This option specifies the language standard of the C source file.
[Specification format]
 
-  | Interpretation when omitted  | 
 
Compilation is executed in accord with the C90 standard.
[Detailed description]
-  | This option specifies the language standard of the C source file.  | 
 
-  | When the -lang=c option is specified or the option is omitted, compilation is executed in accord with the C90 standard.  | 
 
-  | When the -lang=c99 option is specified, compilation is executed in accord with the C99 standard.  | 
 
-  | If any option other than -lang=c or -lang=c99 is specified, an error will occur.  | 
 
[Remark]
-  | This compiler does not support the following language standards.  | 
 
-  | Some header files and standard library functions in the C90/C99 language standard  | 
 
-  | Complex number types in the C99 language standard  | 
 
-  | Variable-length arrays in the C99 language standard  |