On Monday, 10 August 2020 at 11:11:57 UTC, Per Nordlöw wrote:
Are the official LDC-releases builtin with or without LTO?
Most of them are, but not sure why that matters here (the gain is
almost negligible and mainly interesting for the C++ parts - as
all D files are compiled to a single object file anyway).
On Monday, 10 August 2020 at 05:54:14 UTC, Daniel Kozak wrote:
I am not sure but last time I checked ldc does not do cross
module inlinig by default,
Right, it's still experimental and has issues.
and LTO only help if your ldc(druntime+phobos) are built with
enabled LTO
That's only true if (mostly non-templated) functions in
druntime/Phobos are to be cross-module inlined, just like any
other library. In that case, you can simply use
`-flto=<thin|full> -defaultlib=phobos2-ldc-lto,druntime-ldc-lto`
with LDC builds shipping with LTO druntime/Phobos and don't have
to recompile druntime/Phobos manually anymore.
