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#include <features.h>
#if defined(__GNUC__) && defined(__GLIBC_PREREQ)
# if __GLIBC_PREREQ(2,3)
/* squash __ctype_to{upper,lower}_loc and avoid including the header */
# define _CTYPE_H 1
extern int isalnum(int c);
extern int isalpha(int c);
extern int isascii(int c);
extern int isblank(int c);
extern int iscntrl(int c);
extern int isdigit(int c);
extern int isgraph(int c);
extern int islower(int c);
extern int isprint(int c);
extern int ispunct(int c);
extern int isspace(int c);
extern int isupper(int c);
extern int isxdigit(int c);
/* squash realpath@GLIBC_2.3 */
# include <stdlib.h>
/* asm (".symver realpath, realpath@GLIBC_2.0"); */
# endif
#endif
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