The #pragma langlvl directive selects the C language level used for compilation.
This pragma must appear before any statements in a source file. The compiler uses predefined macros in the header files to make declarations and definitions available that define the specified language level.
Language levels available are:
| Language Level | Description |
| ansi | Defines the predefined macros __ANSI__ and __STDC__, and defines other langlvl variables. The default language level for the clc and c89 compiler invocations is ansi. |
  classic |
Defines the predefined macro __CLASSIC__, and undefines other langlvl variables. |
 compat |
Defines the predefined macro __COMPAT__, and undefines other langlvl variables. |
| extended | Defines the predefined macro __EXTENDED__, and undefines other langlvl variables. The default language level for the CC compiler invocation commands is extended. |
| saa |
Defines the predefined macro __SAA__, and undefines other langlvl variables. |
| saal2 |
Defines the predefined macro __SAA_L2__, and undefines other langlvl variables. |
The
langlvl 
/S[a|c|e|2]compiler option has the same effect as this pragma.
Preprocessor
Directives
C
Language Levels
#pragma Preprocessor
Directives
List of Preprocessor
Directives
