How do you set the main program in xcode when using pascal? - xcode

Question

I am getting the following error using xcode with pascal:
warning: It seems your project only contains units and no main program
What causes this warning? And how do I set the main program?
I am using: Xcode 4.5.2, Free Pascal Compiler version 2.6.0, and Mac OSX 10.8.

Answer 1

If I understand the problem correctly, you're missing the .dpr (project file) that tells the compiler what type of project it should be building. The project file for Delphi (and the Borland Pascal and Turbo Pascal compilers before it) typically look something like:
{ For a GUI (Windows) application }
program MyProgram;
uses
Forms,
main in 'main.pas' {fMain};
{$R *.RES}
begin
Application.Initialize;
Application.CreateForm(TfMain, fMain);
Application.Run;
end.
{ For a console application }
program MyProgram;
{$APPTYPE CONSOLE }
uses
MyMain, SysUtils;
begin
try
{
Execute your application's entry point (main()) here, in this case
contained in MyMain.pas that's listed in the uses clause above.
}
except
{ Handle any exception here }
end;
end.
In Delphi XE2, you then run dpr2xcode.exe to create a corresponding Xcode project. (I don't know what the corresponding step would be in FreePascal, but you might look for something like that in your FP install.) Open that .xcodeproj file in Xcode on the Mac, and then run or debug the code.
For specific info on using FreePascal and Xcode, I recommend a series of articles by Phil Hess.