bug#48155: [dejagnu-1.6.3-rc4] make check depends on SHELL

[Kiyoshi KANAZAWA]

Yes, error is produced.

$ make -k check
  :
EXPECT=expect; export EXPECT; \
if /bin/sh -c "./runtest --version" > /dev/null 2>&1; then \
  exit_status=0; l='launcher libdejagnu report-card runtest'; for tool in $l; 
do \
    if ./runtest  --tool $tool --srcdir $srcdir ; \
    then :; else exit_status=1; fi; \
  done; \
else echo "WARNING: could not find './runtest'" 1>&2; :;\
fi; \
exit $exit_status
ERROR: Running config.guess with SHELL=/usr/bin/csh exited on code 1.
ERROR: Running config.guess produced bogus build triplet:
        timestamp=2021-01-25: Command not found
Variable syntax
       (Perhaps you need to set CONFIG_SHELL or SHELL in your environment
        to the absolute file name of a POSIX shell?)
ERROR: Running config.guess with SHELL=/usr/bin/csh exited on code 1.
ERROR: Running config.guess produced bogus build triplet:
        timestamp=2021-01-25: Command not found
Variable syntax
       (Perhaps you need to set CONFIG_SHELL or SHELL in your environment
        to the absolute file name of a POSIX shell?)
ERROR: Running config.guess with SHELL=/usr/bin/csh exited on code 1.
ERROR: Running config.guess produced bogus build triplet:
        timestamp=2021-01-25: Command not found
Variable syntax
       (Perhaps you need to set CONFIG_SHELL or SHELL in your environment
        to the absolute file name of a POSIX shell?)
ERROR: Running config.guess with SHELL=/usr/bin/csh exited on code 1.
ERROR: Running config.guess produced bogus build triplet:
        timestamp=2021-01-25: Command not found
Variable syntax
       (Perhaps you need to set CONFIG_SHELL or SHELL in your environment
        to the absolute file name of a POSIX shell?)
make[1]: *** [Makefile:1084: check-DEJAGNU] Error 1
make[1]: Leaving directory '/tmp/dejagnu-1.6.3-rc4'
make: *** [Makefile:1294: check-am] Error 2
make: Target 'check' not remade because of errors.