Re: Compiling FreeBSD with GCC 4.3+
Hi David, On Monday 20 April 2009 21:48:39 David Naylor wrote: There has been an article recently published by phoronix (http://www.phoronix.com/scan.php?page=articleitem=pcbsd_vs_kubuntunum=1) that compares PC-BSD to Kubuntu. Kubuntu uses GCC 4.3.3 compared to FreeBSD's GCC 4.2.2. There is a considerable performance difference between the two OS's, the article contributes this difference to the compiler. Nice shot in the dark, since except the calculations a lot of these are influenced by journaled FS vs stock UFS. In order to check if this is so (and to get the speed improvements of GCC 4.3+) one needs to compile the ports (and preferable world/kernel as well) with GCC 4.3+. It's license is incompatible with world/kernel. That said, install lang/gcc43 and set CC/CXX for ports. World/kernel would be a lot harder. Maybe setting WITHOUT_GCC in /etc/src.conf and setting CC/CXX would work, but there's quite a few modifications to gcc that aren't in ports lang/gcc, so I have my doubts. Is there an easy way to set this up and does anyone know the compatibility of world/kernel/ports with GCC 4.3+? Also has anyone tried this and benchmarked the result? Not me, but be sure to stick around for the new non-gcc compiler coming to a FreeBSD near you. And with the work done by Marcel Molenaar on gpart, hopefully we can have ZFS and gjournal as choices in the installer. -- Mel ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Compiling FreeBSD with GCC 4.3+
On Tuesday 21 April 2009 10:32:04 Mel Flynn wrote: Hi David, On Monday 20 April 2009 21:48:39 David Naylor wrote: There has been an article recently published by phoronix (http://www.phoronix.com/scan.php?page=articleitem=pcbsd_vs_kubuntunum= 1) that compares PC-BSD to Kubuntu. Kubuntu uses GCC 4.3.3 compared to FreeBSD's GCC 4.2.2. There is a considerable performance difference between the two OS's, the article contributes this difference to the compiler. Nice shot in the dark, since except the calculations a lot of these are influenced by journaled FS vs stock UFS. I know, benchmarking anything but the simplest things are influenced by too many factors. Pity it doesn't provide an unbiased comparison of FreeBSD and Linux. In order to check if this is so (and to get the speed improvements of GCC 4.3+) one needs to compile the ports (and preferable world/kernel as well) with GCC 4.3+. It's license is incompatible with world/kernel. What type of incompatibility. I know FreeBSD has reservations about GPLv3 (I personally don't understand why everyone cannot be friends and use BSD Licenses). So is this a policy incompatibility or a legal one (i.e. would it be 'illegal' for me to use GCC 4.3+ to compile world/kernel, as an end-user/consumer of FreeBSD). I assume the same discussion applies to binutils. That said, install lang/gcc43 and set CC/CXX for ports. World/kernel would be a lot harder. Maybe setting WITHOUT_GCC in /etc/src.conf and setting CC/CXX would work, but there's quite a few modifications to gcc that aren't in ports lang/gcc, so I have my doubts. I suppose it would be nice if there was an easy way to use an out-of-source compiler in FreeBSD. Like set PORTS_COMPILER=gcc43 and the port will installed and used... One may have dreams. Is there an easy way to set this up and does anyone know the compatibility of world/kernel/ports with GCC 4.3+? Also has anyone tried this and benchmarked the result? Not me, but be sure to stick around for the new non-gcc compiler coming to a FreeBSD near you. And with the work done by Marcel Molenaar on gpart, hopefully we can have ZFS and gjournal as choices in the installer. You mean llvm, waiting patiently. I suppose my suggestion above will become even more important (at least for compiling ports) since it will be a while till llvm has decent c++ support. Thanks for your reply signature.asc Description: This is a digitally signed message part.
Re: Compiling FreeBSD with GCC 4.3+
On Tuesday 21 April 2009 17:37:50 David Naylor wrote: On Tuesday 21 April 2009 10:32:04 Mel Flynn wrote: Hi David, On Monday 20 April 2009 21:48:39 David Naylor wrote: There has been an article recently published by phoronix (http://www.phoronix.com/scan.php?page=articleitem=pcbsd_vs_kubuntunu m= 1) that compares PC-BSD to Kubuntu. Kubuntu uses GCC 4.3.3 compared to FreeBSD's GCC 4.2.2. There is a considerable performance difference between the two OS's, the article contributes this difference to the compiler. Nice shot in the dark, since except the calculations a lot of these are influenced by journaled FS vs stock UFS. I know, benchmarking anything but the simplest things are influenced by too many factors. Pity it doesn't provide an unbiased comparison of FreeBSD and Linux. That and comparing apples and pears as default configured fruit, don't usually work well. Of course it appeals to the end user which fruit is healthier. In order to check if this is so (and to get the speed improvements of GCC 4.3+) one needs to compile the ports (and preferable world/kernel as well) with GCC 4.3+. It's license is incompatible with world/kernel. What type of incompatibility. I know FreeBSD has reservations about GPLv3 (I personally don't understand why everyone cannot be friends and use BSD Licenses). So is this a policy incompatibility or a legal one (i.e. would it be 'illegal' for me to use GCC 4.3+ to compile world/kernel, as an end-user/consumer of FreeBSD). I assume the same discussion applies to binutils. Policy. Only legal issue in FreeBSD for the end user is WITH_IDEA. That said, install lang/gcc43 and set CC/CXX for ports. World/kernel would be a lot harder. Maybe setting WITHOUT_GCC in /etc/src.conf and setting CC/CXX would work, but there's quite a few modifications to gcc that aren't in ports lang/gcc, so I have my doubts. I suppose it would be nice if there was an easy way to use an out-of-source compiler in FreeBSD. Like set PORTS_COMPILER=gcc43 and the port will installed and used... One may have dreams. cat 'EOF' /etc/make.conf .if !empty(.CURDIR:M/usr/ports/*) CC=/usr/local/bin/gcc43 CXX=/usr/local/bin/g++43 .endif EOF Pretty close, huh? Is there an easy way to set this up and does anyone know the compatibility of world/kernel/ports with GCC 4.3+? Also has anyone tried this and benchmarked the result? Not me, but be sure to stick around for the new non-gcc compiler coming to a FreeBSD near you. And with the work done by Marcel Molenaar on gpart, hopefully we can have ZFS and gjournal as choices in the installer. You mean llvm, waiting patiently. I suppose my suggestion above will become even more important (at least for compiling ports) since it will be a while till llvm has decent c++ support. Yeah, I don't know how that's gonna work if llvm is ready for base, but no c++. I guess we'll have to sit out g++ 4.2 for a while. If you're in the position to do so, I'd do their benchmarks with ZFS and see how much difference that already makes. -- Mel ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: Compiling FreeBSD with GCC 4.3+
On Tuesday 21 April 2009 17:58:15 Mel Flynn wrote: On Tuesday 21 April 2009 17:37:50 David Naylor wrote: On Tuesday 21 April 2009 10:32:04 Mel Flynn wrote: Hi David, On Monday 20 April 2009 21:48:39 David Naylor wrote: There has been an article recently published by phoronix (http://www.phoronix.com/scan.php?page=articleitem=pcbsd_vs_kubuntu; nu m= 1) that compares PC-BSD to Kubuntu. Kubuntu uses GCC 4.3.3 compared to FreeBSD's GCC 4.2.2. There is a considerable performance difference between the two OS's, the article contributes this difference to the compiler. Nice shot in the dark, since except the calculations a lot of these are influenced by journaled FS vs stock UFS. I know, benchmarking anything but the simplest things are influenced by too many factors. Pity it doesn't provide an unbiased comparison of FreeBSD and Linux. That and comparing apples and pears as default configured fruit, don't usually work well. Of course it appeals to the end user which fruit is healthier. :-) In order to check if this is so (and to get the speed improvements of GCC 4.3+) one needs to compile the ports (and preferable world/kernel as well) with GCC 4.3+. It's license is incompatible with world/kernel. What type of incompatibility. I know FreeBSD has reservations about GPLv3 (I personally don't understand why everyone cannot be friends and use BSD Licenses). So is this a policy incompatibility or a legal one (i.e. would it be 'illegal' for me to use GCC 4.3+ to compile world/kernel, as an end-user/consumer of FreeBSD). I assume the same discussion applies to binutils. Policy. Only legal issue in FreeBSD for the end user is WITH_IDEA. Thanks for sorting that out. Good news for me. That said, install lang/gcc43 and set CC/CXX for ports. World/kernel would be a lot harder. Maybe setting WITHOUT_GCC in /etc/src.conf and setting CC/CXX would work, but there's quite a few modifications to gcc that aren't in ports lang/gcc, so I have my doubts. I suppose it would be nice if there was an easy way to use an out-of-source compiler in FreeBSD. Like set PORTS_COMPILER=gcc43 and the port will installed and used... One may have dreams. cat 'EOF' /etc/make.conf .if !empty(.CURDIR:M/usr/ports/*) CC=/usr/local/bin/gcc43 CXX=/usr/local/bin/g++43 .endif EOF Pretty close, huh? Kinda, it is what I was thinking about (or just symlinking cc, cxx to the proper programs). Of course if this is implemented 'properly' in ports then auto-dependencies and all that will be added. I was actually thinking about replacing the standard compiler by a) not installing gcc 4.2.2 (i think WITHOUT_GCC, as mentioned by yourself) b) installing latest gcc: # make -C /usr/ports/lang/gcc43 install DESTDIR=/new/freebsd/system PREFIX=/usr -DWITHOUT_JAVA [ With symlinks from gcc43 - gcc, etc] c) Hoping this works Well something like that (with extra hope) Is there an easy way to set this up and does anyone know the compatibility of world/kernel/ports with GCC 4.3+? Also has anyone tried this and benchmarked the result? Not me, but be sure to stick around for the new non-gcc compiler coming to a FreeBSD near you. And with the work done by Marcel Molenaar on gpart, hopefully we can have ZFS and gjournal as choices in the installer. You mean llvm, waiting patiently. I suppose my suggestion above will become even more important (at least for compiling ports) since it will be a while till llvm has decent c++ support. Yeah, I don't know how that's gonna work if llvm is ready for base, but no c++. I guess we'll have to sit out g++ 4.2 for a while. If you're in the position to do so, I'd do their benchmarks with ZFS and see how much difference that already makes. Well, llvm does support C++ (with the gcc frontend) so that shouldn't be too much of a problem. clang is more of the issue but I suppose we could always have llvm-clang for C and llvm-gcc for C++ (until clang gets full C++ support). signature.asc Description: This is a digitally signed message part.
Compiling FreeBSD with GCC 4.3+
Hi, There has been an article recently published by phoronix (http://www.phoronix.com/scan.php?page=articleitem=pcbsd_vs_kubuntunum=1) that compares PC-BSD to Kubuntu. Kubuntu uses GCC 4.3.3 compared to FreeBSD's GCC 4.2.2. There is a considerable performance difference between the two OS's, the article contributes this difference to the compiler. In order to check if this is so (and to get the speed improvements of GCC 4.3+) one needs to compile the ports (and preferable world/kernel as well) with GCC 4.3+. Is there an easy way to set this up and does anyone know the compatibility of world/kernel/ports with GCC 4.3+? Also has anyone tried this and benchmarked the result? Regards, David signature.asc Description: This is a digitally signed message part.
