Linking against older symbol version in a .so file

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I found the following working solution. First create file memcpy.c:

#include <string.h>

/* some systems do not have newest memcpy@@GLIBC_2.14 - stay with old good one */
asm (".symver memcpy, memcpy@GLIBC_2.2.5");

void *__wrap_memcpy(void *dest, const void *src, size_t n)
{
    return memcpy(dest, src, n);
}

No additional CFLAGS needed to compile this file. Then link your program with -Wl,–wrap=memcpy.

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