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west: sign.py: explain why -P is passed to cpp

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Zero-functional change.

Also move it to a separate line so it's more convenient to temporarily
comment it out.

Signed-off-by: Marc Herbert <marc.herbert@intel.com>
This commit is contained in:
Marc Herbert 2023-12-26 23:40:46 +00:00 • committed by Anas Nashif
commit a27e8f9a19
1 changed files with 6 additions and 1 deletions
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7
scripts/west_commands/sign.py
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@ -438,7 +438,12 @@ class RimageSigner(Signer):
'Runs the C pre-processor on config_dir/toml_basename.h'
compiler_path = self.cmake_cache.get("CMAKE_C_COMPILER")
preproc_cmd = [compiler_path, '-P', '-E', str(config_dir / (toml_basename + '.h'))]
preproc_cmd = [compiler_path, '-E', str(config_dir / (toml_basename + '.h'))]
# -P removes line markers to keep the .toml output reproducible. To
# trace #includes, temporarily comment out '-P' (-f*-prefix-map
# unfortunately don't seem to make any difference here and they're
# gcc-specific)
preproc_cmd += ['-P']
preproc_cmd += ['-I', str(self.sof_src_dir / 'src')]
preproc_cmd += ['-imacros',
str(pathlib.Path('zephyr') / 'include' / 'generated' / 'autoconf.h')]