Enhancement: more common stdlib functions.

src/Environments/SysV/libc.so.inc

@@ -90,8 +90,10 @@ void __assert_fail(const char * assertion, const char * file, unsigned int line,
 size_t __fpending(FILE *stream);
 int __freading(FILE *stream);
 int __lxstat(int version, char * __path, struct stat * __statbuf);
+void * memchr(const void *s, int c, size_t n);
 void * __memcpy_chk(void * dest, const void * src, size_t len, size_t destlen);
 void * __mempcpy_chk(void * dest, const void * src, size_t len, size_t destlen);
+void * memrchr(const void *s, int c, size_t n);
 int __overflow(FILE *, int c);
 void * __rawmemchr(const void * s, int c);
 void __stack_chk_fail(void);
@@ -169,17 +171,21 @@ char * strchr(char *, char);
 int strcmp(char *,char *);
 int strcoll ( const char * str1, const char * str2 );
 char * strcpy(char * dst, char * src);
+size_t strcspn ( const char * str1, const char * str2 );
 char * strdup(const char *);
 char * __strdup(const char *);
+char *strndup( const char *str, size_t size );
 size_t strlen(char *);
 int strncasecmp(char *, char *, int n);
 char * strncat(char * destination, const char * source, size_t num );
 int strncmp(char * dst, char * src, int n);
 int strncpy(char *, char *, int n);
 char * strpbrk(char *, char *);
 char * strrchr(char *, char);
+size_t strspn( const char * str1, const char * str2 );
 char * strstr(char *, char *);
 char * strtok(char * str, const char * delimiters);
+double strtod(const char * str, char ** endptr);
 float strtof(const char * str, char ** endptr);
 int strtol(char * s);
 unsigned long int strtoul(const char *nptr, char **endptr, int base);