Thought I'd share this in case anyone else blundered in the same way I just did...
I installed 6.8 on an OS X Mavericks (10.9) system on which the "xcode-select --install" command had not been run. I ran "sage -upgrade" to upgrade it. I then tried to install a custom spkg, which failed in the configure step. To fix it, I tried running xcode-select --install, which had no effect. Turns out, this was because the Sage environment sets CPATH to an internal "include" directory, which when I looked at it, contained a "sys" subdirectory with an empty "cdefs.h" file in it. Not sure how it got there, but I'm guessing it's a result of doing the upgrade without having first run xcode-select. Once I deleted the "sys" subdirectory from the Sage internal "include" directory, I was able to install. Bill -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.