Re: make rule of multiple file generation (was Re: CVS commit: src/share/mk)

[Masao Uebayashi <uebayasi%tombi.co.jp@localhost>]

> This has nothing to do with yacc; the rules in that Makefile are wrong.
> 
> instead of:
> 
>     nodes.h: nodes.c
>     nodes.c: mknodes.sh nodetypes nodes.c.pat
> 
> it should be:
> 
>     nodes.h nodes.c: mknodes.sh nodetypes nodes.c.pat

        % /src/netbsd/work.TNF/landisk/tools/bin/nbmake-landisk -j 2 nodes.h 
nodes.c
             create  sh/nodes.c
             create  sh/nodes.h
        mv: rename /src/netbsd/work.TNF/landisk/obj/bin/sh/nodes.h.tmp to 
/src/netbsd/work.TNF/landisk/obj/bin/sh/nodes.h: No such file or directory
        --- nodes.h ---
        *** [nodes.h] Error code 1
        1 error

        nbmake: stopped in /src/netbsd/src.TNF/bin/sh

"a b: c" doesn't describe a 1-to-N generation, but just a syntax sugar of
"a: c" and "b: c".  make(1) tries to build a and b in two jobs and gets
confused.

You'll realize what $GENCMD does is a solution, not a work-around.

Masao

-- 
Masao Uebayashi / Tombi Inc. / Tel: +81-90-9141-4635