(info "(make) Chained Rules") says
The second difference is that if 'make' _does_ create B in order to
update something else, it deletes B later on after it is no longer
needed. Therefore, an intermediate file which did not exist before
'make' also does not exist after 'make'. 'make' reports the deletion to
you by printing a 'rm -f' command showing which file it is deleting.
I only saw an 'rm', not rm -f. So the documentation needs fixing.
Also here,
Ordinarily, a file cannot be intermediate if it is mentioned in the
makefile as a target or prerequisite. However, you can explicitly mark
a file as intermediate by listing it as a prerequisite of the special
target '.INTERMEDIATE'. This takes effect even if the file is mentioned
explicitly in some other way.
be sure to say which of
.INTERMEDIATE: %.qq *.qq bla.qq
will work. Same for .PRECIOUS, .SECONDARY etc.
Yes .PRECIOUS mentions the % form will work, but do mention all.
