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Subject: Re: [OMPI devel] [OMPI svn] svn:open-mpi r27601 - trunk
From: Paul Hargrove (phhargrove_at_[hidden])
Date: 2012-11-14 20:41:23


On Wed, Nov 14, 2012 at 6:26 PM, Larry Baker <baker_at_[hidden]> wrote:

> m4 --version | sed -n -E -e
> '1s/^.*[^A-Za-z0-9_-]?([0-9]+[.][0-9]+[.][0-9]+)[^A-Za-z0-9_-]?.*$/\1/p'
>

There are STILL problems with this approach as it is TWICE specific to GNU
software:

1) M4 on OpenBSD (maybe others) doesn't support a "--version" flag:
$ m4 --version | sed -n -E -e
'1s/^.*[^A-Za-z0-9_-]?([0-9]+[.][0-9]+[.][0-9]+)[^A-Za-z0-9_-]?.*$/\1/p'
m4: unknown option -- -
usage: m4 [-gPs] [-Dname[=value]] [-d flags] [-I dirname] [-o filename]
        [-t macro] [-Uname] [file ...]

2) sed on Solaris (maybe others) doesn't support a "-E" flag:
$ m4 --version | sed -n -E -e
'1s/^.*[^A-Za-z0-9_-]?([0-9]+[.][0-9]+[.][0-9]+)[^A-Za-z0-9_-]?.*$/\1/p'
/bin/sed: illegal option -- E

-Paul

-- 
Paul H. Hargrove                          PHHargrove_at_[hidden]
Future Technologies Group
Computer and Data Sciences Department     Tel: +1-510-495-2352
Lawrence Berkeley National Laboratory     Fax: +1-510-486-6900