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bug#47382: runtest doesn't work with Solaris 10 /bin/sh

From: Jacob Bachmeyer
Subject: bug#47382: runtest doesn't work with Solaris 10 /bin/sh
Date: Thu, 25 Mar 2021 23:46:47 -0500
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20090807 MultiZilla/ SeaMonkey/1.1.17 Mnenhy/

Rainer Orth wrote:
When trying DejaGnu 1.6.3 rc1 on Solaris 10, it failed immediately with:

runtest: syntax error at line 43: `execpath=$' unexpected

The script hardcodes #!/bin/sh, but the Solaris 10 /bin/sh is
effectively the old Bourne Shell and doesn't support $().

There are several options, I believe:

* Substitute a shell that does (like /bin/ksh in the Solaris 10 case).

* Rework the script to avoid the construct.

* Give up in horror and declare Solaris 10 unsupported, preferably with
  a decent error message at configure time.

I had expected that some system out there might do this when I resisted pressure to more aggressively use newer shell constructs in the "dejagnu" multipurpose launcher script.

The previous maintainer had changed this because shellcheck complains about the old `backticks` form. I have chosen rework the script to return to `` instead of $() and `expr ...` instead of $((...)) before rc2.

As I am unable to test on Solaris, these reports are particularly helpful. A patch has been pushed to Savannah on the "dejagnu-1.6.3" branch and will be included in release candidate 2. While I would prefer if you could confirm that the patch fixes this bug prior to releasing rc2, I will understand if you do not have Git on your Solaris machine.

This issue should be fixed in commit e3b14d8555c5cabad03b9ccaa6aa1976ed590201 on the dejagnu-1.6.3 branch. After the 1.6.3 release, bugfixes on that branch will be forward-ported to master.

I plan to look at the other two bugs you reported tomorrow.

-- Jacob

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