glibc/sysdeps/x86_64/multiarch/strstr-c.c

#include "init-arch.h"

#define STRSTR __strstr_sse2
#ifdef SHARED
# undef libc_hidden_builtin_def
# define libc_hidden_builtin_def(name) \
  __hidden_ver1 (__strstr_sse2, __GI_strstr, __strstr_sse2);
#endif

#include "string/strstr.c"

extern char *__strstr_sse42 (const char *, const char *) attribute_hidden;
extern __typeof (__strstr_sse2) __strstr_sse2 attribute_hidden;

libc_ifunc (strstr, HAS_SSE4_2 ? __strstr_sse42 : __strstr_sse2);