162306a36Sopenharmony_ci# SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci 362306a36Sopenharmony_ci# 'info' prints the argument to stdout. 462306a36Sopenharmony_ci$(info,hello world 0) 562306a36Sopenharmony_ci 662306a36Sopenharmony_ci# 'warning-if', if the first argument is y, sends the second argument to stderr, 762306a36Sopenharmony_ci# and the message is prefixed with the current file name and line number. 862306a36Sopenharmony_ci$(warning-if,y,hello world 1) 962306a36Sopenharmony_ci 1062306a36Sopenharmony_ci# 'error-if' is similar, but it terminates the parsing immediately. 1162306a36Sopenharmony_ci# The following is just no-op since the first argument is not y. 1262306a36Sopenharmony_ci$(error-if,n,this should not be printed) 1362306a36Sopenharmony_ci 1462306a36Sopenharmony_ci# Shorthand 1562306a36Sopenharmony_ciwarning = $(warning-if,y,$(1)) 1662306a36Sopenharmony_ci 1762306a36Sopenharmony_ci# 'shell' executes a command, and returns its stdout. 1862306a36Sopenharmony_ci$(warning,$(shell,echo hello world 3)) 1962306a36Sopenharmony_ci 2062306a36Sopenharmony_ci# Every newline in the output is replaced with a space, 2162306a36Sopenharmony_ci# but any trailing newlines are deleted. 2262306a36Sopenharmony_ci$(warning,$(shell,printf 'hello\nworld\n\n4\n\n\n')) 2362306a36Sopenharmony_ci 2462306a36Sopenharmony_ci# 'filename' is expanded to the currently parsed file name, 2562306a36Sopenharmony_ci# 'lineno' to the line number. 2662306a36Sopenharmony_ci$(warning,filename=$(filename)) 2762306a36Sopenharmony_ci$(warning,lineno=$(lineno)) 28