[FAQ] Compiler: Refer to compiler version number in your source

Consider this example ...

// version_example.c

// Examples of how to use __TI_COMPILER_VERSION__, the preprocessor
// symbol predefined by all TI compilers

int as_int = __TI_COMPILER_VERSION__;                   // as an int

#define EVAL_TO_STR(arg) #arg
#define MKSTR(arg) EVAL_TO_STR(arg)
char *as_string = MKSTR(__TI_COMPILER_VERSION__);       // as a string

The preprocessor symbol __TI_COMPILER_VERSION__ is predefined by all TI compilers.  This example shows how to use it as an integer, and as a string.  

To show more detail on what happens, the following command builds this example with TI ARM compiler version 20.2.1.LTS.  The option --gen_preprocessor_listing creates a preprocessor listing file of the same name, but with file extension changed to .rl.  

% armcl --gen_preprocessor_listing version_example.c

Here are some key lines from version_example.rl ...

Nint as_int = __TI_COMPILER_VERSION__;                   // as an int
Xint as_int = 20002001;

...

Nchar *as_string = MKSTR(__TI_COMPILER_VERSION__);       // as a string
Xchar *as_string = "20002001";

Every line in a .rl file starts with a capital letter which identifies that line.  N shows a normal line of source before preprocessing.  X shows an expanded line of source after preprocessing.

For more details, please search the manual of the compiler for your CPU family for the sub-chapter titled Generating a Raw Listing File.

Thanks and regards,

-George