How to specify a preprocessor directive in eclipse?

Question

How are preprocessor directives specified in eclipse for different configurations? For instance if I have multiple mains that should be run in different configurations and specify

#ifdef Problem1
//main func
#endif /*Problem1*/

Note that this is with managed makefiles

Brandt

Answer 1

The documentation points to "C/C++ Project Properties" → "Paths and Symbols" → "Symbols".

However, usually it is better to use different source files for different configurations/architectures/... instead of extensive preprocessor usage.

Romanticist

I was planning on using different source files, but I cannot have multiple mains in the build. Is there a better way to specify which main function or file is used? – Brandt

@Adam: I was thinking of only including specific source files with different mains in the build depending on the configuration. I don't have Eclipse here now, but "exclude resource from build" here according to the configuration should do it. – Romanticist

Sadly, this information is 11 years old now. The latest Eclipse menu tree is different. I've looked all through it and cannot find a setting for this. – Maleeny