On Wednesday, 3 October 2018 at 20:41:15 UTC, welkam wrote:
I was playing around with dmd`s make file trying to see if I can compile dmd with different compilers and different compilation flags. By playing around I found that some dmd files are compiled with -vtls flag unconditionally and that ldc do not support this flag. First I dont know what -vtls flag does so I looked at documentation...
Aren't all variables thread local unless explicitly specified?
No, all *static non-immutable* variables are thread-local by default, not just "all variables".
What this flag does? Why some files compiled with it and other dont? Why it is added to all compilation targets unconditionally?
It does what it says, just prints some diagnostic info. You can just ignore it, i.e. not use it. As for why it's in the makefile, I can only guess that someone keeps it there for diagnostic purposes :)
