You can compare two builds using a specific search syntax in Klocwork Static Code Analysis. This allows you to see what changes have occurred between those two builds (for example, to see what issues have been fixed between builds).

When should you compare builds?

Typically, the build comparison would be most helpful in two situations:

You have upgraded to a new version of Klocwork. We recommend running your final pre-upgrade analysis and your first Klocwork 2018.1 analysis on identical source code, and then comparing the two builds, so that you can properly assess the changes in your analysis results due to improvements in our analysis engine. For details on improved, added and removed checkers in this version, see What's New.
You want to compare your current build with a milestone build (such as a recent product release)

For other comparisons, reports probably better suit your needs.

Using the build comparison syntax

If you're not already viewing the Projects list, click Projects at the top left.
Locate your project in the list and click the New or Open issues link.
In the Search for field, use the following syntax:
```
diff:<build1>,<build2> [state:New|Fixed|Existing]
```
The order of specifying the builds doesn't matter. If the build name contains spaces, you must surround it with quotation marks.

Examples

If you simply specify two builds, you see a list of all issues that exist in both specified builds:

diff:build_1,build_5

Using the keyword state with New, Fixed or Existing filters the list of issues by state. This example shows you all issues that have been fixed between build_1 and build_5:

diff:build_1,build_5 state:Fixed

You can also use the keyword last to compare a specific build to the most recent build:

diff:build_3,last