, how would I go about doing so.

[olesen]

Originally Posted by Huwedwards

Thank you for your reply. I am attempting to use the third party packages from ThirdParty-v2006 which as far as I'm aware requires WM_COMPILER_TYPE=ThirdParty in etc/bashrc. Is it possible to build the third party packages (e.g scotch) using a system-installed compiler? If so, how would I go about doing so.

Using the system compiler for other ThirdParty components is completely standard.


The main (only?) reason for making your own ThirdParty gcc etc would be if you have a really, really old operating system with an old compiler (eg, gcc-4.4) that does not support c++11. The only other reason (what I have) is on new system but need to check if the OpenFOAM code is still acceptable for old compilers.

[Hughtong]

Originally Posted by olesen

Using the system compiler for other ThirdParty components is completely standard.


The main (only?) reason for making your own ThirdParty gcc etc would be if you have a really, really old operating system with an old compiler (eg, gcc-4.4) that does not support c++11. The only other reason (what I have) is on new system but need to check if the OpenFOAM code is still acceptable for old compilers.

There's another problem...If you got too high gcc version, up to gcc-11.*
When you using this compiler to compile OpenFOAM-2.3.x, got error:

warning: ISO C++17 does not allow ‘register’ storage class specifier [-Wregister]
335 | register label i = min(this->size_, newSize);

Will this effect the compile process?