diff options
Diffstat (limited to 'meta/recipes-devtools/binutils/binutils/0013-Define-alignof-using-_Alignof-when-using-C11-or-newe.patch')
-rw-r--r-- | meta/recipes-devtools/binutils/binutils/0013-Define-alignof-using-_Alignof-when-using-C11-or-newe.patch | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/meta/recipes-devtools/binutils/binutils/0013-Define-alignof-using-_Alignof-when-using-C11-or-newe.patch b/meta/recipes-devtools/binutils/binutils/0013-Define-alignof-using-_Alignof-when-using-C11-or-newe.patch new file mode 100644 index 0000000000..0cb2f46a07 --- /dev/null +++ b/meta/recipes-devtools/binutils/binutils/0013-Define-alignof-using-_Alignof-when-using-C11-or-newe.patch | |||
@@ -0,0 +1,48 @@ | |||
1 | From d479020609329cdc7fa3675bc3daf072401fefae Mon Sep 17 00:00:00 2001 | ||
2 | From: Khem Raj <raj.khem@gmail.com> | ||
3 | Date: Sun, 15 Jan 2023 00:16:25 -0800 | ||
4 | Subject: [PATCH] Define alignof using _Alignof when using C11 or newer | ||
5 | |||
6 | WG14 N2350 made very clear that it is an UB having type definitions | ||
7 | within "offsetof" [1]. This patch enhances the implementation of macro | ||
8 | alignof to use builtin "_Alignof" to avoid undefined behavior on | ||
9 | when using std=c11 or newer | ||
10 | |||
11 | clang 16+ has started to flag this [2] | ||
12 | |||
13 | Fixes build when using -std >= gnu11 and using clang16+ | ||
14 | |||
15 | Older compilers gcc < 4.9 or clang < 8 has buggy _Alignof even though it | ||
16 | may support C11, exclude those compilers too | ||
17 | |||
18 | [1] https://www.open-std.org/jtc1/sc22/wg14/www/docs/n2350.htm | ||
19 | [2] https://reviews.llvm.org/D133574 | ||
20 | |||
21 | Upstream-Status: Pending | ||
22 | Signed-off-by: Khem Raj <raj.khem@gmail.com> | ||
23 | --- | ||
24 | libiberty/sha1.c | 10 ++++++++++ | ||
25 | 1 file changed, 10 insertions(+) | ||
26 | |||
27 | diff --git a/libiberty/sha1.c b/libiberty/sha1.c | ||
28 | index 49e8e0b6c2b..72de5cc8ad6 100644 | ||
29 | --- a/libiberty/sha1.c | ||
30 | +++ b/libiberty/sha1.c | ||
31 | @@ -234,7 +234,17 @@ sha1_process_bytes (const void *buffer, size_t len, struct sha1_ctx *ctx) | ||
32 | if (len >= 64) | ||
33 | { | ||
34 | #if !_STRING_ARCH_unaligned | ||
35 | +/* GCC releases before GCC 4.9 had a bug in _Alignof. See GCC bug 52023 | ||
36 | + <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52023>. | ||
37 | + clang versions < 8.0.0 have the same bug. */ | ||
38 | +#if (!defined __STDC_VERSION__ || __STDC_VERSION__ < 201112 \ | ||
39 | + || (defined __GNUC__ && __GNUC__ < 4 + (__GNUC_MINOR__ < 9) \ | ||
40 | + && !defined __clang__) \ | ||
41 | + || (defined __clang__ && __clang_major__ < 8)) | ||
42 | # define alignof(type) offsetof (struct { char c; type x; }, x) | ||
43 | +#else | ||
44 | +# define alignof(type) _Alignof(type) | ||
45 | +#endif | ||
46 | # define UNALIGNED_P(p) (((size_t) p) % alignof (sha1_uint32) != 0) | ||
47 | if (UNALIGNED_P (buffer)) | ||
48 | while (len > 64) | ||