Re: Maximizing Library Build Parallelism

[Christophe LYON]

On 13.01.2009 16:12, EXT-Pennington, Dale K wrote:
> Folks,
>
> I am using gmake 3.80 and an AIX 6.1 system. We are working to upgrade
> our make setup to allow us to use the -j option whereever we can to
> speed up builds.
>
> The particular issue is libraries. The make manuals warns about building
> parts of a library in parallel because multiple processes attemping ar
> commands on the same archive at the same time might corrupt said
> archive.

why wouldn't you use a single library rule, such as:
mylib.a: $(OBJS)
        ar cr $@ $^

This way, your $OBJS can be built in parallel, while the library can be 
built only once all objects are ready.

Christophe.