re: bsd.lib.mk question

[matthew green <mrg%eterna.com.au@localhost>]

> > SRCS=       a.c b.c
> > 
> > a.c b.c:
> >     echo 'int foo;' > ${.TARGET}
> 
> > If you run that, you will see two calls for echo.
> 
> But your commands don't (well, your command doesn't) build two files;
> it builds only one.  Naturally make has to run it again for the other.
> 
> Try, instead,
> 
> a.c b.c:
>       echo 'int foo;' > a.c
>       echo 'int foo;' > b.c
> 
> You'll find - well, I find, at least - that it runs the command set
> only once.

make -j is the problem.  eg:

xotica ~> make -f a.mk -j10 b.c a.c
--- b.c ---
--- a.c ---
--- b.c ---
echo 'int foo;' > a.c
--- a.c ---
echo 'int foo;' > a.c
--- b.c ---
echo 'int foo;' > b.c
--- a.c ---
echo 'int foo;' > b.c



.mrg.