CMAKE_BUILD_TYPE is not propagated to the subprojects of the superbuild

[Nicogene]

@marcoaccame and I tried to change CMAKE_BUILD_TYPE to Debug from the "root" build of the superbuild, either via ccmake and via cmake -DCMAKE_BUILD_TYPE=Debug, but all the subprojects remained compiled in Release. It seems that CMAKE_BUILD_TYPE is not propagated properly to the subprojects.

We tried in an existing build, we didn't try if this is a problem that occurs also from a fresh build

[traversaro]

Indeed the option is set just in the initial cache, not passed everytime: https://github.com/robotology/ycm-cmake-modules/blob/69fbc71bf7e2a205742507b4ed0750646d22381c/modules/YCMEPHelper.cmake#L292 .