### IBM C and C++ Compilers Functions and Macros: "R"

Function/Macro | #include file | ANSI/ISO | ANSI/ISO 93 | POSIX | XPG4 | Extension | Subsystem
raise | <signal.h> | X |  |  | X |  |
rand | <stdlib.h> | X |  | X |  |  |
read | <io.h> |  |  |  | X | X | X
realloc | <stdlib.h> <malloc.h> | X |  | X | X | X | X
regcomp | <regex.h> |  |  | X | X |  |
regerror | <regex.h> |  |  | X | X |  |
regexec | <regex.h> |  |  | X | X |  |
regfree | <regex.h> |  |  | X | X |  |
remove | <stdio.h> <io.h> | X |  | X | X |  |
rename | <stdio.h> <io.h> | X |  | X | X |  |
rewind | <stdio.h> | X |  | X | X |  |
rmdir | <direct.h> |  |  |  | X | X |
_rmtmp | <stdio.h> |  |  |  |  | X |
_rotl | <stdlib.h> <builtin.h> |  |  |  |  | X X |
_rotr | <stdlib.h> <builtin.h> |  |  |  |  | X X |
rpmatch | <stdlib.h> |  |  | X |  | X |

IBM C and C++ Compilers Functions and Macros