As per the following link:
http://docwiki.embarcadero.com/RADStudio/Seattle/en/Example_of_CODEGEARC_VERSION_Macro
The major/minor versions must be decoded as a hex string, while the patch
version must be decoded as a normal decimal string.
As an example, C++ Builder XE 8.1's bcc32.exe sets this macro to 0x070189C9.
The file version of bcc32.exe is 7.1.5570.35273. Therefore, the correct
interpretation to COMPILER_VERSION would be 7.1.35273.
This will allow sharing of the logic of the order to test compilers in
and the preprocessor macros used to do that and to determine the
version components.
James Johnston
Stephen Kelly