Subject: Re: Make: Can implicit rules be forced to make
non-existing prerequisites? - msg#00017
James wrote:
> Jan T. Kim wrote:
> > Dear all,
> >
> > I want to set up a Makefile to handle installation and checking etc.
> > of a bunch of R packages, and I'd like to be able to add a new
> > package by just adding the new name to a variable. I use implicit
> > rules to try and pull this off. The problem I run into is that make
> > cannot
> > be bothered to make prerequisites required by an implicit rule, but in
> > my
> > case, that's what I need.
> >
> > Here's my Makefile:
> >
> > RPACKS = xpipe jtkstuff
> > RPACKS_INSTALL = $(RPACKS:%=%-install)
> > RPACKS_UNINSTALL = $(RPACKS:%=%-uninstall)
> > RPACKS_CHECK = $(RPACKS:%=%-check)
> >
> > install : $(RPACKS_INSTALL)
> >
> > # explicit rule: target is unconditionally made
> > jtkstuff-install :
> > echo target: $@ prerequisites: $^
> > R CMD INSTALL jtkstuff
> >
> > # implicit rule: nothing is made
> > %-install :
> > echo target: $@ prerequisites: $^
> > R CMD INSTALL $*
> >
> > .PHONY : install uninstall check clean $(RPRACKS) $(RPACKS_INSTALL)
[snip]
> How about commenting out .PHONY line?
Ok -- that's the solution indeed. The reason is that .PHONY triggers
skipping of the implicit target search as an optimising side effect,
which I overlooked. Thanks for the pointer.
Specifically, it suffices to remove $(RPACKS_INSTALL) from the
.PHONY target. Of course, this opens the hole that if somehow a
xpipe-install file or directory appears, the implicit rule won't fire
anymore. To work around this, I now made a phony "implicit" target
that is a prerequisite of the implicit rules that I want to execute
unconditionally:
%-install : implicit
echo target: $@ prerequisites: $^
R CMD INSTALL $*
.PHONY : install uninstall check clean implicit $(RPRACKS)
Best regards, Jan
Thread at a glance:
Previous Message by Date:
Re: Make: Can implicit rules be forced to make non-existing prerequisites?
Jan T. Kim wrote:
> Dear all,
>
> I want to set up a Makefile to handle installation and checking etc.
> of a bunch of R packages, and I'd like to be able to add a new
> package by just adding the new name to a variable. I use implicit
> rules to try and pull this off. The problem I run into is that make
> cannot
> be bothered to make prerequisites required by an implicit rule, but in
> my
> case, that's what I need.
>
> Here's my Makefile:
>
> RPACKS = xpipe jtkstuff
> RPACKS_INSTALL = $(RPACKS:%=%-install)
> RPACKS_UNINSTALL = $(RPACKS:%=%-uninstall)
> RPACKS_CHECK = $(RPACKS:%=%-check)
>
> install : $(RPACKS_INSTALL)
>
> # explicit rule: target is unconditionally made
> jtkstuff-install :
> echo target: $@ prerequisites: $^
> R CMD INSTALL jtkstuff
>
> # implicit rule: nothing is made
> %-install :
> echo target: $@ prerequisites: $^
> R CMD INSTALL $*
>
> .PHONY : install uninstall check clean $(RPRACKS) $(RPACKS_INSTALL)
>
> make -n -d install shows the problem:
>
> Updating goal targets....
> Considering target file `install'.
> File `install' does not exist.
> Considering target file `xpipe-install'.
> File `xpipe-install' does not exist.
> Finished prerequisites of target file `xpipe-install'.
> Must remake target `xpipe-install'.
> Successfully remade target file `xpipe-install'.
> Considering target file `jtkstuff-install'.
> File `jtkstuff-install' does not exist.
> Finished prerequisites of target file `jtkstuff-install'.
> Must remake target `jtkstuff-install'.
> echo target: jtkstuff-install prerequisites:
> R CMD INSTALL jtkstuff
> Successfully remade target file `jtkstuff-install'.
> Finished prerequisites of target file `install'.
> Must remake target `install'.
> Successfully remade target file `install'.
>
> Obviously, make handles the explicit jtkstuff-install rule differently
> from the implicit %-install rule in that it does execute the commands
> for the former while it considers the implicitly specified target
> xpipe-install to be remade without actually doing anything.
>
> Is there any way to change this behaviour?
>
> Regards & thanks in advance, Jan
How about commenting out .PHONY line?
James
Next Message by Date:
Re: Make: Can implicit rules be forced to make non-existing prerequisites?
"Jan T. Kim" <jtkim@xxxxxx> wrote:
> .PHONY : install uninstall check clean $(RPRACKS) $(RPACKS_INSTALL)
> Obviously, make handles the explicit jtkstuff-install rule differently
> from the implicit %-install rule in that it does execute the commands
> for the former while it considers the implicitly specified target
> xpipe-install to be remade without actually doing anything.
>
> Is there any way to change this behaviour?
Try to remove $(RPRACKS) from the .PHONY line like this:
.PHONY : install uninstall check clean $(RPACKS_INSTALL)
It seems as if phony targets does not work in implicit rules.
regards Henrik
--
The address in the header is only to prevent spam. My real address is:
hc8(at)uthyres.com Examples of addresses which go to spammers:
root@xxxxxxxxxxxxx root@localhost
Previous Message by Thread:
Re: Make: Can implicit rules be forced to make non-existing prerequisites?
Jan T. Kim wrote:
> Dear all,
>
> I want to set up a Makefile to handle installation and checking etc.
> of a bunch of R packages, and I'd like to be able to add a new
> package by just adding the new name to a variable. I use implicit
> rules to try and pull this off. The problem I run into is that make
> cannot
> be bothered to make prerequisites required by an implicit rule, but in
> my
> case, that's what I need.
>
> Here's my Makefile:
>
> RPACKS = xpipe jtkstuff
> RPACKS_INSTALL = $(RPACKS:%=%-install)
> RPACKS_UNINSTALL = $(RPACKS:%=%-uninstall)
> RPACKS_CHECK = $(RPACKS:%=%-check)
>
> install : $(RPACKS_INSTALL)
>
> # explicit rule: target is unconditionally made
> jtkstuff-install :
> echo target: $@ prerequisites: $^
> R CMD INSTALL jtkstuff
>
> # implicit rule: nothing is made
> %-install :
> echo target: $@ prerequisites: $^
> R CMD INSTALL $*
>
> .PHONY : install uninstall check clean $(RPRACKS) $(RPACKS_INSTALL)
>
> make -n -d install shows the problem:
>
> Updating goal targets....
> Considering target file `install'.
> File `install' does not exist.
> Considering target file `xpipe-install'.
> File `xpipe-install' does not exist.
> Finished prerequisites of target file `xpipe-install'.
> Must remake target `xpipe-install'.
> Successfully remade target file `xpipe-install'.
> Considering target file `jtkstuff-install'.
> File `jtkstuff-install' does not exist.
> Finished prerequisites of target file `jtkstuff-install'.
> Must remake target `jtkstuff-install'.
> echo target: jtkstuff-install prerequisites:
> R CMD INSTALL jtkstuff
> Successfully remade target file `jtkstuff-install'.
> Finished prerequisites of target file `install'.
> Must remake target `install'.
> Successfully remade target file `install'.
>
> Obviously, make handles the explicit jtkstuff-install rule differently
> from the implicit %-install rule in that it does execute the commands
> for the former while it considers the implicitly specified target
> xpipe-install to be remade without actually doing anything.
>
> Is there any way to change this behaviour?
>
> Regards & thanks in advance, Jan
How about commenting out .PHONY line?
James
Next Message by Thread:
Re: Make: Can implicit rules be forced to make non-existing prerequisites?
"Jan T. Kim" <jtkim@xxxxxx> wrote:
> .PHONY : install uninstall check clean $(RPRACKS) $(RPACKS_INSTALL)
> Obviously, make handles the explicit jtkstuff-install rule differently
> from the implicit %-install rule in that it does execute the commands
> for the former while it considers the implicitly specified target
> xpipe-install to be remade without actually doing anything.
>
> Is there any way to change this behaviour?
Try to remove $(RPRACKS) from the .PHONY line like this:
.PHONY : install uninstall check clean $(RPACKS_INSTALL)
It seems as if phony targets does not work in implicit rules.
regards Henrik
--
The address in the header is only to prevent spam. My real address is:
hc8(at)uthyres.com Examples of addresses which go to spammers:
root@xxxxxxxxxxxxx root@localhost