[CMake] Coverage Tests

[Daniel Stonier]

Had a problem with coverage tests on gentoo today.

Cmake 2.6.4-r3, g++ 4.3.2-r3, ccache 2.4-r7.

It couldn't find the coverage files, even with cflags and link flags
enabling "-fprofile-arcs -ftest-coverage". Similar worked on ubuntu no
problem.

A workaround for it I found was to explicitly link in the gcov library, so
with link flags it became "-fprofile-arcs -ftest-coverage -lgcov".

Is this expected/normal?


Regards,
Daniel.

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