I have legacy code in C++Builder 6. I try to create a DLL from source code, but only one thing which I have on output is an EXE. I tried to change the application target extension and entry point, but nothing helps.
I think about compiling from console, but there is some errors in the project, that I can't see when compiling in the IDE. I have linker errors, which I can't fix.
At least all code are "extern C" and I need lib and dll.
How can I compile a DLL from the app source?
A DLL needs certain pre-defined functions and the project Wizard creates them for you automatically, so
Start a new fresh project as a DLL/library project.
Create a simple function that you can test.
Compile the DLL and load it (and call the test function) from an .exe in another project to check that it's working.
Copy the essential parts of your old code, bit by bit, from the old .exe project into the correct places in the new DLL/library project.
Done.