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53dd45d573
Brings following fixes.
* 553c7f61b74 x86: Display -msse-check= default as none
* 4f7d1d2d5ec PowerPC: Add support for Power11 options
* 3c1f1c35784 x86-64: Add R_X86_64_CODE_6_GOTTPOFF
* c426c8e307a x86/APX: VROUND{P,S}{S,D} encodings require AVX512{F,VL}
* 78f9e9faaa4 PR31208, strip can break ELF alignment requirements
* e19278f72bd PR 31283 windmc: Parse input correctly on big endian hosts
* b76b8983116 Link x86-64 mark-plt-1.so with --no-as-needed
* e92e2d654bf LoongArch: gas: Fix the types of symbols referred with %le_*_r in the symtab
(From OE-Core rev: 1e24197070abbeabfca1883975b9996f29898745)
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
49 lines
1.8 KiB
Diff
49 lines
1.8 KiB
Diff
From d479020609329cdc7fa3675bc3daf072401fefae Mon Sep 17 00:00:00 2001
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From: Khem Raj <raj.khem@gmail.com>
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Date: Sun, 15 Jan 2023 00:16:25 -0800
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Subject: [PATCH] Define alignof using _Alignof when using C11 or newer
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WG14 N2350 made very clear that it is an UB having type definitions
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within "offsetof" [1]. This patch enhances the implementation of macro
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alignof to use builtin "_Alignof" to avoid undefined behavior on
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when using std=c11 or newer
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clang 16+ has started to flag this [2]
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Fixes build when using -std >= gnu11 and using clang16+
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Older compilers gcc < 4.9 or clang < 8 has buggy _Alignof even though it
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may support C11, exclude those compilers too
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[1] https://www.open-std.org/jtc1/sc22/wg14/www/docs/n2350.htm
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[2] https://reviews.llvm.org/D133574
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Upstream-Status: Pending
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Signed-off-by: Khem Raj <raj.khem@gmail.com>
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---
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libiberty/sha1.c | 10 ++++++++++
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1 file changed, 10 insertions(+)
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diff --git a/libiberty/sha1.c b/libiberty/sha1.c
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index 49e8e0b6c2b..72de5cc8ad6 100644
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--- a/libiberty/sha1.c
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+++ b/libiberty/sha1.c
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@@ -234,7 +234,17 @@ sha1_process_bytes (const void *buffer, size_t len, struct sha1_ctx *ctx)
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if (len >= 64)
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{
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#if !_STRING_ARCH_unaligned
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+/* GCC releases before GCC 4.9 had a bug in _Alignof. See GCC bug 52023
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+ <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52023>.
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+ clang versions < 8.0.0 have the same bug. */
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+#if (!defined __STDC_VERSION__ || __STDC_VERSION__ < 201112 \
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+ || (defined __GNUC__ && __GNUC__ < 4 + (__GNUC_MINOR__ < 9) \
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+ && !defined __clang__) \
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+ || (defined __clang__ && __clang_major__ < 8))
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# define alignof(type) offsetof (struct { char c; type x; }, x)
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+#else
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+# define alignof(type) _Alignof(type)
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+#endif
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# define UNALIGNED_P(p) (((size_t) p) % alignof (sha1_uint32) != 0)
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if (UNALIGNED_P (buffer))
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while (len > 64)
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