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gh-136097: Fix sysconfig._parse_makefile() #136166

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gh-136097: Fix sysconfig._parse_makefile() #136166

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@serhiy-storchaka serhiy-storchaka commented Jul 1, 2025 •
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  • Fix potential infinite recursion.
  • Fix a bug when reference can cross boundaries of substitutions, e.g. a=$( b=$(a)a)
  • Fix potential quadratic complexity.
  • Fix KeyError for undefined CFLAGS, LDFLAGS, or CPPFLAGS.
  • Fix infinite recursion when keep_unresolved=False.
  • Unify behavior with keep_unresolved=False for bogus $ occurred before and after variable references.

@serhiy-storchaka serhiy-storchaka requested a review from FFY00 as a code owner July 1, 2025 11:45
@serhiy-storchaka serhiy-storchaka added needs backport to 3.13 bugs and security fixes needs backport to 3.14 bugs and security fixes labels Jul 1, 2025
@bedevere-app bedevere-app bot mentioned this pull request Jul 1, 2025
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@serhiy-storchaka serhiy-storchaka removed needs backport to 3.13 bugs and security fixes needs backport to 3.14 bugs and security fixes labels Jul 1, 2025
@serhiy-storchaka
pythongh-136097: Fix sysconfig._parse_makefile()
3888755 
* Fix potential infinite recursion.
* Fix a bug when reference can cross boundaries of substitutions, e.g.
  a=$(
  b=$(a)a)
* Fix potential quadratic complexity.
* Fix KeyError for undefined CFLAGS, LDFLAGS, or CPPFLAGS.
* Fix infinite recursion when keep_unresolved=False.
* Unify behavior with keep_unresolved=False for bogus $ occurred before
  and after variable references.
@serhiy-storchaka serhiy-storchaka force-pushed the sysconfig-parse_makefile branch from 967214c to 3888755 Compare July 1, 2025 12:31
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