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Subject: Re: [OMPI devel] [OMPI svn] svn:open-mpi r27601 - trunk
From: Larry Baker (baker_at_[hidden])
Date: 2012-11-14 21:10:15


Paul,

1) I wasn't trying to solve the --version issue, only the parsing of the response.
2) I assumed from the initial e-mail that the broken parser was in a Perl script. I'm not a Perl person, so I wrote the example regular expression parser in sed.

These commands were done on my Mac OS X 10.6 system. I have no idea where the apps came from. I know the sed, at least, does not recognize regular expressions documented for GNU sed (such as \< \> for begin/end word). Maybe it is a BSD sed?

I was just trying to illustrate how to fix the broken parsing of Ralph's "flex --version". Assuming the RE parser I wrote is satisfactory, it would have to be adapted to fit in the framework, i.e., it has to be portable.

Larry Baker
US Geological Survey
650-329-5608
baker_at_[hidden]

On 14 Nov 2012, at 5:41 PM, Paul Hargrove wrote:

> 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
>
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