RFR: 8313374: --enable-ccache's CCACHE_BASEDIR breaks builds [v4]

[Jan Kratochvil]

> https://bugs.openjdk.org/browse/JDK-8313374
> --enable-ccache's CCACHE_BASEDIR breaks builds

Jan Kratochvil has updated the pull request incrementally with one additional commit since the last revision:

  Adjust compatibility with FILE_MACRO_CFLAGS.

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/15080/files
  - new: https://git.openjdk.org/jdk/pull/15080/files/eb4a4ee7..96aa5a3b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15080&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15080&range=02-03

  Stats: 18 lines in 2 files changed: 13 ins; 4 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/15080.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15080/head:pull/15080

PR: https://git.openjdk.org/jdk/pull/15080