1*4fde40d9SSimon J. Gerraty# $NetBSD: sh-leading-hyphen.mk,v 1.4 2023/01/19 19:55:27 rillig Exp $ 22c3632d1SSimon J. Gerraty# 32c3632d1SSimon J. Gerraty# Tests for shell commands preceded by a '-', to ignore the exit status of 42c3632d1SSimon J. Gerraty# the command line. 5e2eeea75SSimon J. Gerraty# 6e2eeea75SSimon J. Gerraty# See also: 7e2eeea75SSimon J. Gerraty# .IGNORE 8e2eeea75SSimon J. Gerraty# depsrc-ignore.mk 9e2eeea75SSimon J. Gerraty# opt-ignore.mk 102c3632d1SSimon J. Gerraty 112c3632d1SSimon J. Gerraty# TODO: Implementation 122c3632d1SSimon J. Gerraty 132c3632d1SSimon J. Gerratyall: 14*4fde40d9SSimon J. Gerraty -true 15*4fde40d9SSimon J. Gerraty -false 16*4fde40d9SSimon J. Gerraty 17*4fde40d9SSimon J. Gerraty # An undefined variable expands to an empty string, without warning. 18*4fde40d9SSimon J. Gerraty # This is used in practice for prefixing tool names or for DESTDIR. 19*4fde40d9SSimon J. Gerraty # The '-' before 'unknown' is interpreted by make as '.IGNORE' flag. 20*4fde40d9SSimon J. Gerraty ${UNDEF}-unknown-command 'needed for needshell in compat.c' 21*4fde40d9SSimon J. Gerraty 22*4fde40d9SSimon J. Gerraty # Expanding undefined variables may lead to strange error messages 23*4fde40d9SSimon J. Gerraty # when the shell interprets single-character options as commands 24*4fde40d9SSimon J. Gerraty # instead. 25*4fde40d9SSimon J. Gerraty ${UNDEF} --unknown-long-option 'needed for needshell in compat.c' 26*4fde40d9SSimon J. Gerraty 27*4fde40d9SSimon J. Gerraty # Since 2023-01-17, the leading '@', '+' and '-' may contain 28*4fde40d9SSimon J. Gerraty # whitespace, for compatibility with GNU make. 29*4fde40d9SSimon J. Gerraty - - - @echo 'whitespace in leading part' 30