Description

The USL C/C++ compiler. Mostly provided with USL variants of Unix System V Release 4, SCO OpenServer, and SCO UnixWare.

It was replaced by the SCO Development System with later versions of SCO OpenServer and SCO UnixWare.

Macros

Examples

Notes

For the exact identity of the USL compiler's version you're probably firmly in the "It's Unix!" nonsense ala AT&T Unix. However, we can do some guesswork.

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31

#include <stdio.h>

int
main(void)
{
#if defined(_M_SYS5) || defined(_M_SYSV)
  printf("Host is System V.\n");
#endif

#if defined(M_UNIX) || defined(unix)
# if defined(M_XENIX)
  printf("Xenix or OpenServer\n");
# endif

  printf("Unix.\n");
#endif

#if defined(__USLC__)
  printf("USL C compiler.\n");
#endif

#if defined(_SCO_DS)
  printf("SCO C compiler.\n");
#endif

#if defined(__SCO_VERSION__)
  printf("SCO compiler version %d\n", __SCO_VERSION__);
#endif

  return 0;
}

On UnixWare 7.1.3, this picks up unix, __USLC__, and __SCO_VERSION__.

On OpenServer 5.0.7, this picks up _M_SYS5, _M_SYSV, M_UNIX, M_XENIX, __USLC__, and _SCO_DS.

See Also

SCO Development System