delphi - Make $DEFINE permanent across several modules -

I have a number of projects that use some common code. It is conditionally defined in the project settings and I want to be able to define some of the symbols that continue in many modules. For example:

  {$ if defined is defined (PROJ1_DEBUG) or defined (PROJ1_NDEBUG)} {$ Definition PROJ1} // Project 1 {$ elseif is defined ( PROJ2_DEBUG) or defined (PROJ2_NDEBUG)} {$ Definition PROJ2} // Project 2 {$ elseif is defined (else, PROJ3_DEBUG) or defined (PROJ3_NDEBUG)} {$ PROJ3 Definition} // Project 3 {$ IFEND}  

That's why the main project file can appear on top, now I have projects In many units, you want to be able to use the following conditional compilation:

  {$ ifdef PROJ1} Do some specific work // $ {$ endif} for project {$ ifdef PROJ2} Do not do specific / project 2 {$ endif}  

but I try to find that "PROJ1" and "PROJ2" (and "PROJ3" are obviously not defined) when I try And their use Embarcadero (help) shows my symbols will only be defined for the current module But they will not provide any help to define across multiple modules.

I can define it that it is possible to define more permanent symbols once and then use them across multiple modules?

You have two options:

1. conditionally defined at the project level Please. From the project options dialog.
2. Define the conditional inclusion of an included file that you need to test every unit conditional.