https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=268278
Bug ID: 268278
Summary: graphics/py-pygraphviz: fix build with clang 15
Product: Ports & Packages
Version: Latest
Hardware: Any
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: Individual Port(s)
Assignee: [email protected]
Reporter: [email protected]
Assignee: [email protected]
Flags: maintainer-feedback?([email protected])
During an exp-run for llvm 15 (see bug 265425), it turned out that
graphics/py-pygraphviz failed to build with clang 15:
pygraphviz/graphviz_wrap.c:3047:12: error: incompatible pointer to integer
conversion returning 'Agsym_t *' (aka 'struct Agsym_s *') from a function with
result type 'int' [-Wint-conversion]
return agattr(g, kind, name, val);
^~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
In graphviz.i and the swig-generated graphviz_wrap.c, the agattr_label()
function is incorrectly labeled as returning 'int', while it should return
'Agsym_t *' instead. Upstream fixed this as part of a much bigger commit [1],
and they also regenerated the swig wrapper.
For our case, it is simpler to patch the wrapper instead, as otherwise you
would have to add swig as a build-time dependency.
[1]
https://github.com/pygraphviz/pygraphviz/commit/79fdee178785620b90241c70a0efab9dd57e3c86
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