CGAL 5 requires std=c++14
In order to compile v2012 against my install of CGAL 5 (ArchLinux, GCC v11.1) I had to bump the C++ standard to c++14 in wmake/rules/General/Gcc/c++ as c++11 is not sufficient to handle CGAL 5. I did not try more recent standards.
Activity
assigned to @mark
Hi @dariop
This is indeed a known limitation with current setup. We have still stuck with c++11 due to gcc-4.8.5, which is what older production systems (ie, CentOS 7) have. Can bump this
No fundamental problem with switching to c++14, but this bumps the minimum system requirements. So a bit of a trade-off again. Nonetheless, something that I want to address.
Edited by Mark OLESENHi Mark,
Thank you for your attention.
IMHO if someone is stuck with such a old compiler, they may as well stick to a previous release of openfoam, but I understand your position.
It is anyway a pretty easy fix to make on the fly before compiling for anyone with minimal experience.
Feel free to close the issue (or keep it open as a reminder).
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IMHO if someone is stuck with such a old compiler, they may as well stick to a previous release of openfoam, but I understand your position.
In an ideal world this would be the case, and certainly for an individual user. The problem is with various ages of clusters and installations at data centres, which are reinstalled/updated less frequently. One of my associates has the personal pain of testing/running OpenFOAM on systems that come with a gcc-4.4 as the system compiler. Then have to work your way up to compile a new ThirdParty gcc version in order to compile OpenFOAM and a newer clang version (for the mesa LLVM pipeline). Quite annoying for him.
mentioned in commit c2697f46
added community label
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Hi @dariop - I am closing out this issue for now. I have updated all of the compiler flags for non-gcc, but will need to leave with c++11 for gcc until our lowest common element (currently CentOS 7) catches up. Otherwise we have many, many problems with compilation.
