Re: Error in processing of :: targets

[Howard Chu]

address@hidden wrote:
> Gnumake maintainers,
>  
> I've run into a functional difference between the standard unix make and 
> GNUmake (3.80) involving how the :: rules are processed.
>  
> In the standard unix make (Solaris), the :: targets ( i.e., all::) are 
> process in the order they are found in the Makefile serially, regardless 
> of whether parallelism is used (i.e., -jN, where N is > 1).

That's funny, my "standard Unix" (Solaris) make doesn't have a "-j" 
switch, and doesn't support parallelism. In fact, -j is a GNU-specific 
extension, and it Works As Designed.
>  
> In GNUmake (3.80), the when -j1 is used, the "::" targets are executed 
> serially.  When -jN is used the "::" targets are executed in parallel.

> Consider the following -- from an IMAKE generated Makefile:

This, like most of the dreck that Imake produces, is bogus.

http://lists.gnu.org/archive/html/bug-make/2001-09/msg00013.html
http://lists.gnu.org/archive/html/bug-make/2004-09/msg00001.html

> all:: all.prologue
> all:: all.serial all.parallel
> all:: ; @echo $@; sleep 1; echo address@hidden <mailto:address@hidden>
> all:: all.epilogue
>  
> all.epilogue all.prologue:: ; @echo $@; sleep 2; echo address@hidden 
> <mailto:address@hidden>
> all.serial:: ; @echo address@hidden <mailto:address@hidden>; sleep 1; echo address@hidden 
> <mailto:address@hidden>
> all.serial:: ; @echo address@hidden <mailto:address@hidden>; sleep 1; echo address@hidden 
> <mailto:address@hidden>
> all.parallel: aaa bbb ccc
> aaa bbb ccc: ; @echo $@; sleep 1; echo address@hidden <mailto:address@hidden>

--
  -- Howard Chu
  Chief Architect, Symas Corp.       Director, Highland Sun
  http://www.symas.com               http://highlandsun.com/hyc
  Symas: Premier OpenSource Development and Support