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varname-make_print_var_on_error-jobs.mk revision 1.2 
      1 # $NetBSD: varname-make_print_var_on_error-jobs.mk,v 1.2 2020/12/13 19:08:20 rillig Exp $
      2 #
      3 # Tests for the special MAKE_PRINT_VAR_ON_ERROR variable, which prints the
      4 # values of selected variables on error.
      5 #
      6 # The variable .ERROR_CMD contains all commands of the target, with variable
      7 # expressions expanded, just as they were printed to the shell command file.
      8 #
      9 # The commands in .ERROR_CMD are space-separated.  Since each command usually
     10 # contains spaces as well, this value is only intended as a first hint to what
     11 # happened.  For more details, use the debug options -de, -dj, -dl, -dn, -dx.
     12 #
     13 # See also:
     14 #	compat-error.mk
     15 
     16 # XXX: As of 2020-12-13, PrintOnError calls Var_Subst with VAR_GLOBAL, which
     17 # does not expand the node-local variables like .TARGET.  This results in the
     18 # double '${.TARGET}' in the output.
     19 
     20 # As of 2020-10-23, .ERROR_CMD only works in parallel mode.
     21 .MAKEFLAGS: -j1
     22 
     23 MAKE_PRINT_VAR_ON_ERROR=	.ERROR_TARGET .ERROR_CMD
     24 
     25 all:
     26 	@: before '${.TARGET}' '$${.TARGET}' '$$$${.TARGET}'
     27 	echo fail ${.TARGET}; false '${.TARGET}' '$${.TARGET}' '$$$${.TARGET}'
     28 	@: after '${.TARGET}' '$${.TARGET}' '$$$${.TARGET}'
     29