| # SPDX-License-Identifier: GPL-2.0 |
| |
| # Shorthand |
| warning = $(warning-if,y,$(1)) |
| |
| # You can not pass commas directly to a function since they are treated as |
| # delimiters. You can use the following trick to do so. |
| comma := , |
| $(warning,hello$(comma) world) |
| |
| # Like Make, single quotes, double quotes, spaces are treated verbatim. |
| # The following prints the text as-is. |
| $(warning, ' " '" ' ''' "'") |
| |
| # Unlike Make, '$' has special meaning only when it is followed by '('. |
| # No need to escape '$' itself. |
| $(warning,$) |
| $(warning,$$) |
| $ := 1 |
| $(warning,$($)) |
| |
| # You need a trick to escape '$' followed by '(' |
| # The following should print "$(X)". It should not be expanded further. |
| dollar := $ |
| $(warning,$(dollar)(X)) |
| |
| # You need a trick to treat unbalanced parentheses. |
| # The following should print "(". |
| left_paren := ( |
| $(warning,$(left_paren)) |
| |
| # A simple expanded should not be expanded multiple times. |
| # The following should print "$(X)". It should not be expanded further. |
| Y := $(dollar)(X) |
| $(warning,$(Y)) |
| |
| # The following should print "$(X)" as well. |
| Y = $(dollar)(X) |
| $(warning,$(Y)) |
| |
| # The following should print "$(". |
| # It should not be emit "unterminated reference" error. |
| unterminated := $(dollar)( |
| $(warning,$(unterminated)) |
