Avoid the use of Perl in configure

[Rhialto]

In configure.ac there are these lines:

dnl Kludge to fix Debian/Ubuntu libtool
perl -pi -e 's/link_all_deplibs=no/link_all_deplibs=yes/' libtool

As far as I can see, this is the only use of Perl in the actual building process. It would be nice to remove it, since it is a pretty expensive dependency.

The same effect can be had with (gnu)sed which is already a dependency. I haven't checked yet if any gnu specific features of gsed are used, and can be removed, but here I will avoid those:

sed -e 's/^link_all_deplibs=no$/link_all_deplibs=yes/' <libtool >libtool.new
mv libtool.new libtool

(adding the ^ and $ anchors while I'm there)

(There is some use of Perl in the git hooks, but those are only relevant when committing anything, so removing Perl for the build-only case is still worth it in my opinion)

[wrljet]

I will test this on all my build test systems.
Bill

[wrljet]

OK, I lied, I'm not going to test this on all my test systems, as there are just too many.
But I have tested this change on these:

• Arch Linux (updated to latest)
• Alma Linux 8.5
• Debian 10
• Fedora 34
• FreeBSD 12.2
• MacOS Big Sur 11.5
• MacOS Monterey 12.1

I think this is a decent representative sample of the different major distributions.
All of the above are x86_64 versions, but I seriously doubt the sed is affected by the CPU type.

So... I'm going to go ahead and commit this change shortly to the develop branch.

Bill

[wrljet]

Changed in commit dabbf19