When using the built-in $(error text) and $(warning text) functions of GNU Make, how can I get line breaks into the error/warning output without acrobatics?

By acrobatics I mean funny methods such as these two:

$(warning $(shell /bin/echo -e "something\nfoo\nbar\nbaz"))
$(warning $(shell /bin/bash -c 'echo  -e "something\nfoo\nbar\nbaz"'))

which, btw, didn't work for me with GNU Make 3.81 on Ubuntu 10.04.

Rationale: I want to make the error output in conditional parts (ifeq, ifneq) of my GNUmakefile more readable.

The current workaround for me is to use for each line:

$(warning ...)

and finally for the last line:

$(error ...)
makefile gnu-make
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