Programming Delphi for Various Platforms and Versions

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Published on: April 22, 2017

Delphi has come a long ways since it was first released in 1995. It now compiles 32-bit or 64-bit, still creates console or Windows applications but now also can create Android and iOS apps if you have the FireMonkey library and cross-platform tools, you can create Android and iOS apps.

There are a lot of compiler directives that can be used in your code to selectively compile different sections of code depending on the platform or options being used. There are also symbols defined for each version of Delphi.

Many years ago, to test some of these symbols before I found clear documentation like the links given above, I wrote a program to list out the symbols defined when compiled under different versions of Delphi, and later added other conditional symbols to list out other capabilities of the executing environment. I recently revisited this program, pulled all the compiler directives out of the main form into a generic unit, and added a couple new applications using this new unit to the project group. I have put this set of programs up on GitHub under the name DelphiVersions on the off-chance someone might find it useful.

As of the date of this writing, this compiles under Delphi 10 Seattle and includes each of the following:

  • Windows VCL 32/64-bit
  • Windows Console 32/64-bit
  • Windows FireMonkey 32/64-bit


Here are some screen shots:

Windows VCL 32-bit

Windows Console 64-bit

Windows FireMonkey 64-bit

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