1# $NetBSD: cmdline-undefined.mk,v 1.4 2023/11/19 21:47:52 rillig Exp $ 2# 3# Tests for undefined expressions in the command line. 4 5all: 6 # When the command line is parsed, variable assignments using the 7 # '=' assignment operator do get their variable name expanded 8 # (which probably occurs rarely in practice, if at all), but their 9 # variable value is not expanded, as usual. 10 # 11 @echo 'The = assignment operator' 12 @${.MAKE} -f ${MAKEFILE} print-undefined \ 13 CMDLINE='Undefined is $${UNDEFINED}.' 14 @echo 15 16 # The interesting case is using the ':=' assignment operator, which 17 # expands its right-hand side. But only those variables that are 18 # defined. 19 @echo 'The := assignment operator' 20 @${.MAKE} -f ${MAKEFILE} print-undefined \ 21 CMDLINE:='Undefined is $${UNDEFINED}.' 22 @echo 23 24.if make(print-undefined) 25 26.MAKEFLAGS: MAKEFLAGS_ASSIGN='Undefined is $${UNDEFINED}.' 27.MAKEFLAGS: MAKEFLAGS_SUBST:='Undefined is $${UNDEFINED}.' 28 29# expect+2: From the command line: Undefined is . 30# expect+1: From the command line: Undefined is . 31.info From the command line: ${CMDLINE} 32# expect+2: From .MAKEFLAGS '=': Undefined is . 33# expect+1: From .MAKEFLAGS '=': Undefined is . 34.info From .MAKEFLAGS '=': ${MAKEFLAGS_ASSIGN} 35# expect+2: From .MAKEFLAGS ':=': Undefined is . 36# expect+1: From .MAKEFLAGS ':=': Undefined is . 37.info From .MAKEFLAGS ':=': ${MAKEFLAGS_SUBST} 38 39UNDEFINED?= now defined 40 41# expect+2: From the command line: Undefined is now defined. 42# expect+1: From the command line: Undefined is now defined. 43.info From the command line: ${CMDLINE} 44# expect+2: From .MAKEFLAGS '=': Undefined is now defined. 45# expect+1: From .MAKEFLAGS '=': Undefined is now defined. 46.info From .MAKEFLAGS '=': ${MAKEFLAGS_ASSIGN} 47# expect+2: From .MAKEFLAGS ':=': Undefined is now defined. 48# expect+1: From .MAKEFLAGS ':=': Undefined is now defined. 49.info From .MAKEFLAGS ':=': ${MAKEFLAGS_SUBST} 50 51print-undefined: 52.endif 53