Introduction to the SAS/C Library

Rules for Using Different Releases of the Compiler and Library

Here are the rules for compiling, linking, and executing programs with different releases of the compiler and library:

For a newly compiled program, use a more recent release of the transient library than the compiler, or use the same release. A program compiled and linked with an older release will run with a new release of the transient library. If you run a newly compiled and linked program with an old release of the transient library, the program may fail in various ways, possibly with an 0C1 or 0C6 ABEND.
Use a release of the transient library that is the same or more recent than the resident library. If the transient library detects a release mismatch with the resident library, it prints a warning message.
Use a release of the resident library that is the same or more recent than the compiler. If you link compiled code with a wrong release of the resident library, no warning is produced. (However, you will likely get a system 0CX ABEND when you execute the program.)
Use a version of the SAS/C header files that is no more recent than the compiler version.
To link code produced by various releases of the compiler, use a release of the resident library that is at least as recent as the most recent release of the compiler used.
For an application with multiple load modules, link all modules of the load module with the same release of the resident library. If you do not, unpredictable errors may occur. However, you can still use more than one level of the compiler to generate the object code, provided that the modules are all compatible with the level of the resident library as specified earlier in this section.

Likely Results of Mixing Releases of the Compiler and Libraries shows the likely result of using different releases of the compiler and the resident and transient libraries to compile and link programs. If you are unsure which version of the library you are using, you can use the =version run-time option, which displays the library version numbers.

Note: Combining more than three versions of the compiler and resident and transient libraries becomes very complicated and is not documented here. In Likely Results of Mixing Releases of the Compiler and Libraries where a row contains two entries of "older," they refer to the same older version. [cautionend]

Likely Results of Mixing Releases of the Compiler and Libraries
Program Transient Library Release Resident Library Release Compiler Release Likely Result: Will Program Run?

1 current current current Yes

2 current current previous Yes

3 current current older Yes

4 current previous current No

5 current previous previous Yes

6 current previous older Yes

7 current older current No

8 current older previous No

9 current older older Yes

10 previous current current No

11 previous current previous No

12 previous current older No

13 previous previous current No

14 previous previous previous Yes

15 previous previous older Yes

16 previous older current No

17 previous older previous No

18 previous older older Yes

19 older current current No

20 older current previous No

21 older current older No

22 older previous current No

23 older previous previous No

24 older previous older No

25 older older current No

26 older older previous No

27 older older older Yes

***Likely Results of Mixing Releases of the Compiler and Libraries***
Program	Transient Library Release	Resident Library Release	Compiler Release	Likely Result: Will Program Run?
1	current	current	current	Yes
2	current	current	previous	Yes
3	current	current	older	Yes
4	current	previous	current	No
5	current	previous	previous	Yes
6	current	previous	older	Yes
7	current	older	current	No
8	current	older	previous	No
9	current	older	older	Yes
10	previous	current	current	No
11	previous	current	previous	No
12	previous	current	older	No
13	previous	previous	current	No
14	previous	previous	previous	Yes
15	previous	previous	older	Yes
16	previous	older	current	No
17	previous	older	previous	No
18	previous	older	older	Yes
19	older	current	current	No
20	older	current	previous	No
21	older	current	older	No
22	older	previous	current	No
23	older	previous	previous	No
24	older	previous	older	No
25	older	older	current	No
26	older	older	previous	No
27	older	older	older	Yes

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