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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>
35 lines
1.7 KiB
Diff
35 lines
1.7 KiB
Diff
From 2ac63f8765e62f1492ef3ee06791636700bc6cfb Mon Sep 17 00:00:00 2001
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From: triallax <triallax@tutanota.com>
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Date: Sat, 29 Jun 2024 15:25:24 +0100
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Subject: [PATCH] Cast offset to size_t to avoid c++11-narrowing warning (#92)
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e.g. with clang 18 on chimera linux:
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_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]
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583 | { "a", ((char *)&((foo_t)4096)->a) - (char *)4096,
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| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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_CFFI_test_verify_anonymous_struct_with_star_typedef.cpp:583:10: note: insert an explicit cast to silence this issue
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583 | { "a", ((char *)&((foo_t)4096)->a) - (char *)4096,
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| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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| static_cast<size_t>( )
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Upstream-Status: Backport [https://github.com/python-cffi/cffi/pull/92]
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Signed-off-by: Khem Raj <raj.khem@gmail.com>
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---
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src/cffi/recompiler.py | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/src/cffi/recompiler.py b/src/cffi/recompiler.py
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index ac6c163e..14d578ee 100644
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--- a/src/cffi/recompiler.py
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+++ b/src/cffi/recompiler.py
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@@ -953,7 +953,7 @@ class Recompiler:
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if cname is None or fbitsize >= 0:
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offset = '(size_t)-1'
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elif named_ptr is not None:
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- offset = '((char *)&((%s)4096)->%s) - (char *)4096' % (
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+ offset = '(size_t)(((char *)&((%s)4096)->%s) - (char *)4096)' % (
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named_ptr.name, fldname)
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else:
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offset = 'offsetof(%s, %s)' % (tp.get_c_name(''), fldname)
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