Re: A function to print instead of $(warning ) or $(error )

[Pete Johnson]

On Feb 23, 2005, at 8:03 AM, John Graham-Cumming wrote:

> This works for me in GNU Make 3.80:
>
>         define foo
>         multi
>         line message
>         output
>         endef
>
>         define newline
>
>
>         endef   
>
>         space :=
>         space += #
>
>         safe-char := |
>         make-list-at-newline = $(subst $(newline),$(space),$(subst
>         $(space),$(safe-char),$1))
>         output-message = $(foreach m,$(call make-list-at-newline,$1),
>         $(shell echo $(subst $(safe-char),$(space),$m) 1>&2))
>
>         $(call output-message,$(foo))
>         $(call output-message,single line)

One problem with this (aside from output going to stderr and one 
process per line of output) is that shell meta-characters in the string 
need to be quoted. We can do this by putting quotes around the 
arguments to echo, but we also need to back-quote any quote characters 
inside. This seems pretty convoluted.

-Pete