lazarus读取版本信息(适用于windows/linux/macos)

从官网论坛看到的(https://wiki.freepascal.org/Show_Application_Title,_Version,_and_Company#FPC_3.0.2B)。
下面的方法适用FPC3.0以上版本：

program printfileinfo;

{ 
  Displays file version info for 
- Windows PE executables 
- Linux ELF executables (compiled by Lazarus)
- macOS MACH-O executables (compiled by Lazarus)
  Runs on Windows, Linux, macOS
}

{$mode objfpc}{$H+}
{$ifdef mswindows}{$apptype console}{$endif}
uses
  {$IFDEF UNIX}{$IFDEF UseCThreads}
  cthreads,
  {$ENDIF}{$ENDIF}
  Classes,sysutils
  // FPC 3.0 fileinfo reads exe resources as long as you register the appropriate units
  , fileinfo
  , winpeimagereader {need this for reading exe info}
  , elfreader {needed for reading ELF executables}
  , machoreader {needed for reading MACH-O executables}
  ;

var
  FileVerInfo: TFileVersionInfo;

{$R *.res}

begin
  FileVerInfo:=TFileVersionInfo.Create(nil);
  try
    FileVerInfo.ReadFileInfo;
    writeln('Company: ',FileVerInfo.VersionStrings.Values['CompanyName']);
    writeln('File description: ',FileVerInfo.VersionStrings.Values['FileDescription']);
    writeln('File version: ',FileVerInfo.VersionStrings.Values['FileVersion']);
    writeln('Internal name: ',FileVerInfo.VersionStrings.Values['InternalName']);
    writeln('Legal copyright: ',FileVerInfo.VersionStrings.Values['LegalCopyright']);
    writeln('Original filename: ',FileVerInfo.VersionStrings.Values['OriginalFilename']);
    writeln('Product name: ',FileVerInfo.VersionStrings.Values['ProductName']);
    writeln('Product version: ',FileVerInfo.VersionStrings.Values['ProductVersion']);
  finally
    FileVerInfo.Free;
  end;
end.

FPC3.0之前版本使用下面的方法读取版本信息

uses
  resource, versiontypes, versionresource;

 FUNCTION resourceVersionInfo: STRING;
 
 (* Unlike most of AboutText (below), this takes significant activity at run-    *)
 (* time to extract version/release/build numbers from resource information      *)
 (* appended to the binary.                                                      *)
 
 VAR     Stream: TResourceStream;
         vr: TVersionResource;
         fi: TVersionFixedInfo;
 
 BEGIN
   RESULT:= '';
   TRY
 
 (* This raises an exception if version info has not been incorporated into the  *)
 (* binary (Lazarus Project -> Project Options -> Version Info -> Version        *)
 (* numbering).                                                                  *)
 
     Stream:= TResourceStream.CreateFromID(HINSTANCE, 1, PChar(RT_VERSION));
     TRY
       vr:= TVersionResource.Create;
       TRY
         vr.SetCustomRawDataStream(Stream);
         fi:= vr.FixedInfo;
         RESULT := 'Version ' + IntToStr(fi.FileVersion[0]) + '.' + IntToStr(fi.FileVersion[1]) +
                ' release ' + IntToStr(fi.FileVersion[2]) + ' build ' + IntToStr(fi.FileVersion[3]) + eol;
         vr.SetCustomRawDataStream(nil)
       FINALLY
         vr.Free
       END
     FINALLY
       Stream.Free
     END
   EXCEPT
   END
 END { resourceVersionInfo } ;