[GTALUG] ftrace-time support in Clang

[D. Hugh Redelmeier]

| From: Nicholas Krause via talk <talk at gtalug.org>
| 
| This seems to be a rather not know option on the LLVM side and it seems GCC
| does not support it.
| https://www.phoronix.com/scan.php?page=news_item&px=LLVM-Clang-9.0-Time-Trace
| 
| Its now in mainline as the articles like this one were mostly written before
| it was merged in clang/llvm
| version 9. 10 was just released so its now in the mainline.
| 
| Maybe it interests some people here who build large software products or use
| embedded build systems,

As I understand the description, it lets you find the hot-spots in the
compilation process (i.e. the runtime of an LLVM compiler itself).  I
admit that the description doesn't make this completely clear.

If I'm right, this feature is only useful for LLVM developers.