Re: parallel rebuild

[Angel Tsankov]

> %% "Angel Tsankov" <address@hidden> writes:
>
>  at> I have a makefile that looks something like this (the build
> target has
>  at> been omitted):
>
>  at> .PHONY: clean build build_after_clean rebuild
>  at> rebuild:   clean build_after_clean
>  at>  @echo "rebuilt"
>  at> build_after_clean: clean build
>  at>  @echo "built"
>  at> clean:
>  at> # remove object and output files
>  at>  @echo "cleaned"
>
>  at> I should probably add that "make rebuild" works fine every time
> it
>  at> is executed. I'm using GNU make 3.80 on Windows XP Pro. How can
> I
>  at> cope with this unfortunate situation?
>
> Interesting.  I wasn't aware that parallelism worked on Windows
> platforms.

Ha-ha-haaa... What a futile attempt at being funny!

> Anyway, nowhere above have you declared that the "clean" target
> depends
> on "build".  Also, you don't show the "build" target so all we can
> do is
> assume it is not defined to depend on "clean".
>
> That being the case, the order in which "build" is invoked relative
> to
> "clean" is not defined.  It could be invoked first, or second.  I'm
> not
> sure if this is your problem or not; without a definition of "build"
> I
> don't see any other issue above.

You have obviously missed the point, Paul. This is so bad for you:(
Now, let me explain the situation in more detail specially for you.
So, one normally has a build and a clean target that do smth but they
DO NOT depend on each other, right, Paul? Then, the same guy needs a
rebuild target that performs a clean followed by a build. I hope you
have no problem following me so far, do you? If so, may I am I 
expected to implement such a rebuild target.

> You might check on the address@hidden mailing list for more help
> with
> Windows-specific issues, as well.

I am not sure this is a Windows-specific problem. Have a look at this 
output from a dual G4 PowerPC (running yellowdog linux):
make -j 2 rebuild
g++ -c -o a.o a.cpp
g++ -c -o main.o main.cpp
g++ -o test a.o main.o
make -j 2 rebuild
make -j 2 rebuild
g++ -c -o a.o a.cpp
g++ -c -o main.o main.cpp
g++ -o test a.o main.o
make -j 2 rebuild
make -j 2 rebuild
g++ -c -o a.o a.cpp
g++ -c -o main.o main.cpp
g++ -o test a.o main.o

The test suite is contained in the attached archive.



Wish you some more inspiration this time, Paul.

parallel_rebuild.zip
Description: Binary data