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python3-cffi: Fix failing ptests with clang

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Clang finds additional warnings with cffi generated code

_CFFI_test_verify_anonymous_struct_with_star_typedef.cpp:587:10: error: non-constant-expression cannot be narrowed from type 'long' to 'size_t' (ak│a 'unsigned long') in initializer list [-Wc++11-narrowing]

(From OE-Core rev: 470edc62b1821bcbb679bd3822acd98e9996c9e7)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Khem Raj
2025-02-04 14:09:30 -08:00
committed by Richard Purdie
parent 31a537d124
commit 0bf496f24b
2 changed files with 36 additions and 1 deletions
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34
meta/recipes-devtools/python/python3-cffi/0001-Cast-offset-to-size_t-to-avoid-c-11-narrowing-warnin.patch Normal file
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@@ -0,0 +1,34 @@
From 2ac63f8765e62f1492ef3ee06791636700bc6cfb Mon Sep 17 00:00:00 2001
From: triallax <triallax@tutanota.com>
Date: Sat, 29 Jun 2024 15:25:24 +0100
Subject: [PATCH] Cast offset to size_t to avoid c++11-narrowing warning (#92)
e.g. with clang 18 on chimera linux:
_CFFI_test_verify_anonymous_struct_with_star_typedef.cpp:583:10: error: non-constant-expression cannot be narrowed from type 'long' to 'size_t' (aka 'unsigned long') in initializer list [-Wc++11-narrowing]
583 | { "a", ((char *)&((foo_t)4096)->a) - (char *)4096,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
_CFFI_test_verify_anonymous_struct_with_star_typedef.cpp:583:10: note: insert an explicit cast to silence this issue
583 | { "a", ((char *)&((foo_t)4096)->a) - (char *)4096,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| static_cast<size_t>( )
Upstream-Status: Backport [https://github.com/python-cffi/cffi/pull/92]
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
src/cffi/recompiler.py | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/cffi/recompiler.py b/src/cffi/recompiler.py
index ac6c163e..14d578ee 100644
--- a/src/cffi/recompiler.py
+++ b/src/cffi/recompiler.py
@@ -953,7 +953,7 @@ class Recompiler:
if cname is None or fbitsize >= 0:
offset = '(size_t)-1'
elif named_ptr is not None:
- offset = '((char *)&((%s)4096)->%s) - (char *)4096' % (
+ offset = '(size_t)(((char *)&((%s)4096)->%s) - (char *)4096)' % (
named_ptr.name, fldname)
else:
offset = 'offsetof(%s, %s)' % (tp.get_c_name(''), fldname)