Re: No rule to make target

[thutt]

Federico Bruni writes:
 >
 >
 > Il giorno gio 29 mar 2018 alle 15:56, Paul Smith <address@hidden> ha
 > scritto:
 > > On Thu, 2018-03-29 at 14:09 +0200, Federico Bruni wrote:
 > >>  VPATH = \
 > >>    $CURDIR/src
 > >
 > > This is wrong.  This expands the make variable $C and appends the
 > > string "URDIR/src".  Since C is not set (most likely) you'll get:
 > >
 > >    VPATH = URDIR/src
 > >
 > > which doesn't exist, so this is a no-op.
 > >
 > > You meant:
 > >
 > >     VPATH = $(CURDIR)/src
 >
 > Yes, indeed, it's an oversight.

 Here's one way that VPATH can be used, with your original directory
 structure.  The example is a bit convoluted.  A recursive Make
 invocation is done to make the working directory be the 'out'
 directory.  The VPATH allows the sources to be found in the 'src'
 directory:

    export ROOT     ?= $(shell pwd)
    VPATH           = $(ROOT)/src
    MD              = $(wildcard $(ROOT)/src/*.md)
    PDF             = $(addsuffix .pdf, $(notdir $(basename $(MD))))

    %.pdf: %.md
            echo pandoc -f markdown -o $@ $<;       \
            touch $@;

    all:
            $(MAKE) -C $(ROOT)/out -f $(ROOT)/$(lastword $(MAKEFILE_LIST)) book

    book:   $(PDF)


--
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