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32 lines
1.2 KiB
Plaintext
32 lines
1.2 KiB
Plaintext
From a09f6b5d033bb9cc52634833460409d4d815047b Mon Sep 17 00:00:00 2001
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From: begasus <begasus@gmail.com>
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Date: Sat, 6 Nov 2021 13:37:21 +0000
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Subject: Support GCC standard libraries which do not define __GLIBC_PREREQ
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https://github.com/VcDevel/Vc/pull/282
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diff --git a/Vc/global.h b/Vc/global.h
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index 6f85b3c..fd9cdeb 100644
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--- a/Vc/global.h
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+++ b/Vc/global.h
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@@ -132,7 +132,15 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#endif
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#ifdef Vc_GCC
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-# if Vc_GCC >= 0x70000 && defined __i386__ && (!defined __GLIBC_PREREQ || !__GLIBC_PREREQ(2,26))
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+# if Vc_GCC >= 0x70000 && defined __i386__
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+ // GCC 7 changed alignof(max_align_t) to 16. glibc 2.26 followed with malloc in 2.26.
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+ // 1. If GCC >= 7 and libc is not glibc max_align_t and malloc mismatch
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+ // 2. If GCC >= 7 and libc is glibc < 2.26 max_align_t and malloc mismatch
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+# ifdef __GLIBC_PREREQ
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+# if __GLIBC_PREREQ(2,26)
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+# define Vc_HAVE_STD_MAX_ALIGN_T 1
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+# endif
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+# endif
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// GCC 7 changed alignof(max_align_t) to 16. glibc 2.26 followed with malloc in 2.26.
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// 1. If GCC >= 7 and libc is not glibc max_align_t and malloc mismatch
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// 2. If GCC >= 7 and libc is glibc < 2.26 max_align_t and malloc mismatch
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--
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2.30.2
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