Date: Thu, 2 Mar 2017 14:02:13 +0300 From: Mingo Rrubioer <mingorrubioer@gmail.com> To: freebsd-current@freebsd.org Subject: CFLAGS for certain ports Message-ID: <CAB%2BN1g3ZFvkKqye45wYQg=JovByFb=wuOXzFvf9nuk2z6SwckQ@mail.gmail.com>
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Hello, New to FreeBSD and first post. If I got the wrong mailing list, just let me know where to ask my questions. I would like to see how well FreeBSD does as a workstation OS in the HPC world due to its stability and reliability, as well as LLVM/clang. I would like to know if FreeBSD has something similar to Gentoo's /etc/portage/make.conf file and /etc/portage/package.use/* files in order to compile certain ports with certain compiler flags. Currently I mainly use CFLAGS="-O2 -pipe -mtune=native" for most of the applications, so nothing really aggressive (in general). I've been reading through some FreeBSD docs (Handbook and ports documentation) but haven't found the answer (maybe looking in the wrong place). Regarding LLVM/clang, I've been reading the documentation and found these flags: -arch=<whatever>, -march=<whatever>, -mcpu=<whatever>, --target=<whatever>, target-cpu <whatever>. I'm not quite sure which one would be the one to use. In case someone wants to know, my initial play/test machine has this processor: CPU: Intel(R) Core(TM) i7-3820 CPU @ 3.60GHz (3600.11-MHz K8-class CPU) Origin="GenuineIntel" Id=0x206d7 Family=0x6 Model=0x2d Stepping=7 And I'm currently running: 11.0-RELEASE-p8. So I imagine I should use something like CFLAGS+= -march=corei7-avx -march=sandybridge -target-cpu. Is that correct? Currently all our deployed workstations are Intel with NVIDIA Quadro graphics cards. My target is not to migrate everything, I just want to know if FreeBSD would be suitable and where. As I mentioned, this would be for specific scientific applications, not system wide. Thanks !!
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