Q: XCode Warning: "/* within block comment" I really like to temporary enable and disable code parts by commenting them this way:
/*
some code
/**/

(Mind the 

/**/

instead of 

*/

at the end)
However, XCode keeps giving me the warning:
/* within block comment

Is there any way to "custom-disable" specific warnings?
WHY? I will tell you why: Because I can easily take it in and out with only one character, without having to scroll down the block to take the "*/ in and out.

A: When I want to temporarily remove a block of code I use:
#if 0
somecode();
#endif

Which avoids this issue and is easy to spot later.
If I want to later temporarily re-enable that code, then I simply flip the 0 to 1:
#if 1
somecode();
#endif

However if this enable/disable needs to be more visible, and easier to control, then I use a constant defined at the top of the source file instead:
#define SOME_FANCY_FEATURE 1

...

#if SOME_FANCY_FEATURE
somecode();
#endif // SOME_FANCY_FEATURE


A: I found a very nice alternative to: 
/*    
some code
/**/

You can just use this variant:
/*
some code
//*/

to achieve the same goal without any Xcode warnings!

A: The real answer for me (just disabling an XCode warning, without changing any line in legacy code) is here: https://stackoverflow.com/a/21046102/540639
Apple LLVM 6.0 Custom Compiler Flags -> Other Warning Flags -> -Wno-comment
