Re: -r, .SUFFIXES:

[John Graham-Cumming]

Boris Kolpackov wrote:
> You probably mean *built-in* implicit rules here:
>
> .SUFFIXES:
>
> ifeq ($(filter -r,$(MAKEFLAGS)),)
> MAKEFLAGS += -r
> endif

That'll work but note that '-r' will not necessarily appear in MAKEFLAGS 
because of the 'interesting' way in which MAKEFLAGS is created. 
Consider for example:

    all: ; @echo $(MAKEFLAGS)

Running make -r outputs:

    r

John.
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