[bug #56449] job.c (construct_command_argv_internal): Must use shell if '%' character is present in recipe line

[Eli Zaretskii]

Follow-up Comment #6, bug #56449 (project make):

But the result is wrong when %..% doesn't specify a known variable, most
probably because we invoke the command through a batch file.

Try this from cmd.exe prompt:

 > echo %foo%

You will see %foo%.

Now try with make:

  D:\usr\eli>\gnu\make-4.2.90-guile\GccRel\gnumake -f-
  SHELL=cmd.exe

  all:
          @echo %foo%
  ^Z
  ECHO is off.

In other words, 'echo' was invoked with an empty string, which is not what we
want.


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