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shell-csh.mk revision 1.4 
      1 # $NetBSD: shell-csh.mk,v 1.4 2020/10/03 15:38:13 rillig Exp $
      2 #
      3 # Tests for using a C shell for running the commands.
      4 
      5 # The shell path must be an absolute path.
      6 # This is only obvious in parallel mode since in compat mode,
      7 # simple commands are executed via execve directly.
      8 .SHELL: name="csh" path="${:!which csh!}"
      9 
     10 # In parallel mode, the commandShell->noPrint command is filtered from
     11 # the output, rather naively (in JobOutput).
     12 #
     13 # Until 2020-10-03, the output in parallel mode was garbled because
     14 # the definition of the csh had been wrong since 1993 at least.
     15 .MAKEFLAGS: -j1
     16 
     17 all:
     18 	# This command is both printed and executed.
     19 	echo normal
     20 
     21 	# This command is only executed.
     22 	@echo hidden
     23 
     24 	# This command is both printed and executed.
     25 	+echo always
     26 
     27 	# This command is both printed and executed.
     28 	-echo ignore errors
     29 
     30 	# In the C shell, "unset verbose" is set as the noPrint command.
     31 	# Therefore it is filtered from the output, rather naively.
     32 	@echo 'They chatted in the sunset verbosely.'
     33