[UNIKRAFT PATCH 0/7] Pre-processing rules for generating headers

[Simon Kuenzer <simon.kuenzer@xxxxxxxxx>]

The final target of this patch series is to enable generating header
files with pre-processors, like M4 and AWK.
For this purpose, another build stage is introduced: `preprocess`.
This stage should make sure that headers are generated before
compiling starts.

Simon Kuenzer (7):
  build: Enable extending pre-processing rules
  build: Use secondary expansion for M4 pre-processing
  build: Per-file flags and includes for M4 pre-processing
  build: Pre-processing rule for AWK progfiles
  build: Introduce pre-processing build stage (`preprocess`)
  build: `*.in` files as pure pre-processed files
  build: Support generating C/C++ headers with pre-processing

 Makefile                     |  9 +++-
 support/build/Makefile.rules | 79 +++++++++++++++++++++++++++++-------
 2 files changed, 72 insertions(+), 16 deletions(-)

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2.20.1