To be able to support JDK-8244410, we need to have a better way to
handle dependencies. For this reason, the macro SetupTarget is
introduced. It will take as input everything that is needed to create a
top-level target in Main.gmk.
As a positive side-effect, it will finally once again be possible to
list the dependencies for a rule together with the recipe, fixing a
shortcoming that has plagues Main.gmk for a long time.
In this patch, I create a trivial version of SetupTarget, and switch
trivial recipes to use this function. By this, I mean recipes that just
delegate to another makefile, possible setting a specific target and/or
make arguments. Specifically, this excludes generated target patterns,
as for the module phases.
Trivial dependencies are also moved into this function. By this, I mean
"literal" dependencies. Dependencies that are calculated using variables
or macros might change if they are moved around in the file, and need a
more thorough analysis before they can be moved.
My intention is to continue moving targets in Main.gmk into the scope of
SetupTarget, but to avoid regressions and difficult code reviews, I will
do this step by step.
Bug: https://bugs.openjdk.java.net/browse/JDK-8244757
WebRev:
http://cr.openjdk.java.net/~ihse/JDK-8244757-introduce-SetupTarget/webrev.01
/Magnus
