Trouble building individual Indigo/Bingo targets

It seems that for both Indigo and Bingo the build process is all or nothing.

I had trouble building a subset of targets and from inspecting CMakelists.txt I noticed that as per line 45, if _BUILD_INDIGO_WRAPPERS_ is _ON_ then all sub-targets, namely _BUILD_INDIGO_WRAPPERS_PYTHON_, _BUILD_INDIGO_WRAPPERS_JAVA_, _BUILD_INDIGO_WRAPPERS_DOTNET_ are turned on. Similarly by line 51, if _BUILD_INDIGO_WRAPPERS_ is _OFF_ then all sub-targets are disabled. Thus, as far as I can tell, it is impossible to build only _BUILD_INDIGO_WRAPPERS_PYTHON_, for example as _BUILD_INDIGO_WRAPPERS_ will override any and all individual options.

The same is true of Bingo due to _BUILD_BINGO_ and lines 59 and 64, respectively.

If I delete line 45-69 then the building of individual targets works as expected (with loss of functionality of _BUILD_INDIGO_WRAPPERS_ and _BUILD_BINGO_ ).

Is this by design?