directive-ifmake.mk revision 1.6
1 # $NetBSD: directive-ifmake.mk,v 1.6 2020/11/08 22:45:51 rillig Exp $ 2 # 3 # Tests for the .ifmake directive, which provides a shortcut for asking 4 # whether a certain target is requested to be made from the command line. 5 6 # This is the most basic form. 7 .ifmake first 8 . info ok: positive condition works 9 .else 10 . warning positive condition fails 11 .endif 12 13 # The not operator works as expected. 14 # An alternative interpretation were that this condition is asking whether 15 # the target "!first" was requested. To distinguish this, see the next test. 16 .ifmake !first 17 . warning unexpected 18 .else 19 . info ok: negation works 20 .endif 21 22 # See if the exclamation mark really means "not", or if it is just part of 23 # the target name. 24 .ifmake !!first 25 . info ok: double negation works 26 .else 27 . warning double negation fails 28 .endif 29 30 # Multiple targets can be combined using the && and || operators. 31 .ifmake first && second 32 . info ok: both mentioned 33 .else 34 . warning && does not work as expected 35 .endif 36 37 # Negation also works in complex conditions. 38 .ifmake first && !unmentioned 39 . info ok: only those mentioned 40 .else 41 . warning && with ! does not work as expected 42 .endif 43 44 # Using the .MAKEFLAGS special dependency target, arbitrary command 45 # line options can be added at parse time. This means that it is 46 # possible to extend the targets to be made. 47 .MAKEFLAGS: late-target 48 .ifmake late-target 49 . info Targets can even be added at parse time. 50 .else 51 . info No, targets cannot be added at parse time anymore. 52 .endif 53 54 # Numbers are interpreted as numbers, no matter whether the directive is 55 # a plain .if or an .ifmake. 56 .ifmake 0 57 . error 58 .endif 59 .ifmake 1 60 .else 61 . error 62 .endif 63 64 first second unmentioned late-target: 65 : $@ 66
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