#7095: os x 10.6 port -- numerous mysterious errors caused by weird "abort trap"
issue
------------------------+---------------------------------------------------
Reporter: was | Owner: tbd
Type: defect | Status: new
Priority: critical | Milestone: sage-4.3.1
Component: porting | Keywords:
Work_issues: | Author:
Upstream: N/A | Reviewer:
Merged: |
------------------------+---------------------------------------------------
Comment(by drkirkby):
-a and -o are not GNUisms - they existed well before Linux and GNU.
But according to POSIX standards, they are depreciated. From some comments
I've seen on comp.unix.shell, there are a lot more 'gotchas' if you use
them, which I guess is the reason they are not preferred.
The POSIX 2008 standard
http://www.opengroup.org/onlinepubs/9699919799/utilities/test.html
says ''The XSI extensions specifying the -a and -o binary primaries and
the '(' and ')' operators have been marked obsolescent. ''
The earlier 2004 standard mentions the problems with -a and -o, but did
not consider them obsolete then. It also has some example of how brackets
should be placed around multiple tests, which are relevant to the above
example.
http://www.opengroup.org/onlinepubs/009695399/utilities/test.html
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7095#comment:30>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en.
