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The CMAKE_BUILD_TYPE variable is used to specify a build type. Typically, the selected option (by default empty, but it can be Release, Debug, or some others) is used to figure out what options to use/flags to set when cmake actually calls the compiler.
In short, Release tells the compiler to do optimization and omit debug information that Debug would tell it to keep. I've seen some people recommend using -DCMAKE_BUILD_TYPE=Release for better performance.
Calling catkin_make (and not specifying a value for CMAKE_BUILD_TYPE) results in something similar to using the Debug value.
See:
https://codeyarns.com/2015/05/14/buil...
https://cmake.org/cmake/help/v3.0/var...
+1 to use Release for better performance. It depends on the source how much the gain is but I had cases where a release build was running around 100 times faster than a debug build. So as a rule of thumb: Always use Release except when debug symbols are explicitly needed.
Asked: 2018-06-24 20:36:08 -0500
Seen: 7,608 times
Last updated: Jun 24 '18
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This is a direct duplicate of at least #q294789, which was asked 4 days ago.