22-Nov-2013 03:25, Jesse Phillips пишет:
On Thursday, 21 November 2013 at 21:20:59 UTC, Gary Willoughby wrote:
Can someone explain the -allinst compiler flag for me please? I've
absolutely no idea what this flag does or when to use it.
I don't think I have have an understanding of it, but here is what I
think I had read. If I'm right, please say so. If not again, say so and
ignore me.
-allinst causes the compiler to preform the same behavior as prior to
2.064. What was that behavior? When building the program all the called
templates would get instantiated (those in the library used and the
other program files). What changed (again my interpretation of a quick
read) was that the library will include the instances of the template
used in the library. When generating the program the code for the
templates where expected to exist in the library so that it doesn't have
to instantiate them again. I suspect this leads to expecting instances
which haven't actually been used to exist in the library, so you use the
flag -allinst to force the compiler to build all the instances being used.
Something like that, plus compiler now tries not to generate instances
that are only used in C-T checks (static ifs etc.). Something in this
logic is currently broken or implementation is lacking, hence the
workaround switch.
--
Dmitry Olshansky
