( )⚙ D12207 zstd: hack include order to ensure that our zstd.h is found

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Differential D12207

zstd: hack include order to ensure that our zstd.h is found
Needs ReviewPublic

Authored by joerg.sonnenberger on Feb 21 2022, 8:45 AM.

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Summary

If the regular Python CFLAGS include directories that already have the
zstd headers available, a different and possible incompatible version
can be picked up otherwise. Sadly, it seems like Python has no easy way
to prefix flags before the rest.

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indygreg added a subscriber: indygreg.Feb 21 2022, 1:51 PM

Do you think we can do this upstream?

I think the vendored version of python-zstandard can be upgraded to the latest version now that Python 2 support has been dropped. (Although there may be a Python 3.5 support question.)

I'd prefer if we could facilitate this workaround in the upstream project and not require Mercurial to patch python-zstandard's sources.

Revision Contents
Changeset List

Diff 32272

contrib/python-zstandard/setup_zstd.py

if support_legacy: if support_legacy:
sources.update( sources.update(
[os.path.join(actual_root, p) for p in zstd_sources_legacy] [os.path.join(actual_root, p) for p in zstd_sources_legacy]
) )
sources = list(sources) sources = list(sources)
include_dirs = set([os.path.join(actual_root, d) for d in ext_includes]) include_dirs = set([os.path.join(actual_root, d) for d in ext_includes])
if not system_zstd: if not system_zstd:
include_dirs.update( from distutils import sysconfig
[os.path.join(actual_root, d) for d in zstd_includes] try:
) from shlex import quote
except ImportError:
from pipes import quote
includes = []
for incdir in [os.path.join(actual_root, d) for d in zstd_includes]:
includes.append('-I' + quote(incdir))
include_dirs.add(incdir)
config_vars = sysconfig.get_config_vars()
config_vars['CFLAGS'] = ' '.join(includes + [config_vars.get('CFLAGS', '')])
if support_legacy: if support_legacy:
include_dirs.update( include_dirs.update(
[os.path.join(actual_root, d) for d in zstd_includes_legacy] [os.path.join(actual_root, d) for d in zstd_includes_legacy]
) )
include_dirs = list(include_dirs) include_dirs = list(include_dirs)
depends = [os.path.join(actual_root, p) for p in zstd_depends] depends = [os.path.join(actual_root, p) for p in zstd_depends]