bug#44580: DejaGnu runtest not found of site.exp exists

I have a Makefile created using the auto tools and it has a problem when making the ‘check’ target. The problem is the make file fails to verify the existence of runtest. The command used to test for the existence of runtest is:

	if /bin/bash -c "runtest --version" > /dev/null 2>&1; then

What I found by running runtest by hand is it fails if the file site.ext exists. 

parallels@parallels-Parallels-Virtual-Platform:~/Desktop/Parallels Shared Folders/FlDist/trunk/testsuite$ runtest --version
ERROR: tcl error sourcing /media/psf/FlDist/trunk/testsuite/site.exp.
wrong # args: should be "set varName ?newValue?"
    while executing
"set objdir /home/parallels/Desktop/Parallels Shared Folders/FlDist/trunk/testsuite"
    (file "/media/psf/FlDist/trunk/testsuite/site.exp" line 5)
    invoked from within
"source /media/psf/FlDist/trunk/testsuite/site.exp"
    ("uplevel" body line 1)
    invoked from within
"uplevel #0 source /media/psf/FlDist/trunk/testsuite/site.exp"
    invoked from within
"catch "uplevel #0 source $file""
parallels@parallels-Parallels-Virtual-Platform:~/Desktop/Parallels Shared Folders/FlDist/trunk/testsuite$ rm site.exp
parallels@parallels-Parallels-Virtual-Platform:~/Desktop/Parallels Shared Folders/FlDist/trunk/testsuite$ runtest --version
DejaGnu version	1.6.2
Expect version	5.45.4
Tcl version	8.6
parallels@parallels-Parallels-Virtual-Platform:~/Desktop/Parallels Shared Folders/FlDist/trunk/testsuite$ uname -a
Linux parallels-Parallels-Virtual-Platform 5.4.0-42-generic #46-Ubuntu SMP Fri Jul 10 00:24:02 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
parallels@parallels-Parallels-Virtual-Platform:~/Desktop/Parallels Shared Folders/FlDist/trunk/testsuite$

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