> Most of spec.gmk contains lines on the form:
> 
> VAR := @VAR@
> 
> which are setup using `AC_SUBST(VAR)` in the configure script. However, there 
> are also some other stuff there, which are mostly put there since we had no 
> other good place to do so.
> 
> I have now created a new file, `CommonVars.gmk`, which is automatically 
> included, and moved everything but pure configure assignments from `spec.gmk` 
> into this file.
> 
> That makes `spec.gmk` a great interface between configure and make -- the job 
> of configure is to fill in `spec.gmk`, plain and simple.
> 
> This refactoring also points to additional future improvements, e.g. 
> generating `spec.gmk` automatically from all `AC_SUBST` statements, and to 
> clean up the new `CommonVars.gmk`. Right now I kept all lines in the same 
> order as they appeared in `spec.gmk.template`, to minimize risk of 
> unintentional changes (we have some non-`:=` assignments), and to facilitate 
> comparison for this patch. It is also clear that we have room for improvement 
> in how we do bootcycle-builds and build the build-jdk. My current solution is 
> to keep the special spec files, even if they just set a single special flag, 
> to minimize impact of this patch.

Magnus Ihse Bursie has updated the pull request incrementally with one 
additional commit since the last revision:

  Fix comment and remove dead code

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/27452/files
  - new: https://git.openjdk.org/jdk/pull/27452/files/96cb18e3..91b24f8e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27452&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27452&range=00-01

  Stats: 5 lines in 1 file changed: 0 ins; 3 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/27452.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27452/head:pull/27452

PR: https://git.openjdk.org/jdk/pull/27452

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