Disabling all the bindings by default.

[RishabhGarg108]

As discussed yesterday in the IRC, some of the bindings are by default being built with cmake and it is cumbersome to manually switch them off since for most cases, people don't need them. So it might be a good idea to disable all of them by default.
For this, there are to approaches :-

1. To disable all the bindings by default. (suggested by @rcurtin and definitely a valid approach)
2. To add another option -DBUILD_BINDINGS=OFF. This option could be given precedence over all other BUILD_X_BINDINGS and it will enable/disable all of the bindings at once. (This option could be useful if lets say we add or change any xx_main.cpp file and we want to test if all bindings are correctly working or not.)

I think both the approaches are fine, and we can do whatever fits best for most.

[rcurtin]

This is a nice issue for someone who has a little bit of knowledge with CMake and is looking to contribute. 👍 I'd suggest the first of the two approaches (I think it would be easier), but either works.

[RishabhGarg108]

I would like to go ahead with this. Through this issue, I can probably add one more skill to my bag. :)
I would go with the first approach.
Can you suggest me where shall I start looking ?
Thanks!

[jeffin143]

@RishabhGarg108 You can toggle the following

mlpack/CMakeLists.txt

Line 64 in 4d01fe5

option(BUILD_GO_BINDINGS "Build Go bindings." ON)

, It is currently ON by default you can switch it off and same with others

[RishabhGarg108]

Thanks @jeffin143 !

[Yashwants19]

Addressed in #2782.