William Stein wrote: > On Sat, Dec 26, 2009 at 4:52 AM, Dr. David Kirkby > <david.kir...@onetel.net> wrote: >> Is there anyone actively working on changing Sage's source so it builds with >> gcc >> 3.4.x? >> >> Is there any point in trying, given the 3.4 series is so old and newer >> releases >> of gcc are readily available on any platform? >> >> 'prereq' will exit for gcc older than 3.4.0 and also for the buggy 4.0.0, but >> for 3.4.x it will just issue a warning. >> >> I see 3 problems with this myself. >> >> 1) The warning flies past so quickly on a fast machine, you would have to be >> very eagle-eyed to see it. >> >> 2) I doubt anyone is trying to fix 3.4 series issues. >> >> 3) Solaris does ship with gcc 3.4.3, which means someone can start the build, >> even though it will ultimately fail. >> >> I'd propose I simply update prereq to simply exit for any gcc < 4.0.1. >> > > Exit, but with a message about setting a specific environment variable > that will allow the build to continue. > > We should *definitely, definitely* not shut the possibility of > supporting 3.4, just because nobody is currently fixing ratpoints. > > -- William
Fair enough. I changed it exits by default: checking if gcc accepts -dumpversion option... yes checking gcc version... 3.4.3 checking if g++ accepts -dumpversion option... yes checking g++ version... 3.4.3 configure: Good, gcc and g++ are the same version (3.4.3) configure: Later, it will be checked if GCC 3.4.3 is suitable configure: WARNING: ****************************************************** configure: WARNING: ****************************************************** configure: WARNING: ****************************************************** configure: WARNING: GCC 3.4.3 is too old and can not build Sage. configure: WARNING: Please use a gcc of at least 4.0.1 configure: WARNING: if you just want Sage to build without problems. configure: WARNING: configure: WARNING: If you want to try building Sage with a GCC 3.4.x configure: WARNING: with a view to debugging the problems which stop it configure: WARNING: working on a gcc 3.4 series compiler, set the configure: WARNING: environment variable SAGE_USE_OLD_GCC to something non configure: WARNING: empty. But if you just want Sage to work, upgrade GCC configure: WARNING: ****************************************************** configure: WARNING: ****************************************************** configure: error: Exiting due to the use of a version of GCC that is too old ERROR: You do not have all of the prerequisites needed But will allow the build to progress if SAGE_USE_OLD_GCC is exported. $ export SAGE_USE_OLD_GCC=foobar $ make checking for Perl version 5.6.0 or later... yes checking if gcc accepts -dumpversion option... yes checking gcc version... 3.4.3 checking if g++ accepts -dumpversion option... yes checking g++ version... 3.4.3 configure: Good, gcc and g++ are the same version (3.4.3) configure: Later, it will be checked if GCC 3.4.3 is suitable configure: WARNING: ****************************************************** configure: WARNING: ****************************************************** configure: WARNING: ****************************************************** configure: WARNING: GCC 3.4.3 is too old and can not build Sage. configure: WARNING: Please use a gcc of at least 4.0.1 configure: WARNING: if you just want Sage to build without problems. configure: WARNING: configure: WARNING: Since the variable SAGE_USE_OLD_GCC was set, the configure: WARNING: build will continue, but it will fail without changes configure: WARNING: to the Sage source code. You can be 100% sure of that. configure: creating ./config.status config.status: creating Makefile config.status: creating config.h config.status: config.h is unchanged config.status: executing depfiles commands base/bzip2-1.0.5-install 2>&1 Decompressing bzip2 bzip2-1.0.5/blocksort.c -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
