Fix clang errors
3781 gcc4.7 __cplusplus change incompatibility
3781 gcc4.7 __cplusplus change incompatibility

*** 41,52 ****
   */
  
  #ifndef _ISO_STDLIB_ISO_H
  #define _ISO_STDLIB_ISO_H
  
- #pragma ident   "%Z%%M% %I%     %E% SMI"
- 
  #include <sys/feature_tests.h>
  
  #ifdef  __cplusplus
  extern "C" {
  #endif
--- 41,50 ----
*** 126,141 ****
  extern double atof(const char *);
  extern int atoi(const char *);
  extern long int atol(const char *);
  extern void *bsearch(const void *, const void *, size_t, size_t,
          int (*)(const void *, const void *));
! #if __cplusplus >= 199711L
  extern "C++" {
          void *bsearch(const void *, const void *, size_t, size_t,
                  int (*)(const void *, const void *));
  }
! #endif /* __cplusplus >= 199711L */
  extern void *calloc(size_t, size_t);
  extern div_t div(int, int);
  extern void exit(int)
          __NORETURN;
  extern void free(void *);
--- 124,139 ----
  extern double atof(const char *);
  extern int atoi(const char *);
  extern long int atol(const char *);
  extern void *bsearch(const void *, const void *, size_t, size_t,
          int (*)(const void *, const void *));
! #if __cplusplus >= 199711L && defined(__SUNPRO_CC)
  extern "C++" {
          void *bsearch(const void *, const void *, size_t, size_t,
                  int (*)(const void *, const void *));
  }
! #endif /* __cplusplus >= 199711L && defined(__SUNPRO_CC) */
  extern void *calloc(size_t, size_t);
  extern div_t div(int, int);
  extern void exit(int)
          __NORETURN;
  extern void free(void *);
*** 146,160 ****
  extern int mblen(const char *, size_t);
  extern size_t mbstowcs(wchar_t *_RESTRICT_KYWD, const char *_RESTRICT_KYWD,
          size_t);
  extern int mbtowc(wchar_t *_RESTRICT_KYWD, const char *_RESTRICT_KYWD, size_t);
  extern void qsort(void *, size_t, size_t, int (*)(const void *, const void *));
! #if __cplusplus >= 199711L
  extern "C++" {
          void qsort(void *, size_t, size_t, int (*)(const void *, const void *));
  }
! #endif /* __cplusplus >= 199711L */
  extern int rand(void);
  extern void *realloc(void *, size_t);
  extern void srand(unsigned int);
  extern double strtod(const char *_RESTRICT_KYWD, char **_RESTRICT_KYWD);
  extern long int strtol(const char *_RESTRICT_KYWD, char **_RESTRICT_KYWD, int);
--- 144,158 ----
  extern int mblen(const char *, size_t);
  extern size_t mbstowcs(wchar_t *_RESTRICT_KYWD, const char *_RESTRICT_KYWD,
          size_t);
  extern int mbtowc(wchar_t *_RESTRICT_KYWD, const char *_RESTRICT_KYWD, size_t);
  extern void qsort(void *, size_t, size_t, int (*)(const void *, const void *));
! #if __cplusplus >= 199711L && defined(__SUNPRO_CC)
  extern "C++" {
          void qsort(void *, size_t, size_t, int (*)(const void *, const void *));
  }
! #endif /* __cplusplus >= 199711L && defined(__SUNPRO_CC) */
  extern int rand(void);
  extern void *realloc(void *, size_t);
  extern void srand(unsigned int);
  extern double strtod(const char *_RESTRICT_KYWD, char **_RESTRICT_KYWD);
  extern long int strtol(const char *_RESTRICT_KYWD, char **_RESTRICT_KYWD, int);