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$I or $INCLUDE : Include compiler info

In this form: 

 {$INCLUDE %xxx%}
where xxx is one of the following:
DATE
Inserts the current date.
FPCTARGET
Inserts the target CPU name. (deprecated, use FPCTARGETCPU)
FPCTARGETCPU
Inserts the target CPU name.
FPCTARGETOS
Inserts the target OS name.
FPCVERSION
Current compiler version number.
FILE
Filename in which the directive is found.
LINE
Linenumer on which the directive is found.
TIME
Current time.

If xxx is none of the above, then it is assumed to be the name of an environment variable. Its value will be fetched. As a reult, this will generate a macro with the value of these things, as if it were a string.

For example, the following program 

 Program InfoDemo;
 
 Const User = {$I %USER%};
 
 begin
   Write ('This program was compiled at ',{$I %TIME%});
   Writeln (' on ',{$I %DATE%});
   Writeln ('By ',User);
   Writeln ('Compiler version: ',{$I %FPCVERSION%});
   Writeln ('Target CPU: ',{$I %FPCTARGET%});
 end.
Creates the following output: 
 This program was compiled at 17:40:18 on 1998/09/09
 By michael
 Compiler version: 0.99.7
 Target CPU: i386

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