C-language compilation environment

The QNX Neutrino RTOS provides the following C-language compilation environments:

• a C-language compilation environment with 32-bit int, long, pointer, and off_t types
• a C-language compilation environment with 32-bit int, long, and pointer types, and an off_t type using at least 64 bits

QNX Neutrino doesn't provide the following C-language compilation environments:

• a C-language compilation environment with 32-bit int, and 64-bit long, pointer, and off_t types
• a C-language compilation environment with int using at least 32-bits, and long, pointer, and off_t types using at least 64 bits

The Base Definitions Volume defines these four scenarios as possible C-language compilation environment offerings, but doesn't define which corresponding execution environments are supported. The QNX Neutrino RTOS supports the same execution environments as it does compilation environments.

The largest type that can be stored in type off_t is long long The standard requires that off_t be able to store any value contained in type long.