On Oct 13, 2009, at 5:09 PM, Dr. David Kirkby wrote: > The script prereq-0.3 script William wrote some time back checks the > build environment is sane. I've updated this code to prereq-0.4 > > http://sagetrac.org/sage_trac/ticket/7021 > > but there is an issue which I did not address, which I think needs > addressing. But I'm not sure the best way to do it. > > Both Williams code and my code will exit if gcc or g++ can't be found. > > If one tries to build Sage with a compiler such as Sun Studio, one can > now try (before the script would exit) - now only a warning is issued. > > > However, currently one still needs to have gcc and g++ in the path, > otherwise the script will exit. As the code stands, an attempt to > build > with a non-GNU compiler, without having both gcc and g++ in the path > will cause an error message and the script to exit. > > This seems a bit silly if you actually want to build with a non-GNU > compiler. It is advantageous to not have gcc and g++ in the path > sometimes, as its then very easy to find packages which always use > gcc, > and ignore the environment variable CC. > > I can see several ways around this. > > 1) Exit if either ar, ld, make, perl, ranlib or tar can not be found, > but only issue a warning if gcc or g++ can't be found. > > 2) Exit if gcc or g++ can not be found unless some new environment > variable (e.g. WITHOUT_GNU_COMPILERS) is exported to some non-empty > value. > > 3) Exit if gcc or g++ can not be found unless SAGE_PORT is exported to > some non-empty value. Currently SAGE_PORT is only needed on some > operating systems, and has nothing to do with compilers, but we could > extend it's usage to mean any unsupported operating systems or > unsupported compiler. > > My own belief is that (3) is the best, but I'd be interested what > others > think. There may be another option I've not thought of.
+1 to option (3). - Robert --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
