However, I believe this doesn't properly enable LTO anywhere, because we don't pass the flag the compiler. And from the GCC manual:
To use the link-time optimizer, -flto and optimization options should be specified at compile time and during the final link. It is recommended that you compile all the files participating in the same link with the same options and also specify those options at link time.
I'd suggest we either remove the flag, or pass it to the compiler too, or use Meson's b_lto.
Aside: the inverse situation, passing -flto to only the compiler, generally works:
GCC automatically performs link-time optimization if any of the objects involved were compiled with the -flto command-line option.
Low priority ticket.
It looks like the intention is to enable LTO, because we pass
-fltoto the linker:https://github.com/crashappsec/libcon4m/blob/14604adf6ca68c75a08360129d71beb63571c1d1/meson.build#L41
However, I believe this doesn't properly enable LTO anywhere, because we don't pass the flag the compiler. And from the GCC manual:
I'd suggest we either remove the flag, or pass it to the compiler too, or use Meson's
b_lto.Aside: the inverse situation, passing
-fltoto only the compiler, generally works: