Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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29 lines
1.0 KiB
29 lines
1.0 KiB
// Protocol Buffers - Google's data interchange format |
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// Copyright 2017 Google Inc. All rights reserved. |
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// |
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// Use of this source code is governed by a BSD-style |
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// license that can be found in the LICENSE file or at |
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// https://developers.google.com/open-source/licenses/bsd |
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#include <string.h> |
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// On x86-64 Linux with glibc, we link against the 2.2.5 version of memcpy so |
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// that we avoid depending on the 2.14 version of the symbol. This way, |
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// distributions that are using pre-2.14 versions of glibc can successfully use |
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// the gem we distribute |
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// (https://github.com/protocolbuffers/protobuf/issues/2783). |
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// |
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// This wrapper is enabled by passing the linker flags -Wl,-wrap,memcpy in |
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// extconf.rb. |
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#ifdef __linux__ |
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#if defined(__x86_64__) && defined(__GNU_LIBRARY__) |
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__asm__(".symver memcpy,memcpy@GLIBC_2.2.5"); |
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void *__wrap_memcpy(void *dest, const void *src, size_t n) { |
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return memcpy(dest, src, n); |
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} |
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#else |
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void *__wrap_memcpy(void *dest, const void *src, size_t n) { |
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return memmove(dest, src, n); |
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} |
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#endif |
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#endif
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