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Try adding #include <stdlib.h> directly above the previous added #include statement.

Same exact failure.

Upon close inspection it is actaully a different failure. I also notice that you are building with multiple processes (i.e. with a -j flag that is greater than one), which can cause weird failures like the ones you are noticing.

Seems there is something wrong with main.cpp.

There shouldn't be. I just ran a rebuild under Debian with one build process with no problems.

Tim