Enable breakpoint in release mode in VC6

It seems that the VC6 didn't enable debug by breakpoint in release mode. To turn it on, try the following way posted in stackoverflow.

In VS, right click your project, chose "Properties".

1. Click the C/C++ node. Set Debug Information Format to C7 compatible (/Z7) or Program Database (/Zi).
2. Expand Linker and click the General node. Set Enable Incremental Linking to No (/INCREMENTAL:NO).
3. Select the Debugging node. Set Generate Debug Info to Yes (/DEBUG).
4. Select the Optimization node. Set References to Yes (/OPT:REF).

   if /OPT:REF is specified, /OPT:ICF is on by default.

That's ripped directly from Microsoft's documentation:

• How to: Debug a Release Build
• OPT Optimizations

I do this all of the time and pretty much never debug in debug mode anymore. As you know, many errors that occur in a release build may not occur in a debug build (almost certainly the errors that arise from invoking UB).

Also, I work on a project which uses a ton of image processing and performs a lot of compression/decompression of large images. Using a slow debug build is simply impractical.